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Can AV bypass be done through the balanced input of the Diablos?

Can AV bypass be done through the balanced input of the Diablos?

AV bypass is possible via input 3 (RCA) "only" on the Diablo 120 and Diablo 300. Balanced input not possible. BTW, the 120 is not fully balanced, so there are no benefits to using a balanced cable.

For the Diablo 300, is the tape-out volume controlled or just line level?

For the Diablo 300, is the tape-out volume controlled or just line level?

The tape out is just line level. It is basically just an output “sniffing” on the selected input. The volume control is later in the signal flow.

The blue light indicator for the internal DAC flashes blue when the capacitor for the DAC is charging or is steady blue when the DAC is charged

The blue light indicator for the internal DAC flashes blue when the capacitor for the DAC is charging or is steady blue when the DAC is charged. However, the only time the Blue light shows is when the Brightness is set to off. When the Brightness is set to anything on 25, 50, 75 or 100% the Blue light remains off. Is that right?

The blue LED flashes while the super cap is charging and stops = switch off when it is fully charged. The blue LED switch on when the display is off to indicate “brightness: off” mode even though you have a DAC module installed, you might not see the blue LED flashing at power-up, unless the unit has been powered off for longer time.

Brightness setting

When I set the Brightness to off, the only section that turns off is the part that shows what input is playing and volume all other lights are on for volume up down and menu. Is that right?

It is correct and normal that the button backlights do not switch off in “brightness: off” mode. It is only the actual display showing input and volume information which switch off or is dimmed by the brightness setting. Otherwise, it wouldn’t be possible to locate the buttons if the backlight is off, since there isn’t any button text on the faceplate itself.

Connecting subs to Diablo 300

When connecting subs to Diablo 300, I know Diablo 300 has 2 sub outs for L & R sub and I have 2 subs that can use high level (speaker output) connections. However if the negative speaker terminal carries voltage you cannot attach the black lead you must attach to ground. Please let me know if the negative terminal of the speaker output carries a voltage or not and if it is safe to connect a powered sub to the positive and negative terminals or if the negative should go to ground.

It should be safe to connect the black wire for the high level input to the negative loudspeaker terminal on the Diablo 300 (the black terminals on the Diablo 300 do not carry a voltage, but should not be shorted to chassis ground. The subs should have a wire that serves as a signal ground but please check with the manufacturer. Some subs have a low level input ( e.g. a RCA socket) which you probably can use instead with the Diablo 300 sub outs. Again, check with the manufacturer of the sub.

Gryphon products care – face plates

What is the faceplate of Gryphon’s components made of and how do we care for it?

The faceplate and the display window are acrylic. The frame around the window is aluminum. Most marketplace dedicated products sold for cars or motorbikes for removing scratches or polishing acrylics can be used to care for the face plate. We strongly recommend always to try a polish product on a non-visible surface first to test it out.

Applies to:

Can a Gryphon stereo amplifier pass DC?

Can a Gryphon stereo amplifier pass DC? Gryphon’s technical specifications online do not provide the +/- roll-off points, they simply specify the frequency response being 0-350 kHz or 0-400 kHz. That would lead me to believe that any of Gryphon’s better amps are capable of passing DC.

Gryphon amplifiers are capable of passing DC. However, they won’t do it for longer time in order to protect the loudspeakers. Gryphon has DC-servo circuits built-in which will remove DC-content from the signal. If one for some reason puts a higher level of DC into the amplifier than the DC-servo can remove, the error detection circuit will shut the amplifier down in order to protect the loudspeakers.

Applies to:

Power down Gryphon amplifiers

Why must we power down Gryphon amplifiers before you connect or disconnect a USB cable with a DAC or a music server?

When there is a USB cable with the DAC or a music server, caution has to be exercised if you want to remove that cable or connect that cable as you must power down the amplifier before doing so. Otherwise, it could cause a short with the DAC, which in turn could blow the DAC and cause other damage to the amplifier itself.

Gryphon product registration

Can I register my Gryphon product online?

Yes. Click this link to register your Gryphon product

Applies to:

Setting for Gryphon DAC’s to yield an even more natural sound

There are two settings in the Gryphon DAC filter (Kalliope, DAC modules for Zena, Diablo 300 and Diablo 120). What is the difference between them?

We advise that you run the Kalliope in "SLOW" and not "FAST" model. This will produce a more natural (analogue) sound. This actually works the same way for DAC modules for Zena, Diablo 300 and also Diablo 120.

What type of Lemo connectors do we need for the Gryphon Legato Legacy phonostage

There is one pair of Lemo connectors included with each Legato Legacy phonostage.

The specifications for the Lemo connectors are shown in the next page. You can also purchase (spare) Lemo connectors from us. - both the standard for 5-6mm cable diameter (our item no. 1504) - and a version for 8-9mm cables (our item no. 1504 XL)

The connector at the tonearm might be different from model to model. You should get this info from the manufacturer of tonearm or turntable. A common -almost- standard is a female 5pin DIN, sometimes referred to as "SME-plug". We do not have a 5pin DIN plug. - Please also note that our cables are not suitable for this small plug.

