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Actually very easy, remove four screws on bottem, slide top off.... Unlike t.ex the Meridian DACmagic, had to use google to figure that one out.... And easy to assemble during manufacturing, with no visible screws....

Nice case design... Exactly like what I have been using since my dac1541 from 2017....

6moons charge for their "reviews", I doubt they can get anybody to pay for a bad one....

It even violates the USB spec for downstream capacitance, the spec says max 10 uF and I can see what looks like two 820 uF capacitors.... What looks like flux might be some missguided attempt at conformal coating....

What a set of Monitors, do all things correct: 3 way, with dome center and high - check Analog crossovers and class AB Amplifiers - check Switch Mode power supply - check Balanced input to match my new dac2541 - check No digital stuff or DSP - check Now on my shortlist when I decide to...

Hi Amir: Next of things to test, Those Audiophile Rated Fuses.... Or maybe those exotic Power Cables. All being promoted while ignoring the effects of the cabling from the Wall Outlet all the way back to the Power Station....

Looks like they use regular opamps.... But to me it looks like they have a problem concentrating the positive and negative parts of the two R2R networks used for the Sign Magnitude DAC, they seems to do it not very smart.... I can easily get distortion below 0.01%, raising very little with...

Yes, even as Massdrop claim otherwise, they copied their design from a chinese guy, see thread at: https://drop.com/buy/massdrop-x-airist-audio-r-2r-dac/talk/2098625#imagecarousel That chinese person actually got inspired from my dam1021 module launched in 2014, nothing wrong with getting...

There is nothing special about R-2R DACs that require any special treatment, in this case here is more the NOS type with its aliasing products that create problems. As a manufacturer of discrete R-2R DACs, I still want my DACs to measure ok, otherwise there is something wrong.... You just need...

The TotalDAC is a NOS (Non Over Sampling) DAC, which per definition have a small high frequency roll-off. The FIR filter is there to compensate for that roll-off, apparently not doing a good job....

No, Putzey's is self oscillating, also most common nowadays, Sony's is PWM with Comparator. A new Danish company is apperently taking it to the next level, see https://www.audioxpress.com/news/purifi-audio-promises-to-reduce-distortion-in-speakers-and-amplifiers, have some well known people...

As I said: It is possible to design amplifier circuit with low distortion without using negative feedback, just not that easy.... Ayre need to rework their design, no negative feedback by itself is not a bad thing. You can get far with a lots of feedback, just be aware that your typical audio...

I need to voice my opinion, although I'm biased.... Yes, there is a lot of snake oil in the Audio Business, I'm not going to pay more for my speaker cables than my speakers, 2.5mm2 stranded wires are fine. And those that believe in "audio grade" fuses, I would like to sell the eiffel tower...

I2S over whatever cable/connector is a nonstandard interface, but it can be better over substandard SPDIF interfaces, like those using just a chip receiver with its typical 50 pS jitter.... For DACs with advanced reclocking/buffering, like mine, it will be inferior and therefore useless.... I...

Audio-GD and me are probably saying the same thing using different words.... It's the implementation they have problems with, they also use an ESS chip so they need additional stages for the current to voltage converter and filter stage, those additional stages also adds distortion....

Correct, our line of audiophile DACs, the dac1321, dac1421 and dac1541, all have output amplifiers with no negative feedback at all. It's all about the implementation, with careful design you can make some simple and very linear amplifiers.... Our R-2R DAC core is voltage out, we don't need any...

I would be more worried about the PCB designer who flooded a top side plane without observing the 3mm insulation distance (if a class I device) to mains power.... And although the used power connector seems to have its ground pin going down to the PCB, that's not enough according to EU rules...

That's ok, I have plenty of other customers that have sent me very happy emails, love getting those to confirm the hard work is not wasted.

With current methods and equipment you can only measure a limited set of basic characteristics, then you need to switch to a much more sensitive method, the human hearing using music.... Unfortunate that require good ears, patience and time, so some prefer to stay with what measurement equipment...

DonH56 explain it better than I could.... I also believe that simpler designs wins, and a R-2R DAC is simple, parallel bits in, audio out, no processing, that's it. While a DS DAC have a lot of processing to get something usefull out of those 1-5 bits.... Of course a great DS design can beat a...