Concerning the TH900 with PureDAC/UltraDAC   Sometimes headphones seem hard to drive although their efficiency is nice. Some top headphones like the Beyer Tesla series or most extreme the Fostex TH900 have a very strong magnetic motor. Basically this is a good thing, but as a consequence the...

A PureDAC update: The specifications of the PureDAC changed quite a lot since we lauched the MK2 version in October 2015. - The unbalanced headphone output got its own amplification trunk and has been vastly improved. - The SPDIF inputs cover are less sensitive to cheap sources with frequecy...

Really happy you enjoy the PureDAC!   Well, as long as humans are doing the work sometimes mistakes will happen. This is fortunately not a big one. UltraDAC and PureAmp are already coming with a different remote control, serving amp and DAC.

Hi Priidik,   Concerning sound quality you wouldn't have to worry. One advantage of LEF amplifiers is that the voltage output source is always small and in your case the current sources would be almost jobless.   The problem is the missing ground when using a 4-pin XLR connector. Unless your...

Thanks for the very nice words!   The line output has a 22Ohm output impedance and can handle up to 300mA output current, which should be more than sufficient for a line output. Generally the 13V can't be digested by any amplifier input and are rather a gain headroom for low level recordings...

... It sais: 13V rms even at 32 Ohms which would be 5.28W and definitely would break your headphone. A milliohm output wouldn't have any mercy with the headphone's voice coil. For this purpose a current limiter has been implemented. In case of LEF amplifiers this implementation won't have any...

...and more. That's what a website is for.

This comment really means a lot to me! At the end, behind any brand there are just people, hopefully with a good mix of knowledge, passion and discipline. No3 is easy said...

Hi everybody. Most of the question you already figured out yourselves.   - First of all, we produce every model in-house! With another "hand" in-between we couldn't keep the PureDAC price.   - For a new PureDAC version, we can have an upgrade path. But again this depends on the structure of...

Since we don't have a "MK1 to MK2 situation", what you are suggesting is not an upgrade rather than a trade-in offer; kind of an exchange price.

...but what if an upgrade is simply not possible without actually changing everything inside? What you felt is not necessarily fair! How many companies allow you a cross change between their models for update conditions? If we would charge insane margins we could be very generous, but then you...

Thanks for being interested!   a1uc: When making a new model based on a concept of a lower grade model we first of all have to decide where changes would deliver the biggest improvement. Generally we try to avoid "politics" so if the DAC chip isn't an important issue, it is just not on this...

DAC1 was designed before the DSD hype. DSD pretty much limited the chipsets that can be used in a DAC, since too many guys would refuse to buy a DAC without, or with limited DSD support. As a matter of fact a DXD file (without leftover noise garbage which can be easily removed) with...

Dear Folks,   Thanks again for all your support and nice descriptions of the PureDAC!   The conclusion of most reviews is that with either (a lot?) extra money, twaekings... you may have one or another advantage against the PureDAC , but in the sum of all... Again thanks!   Carlos

Hello,   Let's clarify some mixed up issues here:   USB handshake There are 2 reasons this could fail:     a. The driver version conflicts with your Windows version.     b. You have AC power grounding issues, putting a lot of noise on your ground. Generally we do not have any negative...

Hi Guido,   First of all .dsf or .dff is a question of the playback software only, but not the DAC. Audirvana should play both properly. Settings: - Preferred Audio device should be "XMOS USB 2.0 Audio Out" - Native DSD compatibility should be "DSD over PCM". This term is not related to any...

Hello,   It seems you found more than what you were looking for . I once started with a top headphone and an open-reel tape recorder (sorry no USB audio then). But visits to some shows and good dealer demos let me realize that it is possible to reallyenjoy music at home. Nowadays it is not...

In Portland it should be http://www.trueaudiophile.com. A very nice guy and true music lover. I got badly sick at CES and he helped from the first day until the show cleanup!

Didn't know that , welcome to the club!   For you a slighty different explanation would have matched better of course, but I assume there are more readers around here. The analogy using something everybody understands really helps and it fits to the true problem. We used that many times for...

Hi Chris, Hopefully I can help clarifying. I believe there are 2 points which should not be mixed up, to be clarified.   1. The mentioned output specification suggests there is an headphone amplifier, but then I mentioned not to need an amplifier is an achievement.   At the analog domain...

Somebody mentioned an AT L3000 headphone (the leatherhead)? I have one for sale, with 4-pin balanced plug. Looks like new.

Some information about pre-announcements: Generally we need a production schedule for offically announcing a product. Once a development is closed we prepare a pre-production and announce the product. The pre-production is actually a ready product simulating the mass production and also the...

A little background about the headphone stage of the PureDAC: First of all it delivers up to 13Vrms and a current not less than any other headphone amp. There is nothing a headphone amp is delivering differently, beside of course, individual sound flavours depending on the product. In addition...

Hi, In the bay area it would be Audio Vision SF. A very active online dealer would be Moon Audio   Beside that: Thanks so much for the really nice feedback! We are now close to finish the PureAmp and surely won't run out of ideas.

Bom dia Leonardo! Thanks for the nice and detailed review!   Some suggestion you may try: All tendencies you described we know to be related to the Mac playback which we consider still inferior to what Widows and Linux deliver. An exception is Audirvana Plus, that tends to be not midrange...