You can find examples of wiring cables from SME to Lemo - and other on our website, please see the bottom of the page on "tips and tricks"

NB: One of the major advantages on the Legato Legacy phonostage is the fully balanced design. A cartridge is a balanced source and when the wiring is also fully balanced it is possible to get a noise and hum rejection which is far superior to a typical unbalanced setup. Thus, it is important to make a properly balanced wiring from the cartridge/tonearm to the Legato Legacy.

Gryphon Pandora with Legato Board – RCA input #4

Pandora Preamp's RCA input #4 with Legato Board installed

The Pandora Preamplifier's RCA input no. 4 is still a line-in (input) with the Legato Legacy boards installed. The Legato Legacy add their own Lemo socket inputs.

Gryphon Mephisto Power Amplifier – Stereo vs Solo

What is the difference between mono and stereo version of Mephisto?

Mephisto Solos have more output current (double that of the Stereo version) and a little more class A output power (from 2x175W in the Stereo versus 2x200W in the Solos @ 8 ohms).

From a listening experience standpoint, the Mono/Solo version has a dramatic increase in current capability which transforms into more woofer grip and control, offering a better overall headroom. We should point out that doubling the output current also doubles the dampening factor, giving noticeably more control over the woofers and laying down a considerably deeper foundation underneath the music. This also means that when the crescendo is reached at a end of a Mahler symphony for example, the amplifier still has considerable headroom so that the soundstage does not diminish. nor collapse, something that happens when there is a lack of power. It would be very noticeable on a pretty much any loudspeaker system it drives. Capable of massive current swings, Gryphon Mephisto Solo maintains the dynamic integrity of the audio signal even under the most extreme reactive loudspeaker load conditions. The extraordinary load tolerance of the Mephisto Solo means that it will bring out the best in any loudspeaker.

The inevitable side effects of most monoblocks made by other manufacturers who simply created a bridged version of an existing two-channel product is that it includes doubling distortion, doubling the input impedance (impairing the amplifier’s ability to drive low-impedance loudspeaker loads) and cutting damping factor in half (reducing the amplifier’s control of cone motion at low frequencies).

The Gryphon Mephisto Solo elegantly eliminates these issues by running two stereo channels in parallel (not in series) for unchanged output and voltage, but double the current and half the distortion. As always, extreme high current capability is a fundamental parameter in Gryphon amplifier design. Isolating power amplifier channels in completely independent enclosures offers additional crucial advantages. With separate power supplies, rectifiers, regulation, preamp stages and gain stages, there is no interaction whatsoever between channels. What happens in one channel at any given time (for instance, extreme instantaneous dynamic demands) is entirely independent of and therefore unaffected by anything going on in the other channel.

Total physical separation of the channels eliminates any possibility of inter-channel crosstalk, providing infinite stereo separation.

As a result, the Gryphon Mephisto Solo drives loudspeakers with greater ease, control and authority, delivering a more spacious soundstage in all dimensions, rich detail against a silent background and tighter, more extended bass. Less critically, independent mono amplifiers offer increased flexibility of placement in the listening room.

The quality of sound reproduced by Gryphon Mephisto Solo is completely level-independent. It is a huge amplifier capable of delivering its best at any volume setting, from background levels to full throttle.

Output Current for Gryphon amplifiers

What is the output current of the stereo and mono amplifiers between the different Gryphon amplifiers: Antileon EVO, Colosseum & Mephisto?

Below is the comparison between the different Gryphon Design’s amplifiers. However, please note that if you are comparing with other brands, you MUST compare output current measured under the same conditions, into the same load and same THD figures as Gryphon does not have current limiters in the circuit like some other brands and can draw as much power as need be to measure these figures while other brands probably can’t without tripping some fuses.

Values below are RMS values derived from tech spec on Gryphon’s website. The output current is I = √(P/R)

Output Power (RMS) pro channel:

Mephisto Stereo - 1400W / 1Ohm
Mephisto Solo - 1600W / 1Ohm
Colosseum Stereo - 1250W / 1Ohm
Colosseum Solo - 1450W / 1Ohm
Antileon EVO Stereo - 1200W / 1Ohm
Antileon EVO Mono - 1400W / 1Ohm

Current (RMS):
Mephisto Stereo - = 37,4 A
Mephisto Solo - = 40 A
Colosseum Stereo - = 35,4 A
Colosseum Solo - = 38 A
Antileon EVO Stereo - = 36,6 A
Antileon EVO Mono - = 37,4 A

How many inputs does Legato Legacy have and the different combinations of set ups

How many inputs does Legato Legacy have and the different combinations of set ups

Gryphon does not offer a modification for their Legato for more inputs nor do not they have any plans to add more inputs to the Legato Legacy as a standard feature. In their opinion, the very purist approach is to use one dedicated phono stage for each cartridge. It looks like more than one Legato Legacy Phono Stages can be supplied from one Legato Legacy power supply. For example, looks like you can connect one LL-NPS to the power supply of a LL-SA. However, this requires a custom cable from Gryphon, a “DC-64 cable”.

LL-NPS = Legato Legacy NoPowerSupply = phono stage only
LL-SA = Legato Legacy Stand Alone = phono stage with power supply unit

How many inputs does Gryphon’s preamp, Pandora have?

How many inputs does Gryphon’s preamp, Pandora have?

It has six inputs.
Source selector relays (3 balanced inputs, 2 single-ended, one tape loop). They are also hermetically sealed to prevent the accretion of grime on contact surfaces. You need to know which source equipment of yours is single-ended and which is balanced to find out if this is a fit for your ideal set up and whether Gryphon’s Pandora Preamp offers you the flexibility you need for input hookups.

What is difference between Scorpio and Scorpio S?

What is difference between Scorpio and Scorpio S?

The AKM DAC-chip (AK4397EQ) used in the Scorpio was discontinued. The Scorpio S uses a new AKM DAC-chip (AK4490EQ) The Scorpio S sounds slightly better than the Scorpio (perhaps a little more detailed in the top and slightly tighter at the bottom.

Gryphon does not offer an upgrade from Scorpio to Scorpio S unfortunately.

Gryhon Audio Sonata Allegro with Legato Phono Boards

I am using a Grado Reference cartridge MM. The Legato is set for MM and Ohm board is still set to factory 47k. How can I increase the bias as I have to turn the preamp volume up to the max (38) to get a relatively good listening volume. Would changing the ohms load change the bias or is there some other way to increase the bias. No bias control on the turntable a Well Tempered original.

It is possible to set the Legato to additional 10dB gain in MM-mode. The trick is to set the jumper J1 in MC-mode
(the other jumpers J2, J3, J107 and J108 must remain in MM-mode). The load (input impedance) is fixed at 47k ohm in MM-mode

The highest volume setting on the Sonata Allegro is 44, unless the balance is set to a value different from 00 - or the max volume setting “Lmax” is set to a lower value.

Applies to:

What is the difference between the Artesania Prestige and Exoteryc racks?

I been looking through the spec of the racks to determine the differences between the Prestige and Exoteryc. The significant difference seem to be the stabilizer bar. Is there anything else that separates the two that adds significant value?

Differences between the Prestige & Exoteryc racks:

1. Exoteryc has more weight, lower noise floor.
2. 78% larger construction 3 shelf rack: Prestige 45mm diameter, 62 lb versus Exoteryc 60mm, 110 lb
3. Heavier Dampener for each rack shelf: Standard 3lb versus Improved 5.3lb
4. Decoupling Discs Prestige 3” versus Exoteryc 4”
5. Only the Exoteryc has four stabilizer bars located in the internal structure, they stop the tiniest pendular movement of the internal structure.

Where can I download the Luxman audio player for Windows or Mac?

Where can I download the Luxman audio player for Windows or Mac?

To playback file sound sources by PC or Mac, like lossless compression type FLAC files that are common in online music distribution and DSD format files that are becoming popular these days, it is necessary to install a corresponding playback software. Especially, to play back DSD files, sometimes it requires complexed settings and thus it is making it difficult for people who want to listen to high quality music without any difficulties. LUXMAN developed its original high sound quality playback software ”LUXMAN Audio Player” for its products exclusively. All you need is install the software from the link below or a CD supplied with the product and you will be able to start using it immediately. Corresponding file formats are FLAC/WAV/MP3, DSF/DSDIFF (From ver1.2, ALAC and AIFF became compatible.). You can listen to most of the formats used in major music distributing sites. The interface is simple, and it can be used with both Windows and Mac.
※DA-200 and DA-100 are not compatible with DSD files.
※DA-250 does not come with a software CD.
This Audio Player software can be only used with D-08u/D-06u/D-05u/DA-06/DA-250/DA-200/DA-100. When the other units are connected, it does not operate properly.

Download Luxman Audio Player here.

Where can I download driver software for my Luxman product?

Where can I download current driver software for my Luxman product?

To operate D-08u/D-06u/D-05u/DA-06/DA-250 connected with a Windows PC by a USB cable, installation of dedicated “Windows-ready USB driver” is required. The latest version of “Windows-ready USB driver” can be downloaded from the link below.

Caution on the versions of the driver

  • The driver that can be downloaded from the link below is the software required to operate D-08u/D-06u/D-05u/DA-06/DA-250 connected with a Windows PC as a D/A converter.
  • D-08u/D-06u does not operate with the software older than version of this driver. DA-250 does not operate with the software older than version of this driver. Please install the latest version.
  • If a previous version of the driver is installed in your Windows PC, be sure to uninstall it and newly install the latest version.

※If the latest version of the driver is installed on a Windows PC on which an earlier version of the driver is already installed, the latest version does not operate properly.

Luxman Driver Software for Windows

How to connect Luxman MQ-300 as a mono block

Is it possible to connect the Luxman MQ-300 as a mono block?

As a mono block, the MQ-300 now has twice the output, which is utterly beguiling. See diagram above to learn how it's done.

What should I do if I think my Luxman unit is malfunctioning?

My Luxman unit seems to be malfunctioning. What should I do?

While the unit is used, an unusual phenomenon may be confused as a malfunction for a certain reason. Prior to asking our official sole
distributor of your country for repair services, please check the owner's manual—most Luxman manuals contain a table of common issues and their causes and solutions. Read the operating instructions for any subsidiary devices you are using with the Luxman unit.

If the cause of the malfunction cannot be identified, please contact your dealer. Once we have accepted your request for repair services, inspection fees and traveling expenses may be claimed even though the unit is found to be normal.

How do Luxman’s D-05, D-06u, D-08u and the new D-05u compare?

Are the TD712zMK2 loudspeakers capable of sustaining 100db in my listening room?

I'm interested in the Eclipse TD712zMK2 loudspeakers. My listening room measures 15’x18’x8’. I listen at about 6’ from the speakers and they have to be able to sustain 100db (C weighted) at that distance. Are the TD712zMK2 speakers capable of this in my particular listening environment?

In stereo application, 712zMK2 at 35W input resistance rating does give 98dB at 1.8m distance (103dB at 1m distance), therefore our answer is ‘unlikely’ unless the room is live rather than dead.

The above figure is not considered ‘C weight’ because the dB does not have much difference as the low and high FQ of C weight is beyond the speaker’s reproducing band.

Connecting Merging+NADAC with PC through the RJ45 port

How can I connect Merging+NADAC with my PC through the RJ45? My PC has only one RJ45 port. If I were to install a net card, would it work?

You can connect Merging+NADAC directly to the PC RJ45 port and install the ASIO driver on your PC. If you need to connect your PC to another device with the same port, just use a standard switch. Merging Technologies has a list of recommended switches at

Does the amp still function if tubes for the phono stage are removed for those that only play CDs?

Does the amp still function if tubes for the phono stage are removed for those that only play CDs?

Even if you don't use the phono stage, it is recommended that you don't remove the phono stage. Removing it could result in shortening the product's life. Removing the phono changes the voltages of the other stages.

What is the difference between Luxman’s L-507u and L-507uX?

What is the difference between Luxman's L-507u and L-507uX?

Tonally both amplifiers are voiced the same by Hashimoto-san at Luxman, Yokohama. It is a noticeable improvement over its predecessor, both sonically and in use.


The L-507uX has a sweeter, more liquid mid-range and a more three dimensional soundstage is thrown. It is more refined, more detailed and even nicer to use than before.


Both amps have most of the same features:

• The L-507uX has a discrete volume control based on the C-1000f preamplifier design – no moving parts, no tracking issues at low volume. Much more transparent sounding and will not sound the same at every level. This is the most important of all the upgrades and the most expensive to implement, as the individual resistors need to be measured by hand.

• The L-507uX has MONO, SUBSONIC (Rumble) & LOUDNESS Filter switches on the remote control, Loudness is a wonderful feature for late night, quiet listening. It also has a few buttons that support the D-05/06/08 CD SACD players basic functions.

• The L-507uX has a SEPARATE switch for splitting the preamp section from the amp section, for example the inclusion of a Home Theater Processor, where you use the amp in the L-507uX to drive the front L+R speakrs, but control the volume from the HT Processor.

• The L-507uX has a newly redesigned phono stage, which is both more refined & musical.

• The L-507uX has ODNF 3.0 performs three passes of the audio signal, checking for noise & distortion, while the ODNF 2.1 in the L-507U does two passes.


There are only a few differences between the two amps.

• Both the L-507uX and the L-507u come with a metal remote control.

• The volume control and the selector knobs have a more tactile feel to them.

• The L-507uX has the speaker terminals spread out horizontally to allow easy access for large cable.

• The L-507uX no longer has the Line Phase Sensor – it does not comply with CE regulations..

• The L-507uX now has LINE STRAIGHT (engage / disengage the tone controls) & SEPARATE available on the remote control. There is no excuse for not using the tone controls, especially when they can be engaged / disengaged from the comfort of the listening chair.

Applies to:

How to reinstall a dust cap on a Vivid woofer (C125 driver)

How do I reinstall the dust cap on a woofer (C125 driver)?

Instructions from Vivid creator Laurence Dickie:

"Is the dust cap in good condition? The first line of attack would be to stick it back but you'll need a steady hand to apply the glue! Put the speaker on its back so the driver is facing upwards dead level. Replace the cap in the same place so that any remaining glue fragments key together. Place a circular weight of some sort on the dust cap to hold it in place: you could use a plastic lid from a drink bottle and put a small weight on it say, one or two ounces. Then run a thin fillet of super glue round the join making sure it's all the way round. If you have a fan, keep a gentle breeze going across. This will help prevent a white bloom appearing on the cone. Don't rush to move it. Leave it a couple of hours to be sure it's set."

Luxman L-505uX versus L-550Ax

I'm interested in purchasing an integrated amplifier. What are the key differences between the Luxman L-505uX and the Luxman L-550Ax?

Tonally both amplifiers are voiced the same.


The major difference between the two amps is that one runs in Class A and the other Class AB. The Class A amp runs hotter than Class AB, though not as hot as a similarly powered vacuum tube amp.


The Class A amp (L-550Ax) has a sweeter, more liquid mid-range and a more three dimensional soundstage is thrown; better suited to more neutral, resolving speakers.. While the Class AB amp (L-505uX) has slightly better defined & more articulate bass and is a little more dynamic; better suited to darker sounding speakers. In reality there is not a lot of differences between the two power output wise—the L-505uX is slightly more powerful, but not dramatically so; we are talking about a 1dB difference.


Both amps have the same features:

  • Both have almost the same internal build quality.
  • The L-550Ax & the L-505uX have MONO, SUBSONIC & LOUDNESS Filter switch on the remote control. Though the L-550uX does not actually have the MONO feature. Loudness is a wonderful feature for late night, quiet listening. It also has a few buttons that support the D-05/06/08 CD SACD players basic functions.
  • The L-550Ax & the L-505uX have a SEPARATE switch for splitting the preamp section from the amp section, for example the inclusion of a Home Theater Processor, where you use the amp in the L-505uX to drive the front L + R speakers, but control the volume from the HT Processor.
  • The L-550Ax & the L-505uX both have one balanced input.
  • The L-550Ax & the L-505uX both have a newly redesigned phono stage.
  • The L-550Ax & the L-505uX have a discrete volume control based on the C-1000f preamplifier – no moving parts, no tracking issues at low volume. Much more transparent sounding.
  • The L-550Ax & the L-505uX have ODNF 3.0 performs three passes of the audio signal, checking for noise & distortion, while the ODNF 2.1 in the older L-505u does two passes.


There are only a few differences between the two amps:

  • The L-550Ax has a beveled Lucite cover in front of the meters; the L-505uX has a simple plastic recessed cover over the meters.
  • The L-550Ax has yellow meters; the L-505u has blue meters.
  • The L-550Ax does run considerably warmer than the L-505u, if heat is a consideration then the L-505u would be a better choice, such as an amplifier stored in a closed cabinet.

The final decision should probably take into consideration which speakers you are using, the acoustics of your listening room and what kind of music you are going to listen to.

In Music,
Philip O'Hanlon

Luxman L-505uX versus L-507uX

I'm interested in purchasing an integrated amplifier. What are the key differences between the Luxman L-505uX and the Luxman L-507uX?

Both amplifiers come with a remote control. The principal difference between the two amps is in the refinement. The difference in sound quality between the two is dramatic and is heard in tonal color, texture, depth and width of sound stage. The L-507uX's refinement is not subtle, considerably more resolute & delivers much more tonal color and dynamics than the L-505uX.

The L-507uX uses a more powerful power supply than the L-505uX with the ability to drive lower impedance loads. You will find that the power output difference into 8 ohms is inconsequential. However, into 4 ohms, the L-507uX is considerably more stable and powerful into low impedance loads.

From a value standpoint, while the L-505uX is clearly the better value from a dollar standpoint, the L-507uX is dramatically better sounding and truly delivers high-end separate performance. The L-507uX uses higher quality parts internally, nicer casework and as a result is over 4 lbs heavier.

One of the main differences is in the transformers:

  • First off, it is safe to say that the Japanese build some of the best transformers and Luxman has been designing/winding transformers since 1925 and has a very good handle on these devices.
  • The El transformers in the L-507uX are more expensive to produce than the Toroidals in the L-505uX. They are also more time-consuming to make because of bobbins and the need to optimize winding space. Toroidals weigh about half of what El transformers weigh for the same VA rating.
  • Since Toroidals have extremely good high frequency response, they may let more line noise through. They often have a high in-rush current (can be hard on power switches) and they can be disturbed by the tiniest bit of DC on the power lines.

In Music,
Philip O'Hanlon

Luxman L-550AX versus Luxman L-590AX

I'm interested in purchasing an integrated amplifier. What are the key differences between the Luxman L-550AX and the Luxman L-590AX?

The L-590AX is a fully balanced design, while the L-550AX is a single-ended design. Balanced is normally quieter.

  • The L-590AX has two balanced inputs instead of one in the L-550AX.
  • The L-590AX has a slightly nicer chassis than the L-550AX, but the money has gone into the actual electronics, not a prettier box. Its almost 10 lbs heavier as a result.
  • Output power is increased by 50% and is sufficient to drive Vivid Audio GIYA G3, Wilson Sasha or Alexia.
  • Sonically the L-590AX is dramatically more refined than the L-550AX form the point of view of tonal color, texture. The L-590AX is quieter, more dynamic & more resolute. The soundstage is wider, deeper and more three-dimensional.

During casual conversation with dealers, many have offered up, unsolicited, that if they left the industry, they would buy an L-590AX for themselves and not bother upgrading going forward.

The L590AX is truly High End at an affordable price.

In Music,
Philip O'Hanlon

What are the differences between the Luxman L-590AX and the new Luxman L-590AXII?

What are the differences between the Luxman L-590AX and the new Luxman L-590AXII?

Differences between Luxman L-590AX and L-590AXII
LECUA 88 steps 88 steps The construction of LECUA itself is the same, but an FET buffer before LECUA was replaced by a transistor buffer. Therefore S/N is improved and so is the distortion.
ODNF 3.0A 4.0 Distortion characteristic of the high range is improved. The expression is clearer.
POWER 10000μF×4 (LR common) 10000μF×8 (LR independent) The first capacitors have been doubled (4 → 8) and LR becomes independent. Thus the intereference between L and R is decreased and separation is improved. The same construction as M-700u.
TRANSFORMER EI type 640VA EI type 640VA thicker primary winding Regulation is improved and more powerful expressive power for the low range is realized.The voltage on the power transistor is higher and the power consumption is a little higher.
PRE OUTPUT Operational amp Operationalamp

+Discrete buffer amp

Output impedance is decreased and the driving force of preamp is improved. Thus more speedy low range is possible and the sound rise is faster.
ORIGINAL CONDENSER PPSD,PPSO Improved version of PPSD, PPSO Property variation by the temperature shift is rare and the durability is high. Newly added the vibration protections decreased the sound chokes. The capacity of the condenser is optimized. The supplier was changed.
DUMPING FACTOR 240 320 This increase is not due to negative feed back. The impedance of the signal path is decreased. (The inside wiring of the main part is 260% thicker.)
METER Reaction speed a little slow Reaction speed increased Design around the meter is changed.
LEG Silver Black Same material and gradation cast iron.
SOUND QUALITY The performance stage wider and bigger scale-feeling. Increased feel of tranquility and the sounding and the afterglow are more vivid. The low range has more strength and energy. LUXMAN's integrated amplifier's flagship. We put into know-hows that we acquired from separate amplifiers' development. Being a pure A-class amplifier, we did not put so much emphasis to make it sound like "A-class," the expressive power with high density is alive.

What is the Merging NADAC’s output impedance?

What is the NADAC's output impedance?

The NADAC-MC8's Output impedance is of 90 Ohms (Differential), equivalent to 45 Ohms (Single-ended) in 8 channel mode and about 53 Ohms (Differential), equivalent to 26.5 Ohms (Single-ended) in Stereo mode.

The NADAC-ST2's Output impedance is always of 90 Ohms (Differential), equivalent to 45 Ohms (Single-ended).

In terms of feeding power amps directly from the Merging NADAC, what would be the lower limit of impedance it can drive?

In terms of feeding power amps directly from the NADAC, what would be the lower limit of impedance it can drive?

Merging has tested it to work (at full specs) down to 300 Ohms (with Audio Precision) but it can even drive loads with a much lower impedance than that. We've had reports that it can even drive a zero Ohm load (equivalent to a short circuit) when set to +12 dBu (Low) and within about 1 dB of full scale output when set to 18 dBu (High).

Can the Merging NADAC DA outputs be calibrated independently, per channel?

Can the NADAC DA outputs be calibrated independently, per channel?

Yes this is possible from the NADAC Trim/Polarity option located under the Main menu. The Trim levels are individual and can be used for calibration (e.g. for a Surround setup). Note that the Trim Level settings are carried in Digital form.

How is the Merging NADAC Main max level option handled in the System Menu?

How is the NADAC Main max level option handled in the System Menu?

The Main Max Output Level setting option is carried in Analog form:

  • High = + 18 dBu (on XLR balanced output), + 8 dBu (on RCA Unbalanced output)
  • Low = + 12 dBu (on XLR balanced output), + 2 dBu (on RCA Unbalanced output)

Can Merging NADAC Main outputs and Headphone play files at different sampling rates ?

Can NADAC Main outputs and Headphone play files at different sampling rates ?

No, NADAC can only handle one sampling rate at a time. All outputs have to run at the same sampling rate.

What is the maximum length of the network cable for Merging NADAC?

What is the maximum length of the network cable?

100 meters - 328 ft for CAT5E or CAT6 cables.

Users with a need to extend their connections beyond 100 meters may take advantage of copper to fiber converters, which further extend the reach to 650 meters with multi-mode fibers and even several kilometers with single-mode fibers.

Which network cable can I use with Merging NADAC?

Which network cable can I use with NADAC?

CAT5E, CAT6 or higher copper cable, unshielded.

Is Merging NADAC compatible with any network switch or router?

Is NADAC compatible with any network switch or router?

NADAC uses the RAVENNA protocol, which is an open standard for real-time media over IP. As such it can be deployed on any Ethernet Network, be it 10 Mbits, 100 Mbits or 1 Gigabit based.
However in order to provide adequate bandwidth for High channel count upto and including the ultra high sampling rates offered by NADAC, Merging requires switches capable of handling 1GbE connections. Furthermore the performance of a RAVENNA system improves with the quality of the network infrastructure, so it is highly recommended to use Managed switches with the capacity to be configured adequately for QoS (Quality of Service).

Is Merging NADAC compatible with DLNA and UPnP devices?

Is NADAC compatible with DLNA and UPnP devices?

NADAC is not a uPnP or DLNA enabled device, it requires drivers to be installed on connected computers to communicate with it. Both ASIO driver for Windows and CoreAudio driver for MacOS are available here. Once installed NADAC will behave like any USB DAC, with all the advantages of Ethernet Networking in addition.

Is the one balanced input on my L-550AX is a true balanced input circuit or simply a balanced jack?

Is the one balanced input on my L-550AX is a true balanced input circuit or simply a balanced jack? Wondering if it is better to run single ended or the balanced jack as my source is the Bricasti M1 which can be run fully balanced or single ended.

The L-550AX is not fully balanced, so the balanced input has a balancing transformer. For the best sound quality, you are probably better off using the single ended inputs. Unless you have an input far away from the amplifier.

Replacing the Tubes on the Luxman SQ-N10

You told me, if you change tubes on the SQ-N10 sound quality would improve a lot. Just to be sure, would you please let me know which tube(s) should be changed and which tubes you recommend as replacement? I think it was Telefunken, but I´m not sure.

As regards the SQ-N10; if you find a well balanced Telefunnken ECC83 in great condition at a reasonable price - first choice. If you have to buy modern, then consider the Genelex - "Gold Lion”. The ECC83 is the single tube in the middle in the front row.

I bought a complete set of the Genelex “Gold Lion” for the Luxman EQ-500, which is due to arrive in California, tomorrow Thursday. I hope this is of help; will definitely bring this fine amplifier into another league; more refined tonal colour / density. Can help it sound as if it were twice the Euros.

Hard reset for Luxman L-550AX

My L-550AX will not turn ON and will not come out of stand-by mode. Please advise on any simple repairs.

Please try memory reset as follows.

1. Power off

2. Press the operation switch for over 5 seconds and while keeping pressing, please press line straight switch once.

3. No.2 operation will turn the unit off.

The memory reset is done.

(Details in the owner's manual in the Docs tab of the L-550AX product page.)

Try the above and still the unit does not turn on, the protection circuit is in operation. Please check the heat, over DC and DC drift.

Is it possible to listen to LPs on the Makua preamp AND digitally record them to a music server at the same time?

I have a question about Mola-Mola preamp. Does it have tape out? Specifically, I want to be able to listen to LPs AND digitally record them to my music server at the same time...

Thank you for enquiring about the Mola-Mola "Makua" preamp. As regards your question about the Tape Output; I myself have been recording the output from the Makua internal phono stage and taking the preamp output into a Grimm AD1 (Analogue / Digital Converter) and then taking the Grimm's output into a Tascam DV3000 audio recorder. I adjusted the output from the preamp & listened on headphones to the Tascam so that I could optimize the gain. The Mola Makua is so quiet that it did not add any audible noise to the output signal. In fact, these vinyl rips to DSD sound absolutely fantastic.

You will not be able to play the LP through the system & record to digital at the same time, unless you are not concerned about the sonic quality, as you want to avoid a feedback loop.

To digitally record your LPs, you will need:

1. an analogue digital converter

2. some audio recorder, the KORG MR2000 or Tascam DV3000 both have pretty decent ADC's on board.

3. editing software for the music - KORG's ""Audiogate is superb for DSD (PC or MAC) or Vinyl Studio for PCM

The Luxman C-600f and C700f both have tape outputs, but of course are quite different sounding from the Mola-Mola.

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Linear versus Switching PSU in Mola-Mola Kaluga

What are the differences between the Kaluga and the Theta Prometheus?

A. In brief:

1. Lowest distortion input stage. Not available as an OEM component from Hypex.

2. nCore 1200 module with much higher quality components, selected by Bruno for their sonic qualities. Not available as an OEM component from Hypex

3. Switching power supply developed especially for Mola-Mola. Not available as an OEM component from Hypex

In full (from Bruno Putzeys):

The power amp module in the Mola-Mola amps is not strictly the NC1200. You may remember we sat down together to tweak a few parts and the improvement was not subtle. Based on those changes I made a new module specifically for the Kalugas. Also the input stage is a completely different affair. The one in the Kalugas is the same as in the Makua and is not available to anyone else. It has the lowest distortion I've ever seen on a buffer stage, and more importantly the most linear input impedance. This means it's much more forgiving towards the source impedance.

Regarding the supplies, the proof is printed black on white in fig 4. in the Stereophile review of the Prometheus. Those 60Hz related components are simply nonexistent in the Kalugas. The most likely cause of those in the Thetas is the big toroidal transformer combined with the big capacitor tank and the rectifiers + associated wiring putting out a stray field. It's often said that toroids don't have a stray field. They do, and it's located where the wires come out. The field you get there is very nasty, consisting of 60Hz harmonics going all the way up into the kHz region. It's so strong that it is easily picked up by the speaker wiring so the amp output could be clean and you'd still get a buzz in the speaker as a result of the few inches of wire between the amp module and the chassis.

The kalugas have no discernible hum or buzz and the construction of the power supply is part of the reason (the internal wiring explains the rest). Because of the fact that rectification happens on the primary side, currents are smaller. Also, for the same amount of energy storage the capacitors are physically much smaller so you can do a circuit board layout that has minimal current loops. The power transformer is run at 100kHz meaning it too can be smaller and its stray field (which contains no 60Hz related component!) is very easily shielded.

The designer of the SMPS has also done a custom job for Manley for microphone preamplifiers. When the people there realized that suddenly all the hum and buzz they'd been fighting for years was completely gone they went ape. It's really strange how lay people (especially those trained in the art of audiophilia by their peers who write for audio magazines) seem to think that switching power supplies are noisy. They're not. Given half a chance they're much quieter. All you need to take care about is of course the 100kHz and associated harmonics. Once I had that down the SMPS sounded much better than the big iron and copper affair that's incorrectly known as a "linear supply".



Applies to:

I heard you have to wait 45 minutes for tube amps to warm up before they can play. Is this true?

I am interested in the Luxman SQ-N10 tube amp and the matching CD player. However, I have been told that you have to wait about 45 minutes for tube amps to warm up before you can play them. Is this true?

The tube amp takes one minute to power up and you can listen to music then. It will take an additional twenty minutes to fully stabilize & reach its optimum sound performance.

How do I open the driver I downloaded from the Specs tab on the TD-M1 product page?

How do I open the driver I downloaded from the Specs tab on the product page?

To open the driver on the Specs tab after you've downloaded it, you'll need to have WinZip installed on your computer. If you don't already have WinZip, you can download a free trial of the software here.

Is it normal for the LED to be off during operation of the SQ-N10?

On the SQ-N100 the volume control had a LED inside the volume control that always showed you where the volume was set. With the SQ-N10 when the unit is powering up, the LED blinks and then shuts off when the unit is powered up. The LED also blinks when you hit mute. Is the LED supposed to be on / illuminated in normal operation?

It is MUTE operation at the first 30 seconds when the unit is powering up, during MUTE operation, LED blinks. After 30 seconds, LED shuts off and the unit works normal. So in MUTE operation the LED blinks, while in normal operation LED shuts off.

Are the pre outs on the Luxman L-505uX always hot or do they only turn on when the separate function is engaged?

Are the pre outs on the L-505uX always hot or do they only turn on when the separate function is engaged? The reason I’m asking is I have a prospective client who is interested in the L-505uX and wants to use his subwoofer with it. If the output is not always active, I assume I can split the signal with a Y adapter and send the signal to both the sub and the main in.

The PRE out is always hot.

Eclipse TD-M1 Firmware Update Failed/Hard Reset

I tried to do the firmware update (to 1.10 from 1.0). Although the file downloaded properly the eclipse said the file was invalid. However it will not leave the mode it was in after rebooting; the white indicator is flashing and I cannot connect to it over bonjour. I am reluctant to turn off the power. Can you suggest a way to salvage this unit?

On first viewing, you are correct to try and avoid powering down. Have you tried a ‘hard reset’ on the system? This involves holding the Power, Down volume and Up volume buttons at the same time for approx. 3 - 5 secs. It is a little tricky (deliberately so, to avoid mistakenly doing it), but I find a combination of thumb of left hand and thumb + middle finger of right hand should do the job. This then resets everything and should set the indicator light back to Green.

To be or not to be? Do we need a music server or are there easier and better options?

I own a Luxman L-590AX amplifier and it sounds terrific. I like it very much…. I am considering an upgrade (of my CD player) to the Luxman D-05… In the April issue of The Absolute Sound, Mark Waldrep, President of AIX Records states on page 160 that “delivering music on physical discs is over.” He believes the future is in digital downloads tailored to the individual listener. I experimented once … and did not like the way it sounded… Does Luxman, or any of the other brands you carry, have a music server product that supports a high quality digital download as noted by Mr. Waldrep? … I am very interested in hearing your comments and suggestions. – Howard G

I personally listen to music in all formats and have long embraced the SACD format with the rest of the audiophile community as my go-to medium for high quality digital music playback, boasting a collection of well over 1,000 SACD albums. For music labels, digital downloads give their music a new lease of life. Of particular attention are the DSD files now being made available to download. The DSD Master sounds better (richer & fuller) than the DSD file ripped from the SACD, however, they are usually more expensive than the physical SACD.

The digital revolution benefits music lovers like us as it increases accessibility and variety for our indulgence, but I would not go so far as to say that physical discs are finished. Just to illustrate, Acoustic Sounds show 31 recent SACD releases while they show 116 titles coming soon.

To answer your question, sonically and practically speaking, you really don’t need to buy a dedicated music server per se, but something as simple as a MAC Mini and install Audirvana, then hook up a hard drive to it. You can take the digital audio output via USB to the D-05 or D-06.

We supply a LUXMAN U-100R (USB / SPDIF converter) free of charge with the D-05, D-06 & D-08. This way you can spin CDs & SACDs and hook up a music server whenever the urge takes you. To top it off, Luxman is bringing to the North American market a high resolution DAC (DA-06 – retail $6,000) that is DSD compatible in a few months time and its terrific sounding. The DA-06 is built upon the D-06 platform, minus the transport mechanism. But of course, it will not play any discs, only music files.

I am conducting music seminars around North America with this equipment and other latest components. Drop by to see us or inquire for a dealer near you.

Applies to: