Musetec (LKS) MH-DA005 DAC

Always comes down to a very simple question. Who is one trying to please, measuring bot or oneself?

I have Merlin VSM-MM as second speakers, I purchased based on a number of listening sessions at audio shows and speaking with Bobby. Yes, Bobby generally partnered with Ars Sonum, and I did find pairing alluring. Bobby chose this pairing based on his listening preferences, measurements played role in that he understood what was required of partnering amp. Virtually any solid state, push pull tube could adequately power the Merlins, Bobby chose Ars Sonum based on subjective listening tests.

And speaking of capacitors and ability to hear differences with this particular part exchange. Merlins originally came with Hovland caps in both speaker crossover and BAM, I was perhaps first to mod VSM with Duelund VSF caps. Result was far more natural timbre, greater transparency, resolving powers. I called Bobby with great enthusiasm for mod, Bobby not too happy with me, but could detect a fair amount of curiosity in regard to mod. And so, a few months later, Bobby comes out with new iteration of VMS with Duelund VSF caps!  Point of this is, some are very familiar with certain sound qualities of systems and/or components, small changes can be extremely salient with this level of familiarity. These are not differences you're going to hear in double blind tests or short term listening with just a few recordings. Long term listening with wide variety of recordings in static setup required to detect these differences.

Musetec used above method to arrive at final sound qualities of 005, designer and/or designers used their ears and sonic preferences in voicing this dac. Assume measurements sacrificed for particular sound qualities.

Lastly, I would hope every designer of quality audio components has at least one audio system, preferable a number of them to voice those components. And the quality of that system, and the sonic preferences of designer certainly play a great role in final voicing. When preferences of designer and listener align we have sympathetic match!

Measuring bots and I not sympathetic match!

I spoke with Bobby a few times about his speakers - super nice guy. Apparently, massed choir was his passion. Which brings me to your point about voicing. I recently decided to learn some basics about audio, purchased a UMIK, and started making measurements- including simulated anechoic, on axis, off axis... My Merlin VSM-MXM have a clear 4-7db hump from about 700-1000 hz. With a lot of experimentation, I was able to create a reliable convolution filter that yields a smooth harman-like frequency response at the listening position (and emulates the BAM digitally so I could remove this). The filter - to my ears - is a real improvement - but the amount of improvement varies by music type. And one type of music actually seems to sound best (to me) without any correction: massed voices. As I hear it, goosing up the 700-1000hz region gives multiple singers a more "spread out" presentation. 

For this, and other reasons, I more skeptical than you about audio designers being able to reliably pull off the trick of voicing.

as I have already stated, the MUSETEC has been inserted in a pure class A Gryphon system (https://gryphon-audio.dk) at my trusted dealer (https://www.evoluzionehifi.it/).

it was compared for about two months with all the DACs present as a demo in the store (as mentioned, from the NAGRA HD DAC X, to the dCS Vivaldi APEX DAC) plus some Topping DACs bought for fun (DX7Pro and DX7Pro +).

I have already expressed the results of the comparison

has any of you had the opportunity to test MUSETEC on a better system?

do you know any system, better than the one we use, which operates in pure class A and which is such as to allow you to appreciate the (sometimes significant) differences between the different sources?

I am willing to welcome feedback from anyone who can test the MH-DA005 in a better system than the one we are using

just for fun ..

Pure Class A

True Class A operation has always been a Gryphon hallmark. Why? Because no other circuit topology can match the sonic perfection of pure Class A. Unfortunately, true Class A is even rarer today than when we introduced the legendary DM100 in 1991. Rising consumer awareness has forced some manufacturers to make outrageous, unsubstantiated claims of Class A power ratings that have more to do with marketing than technology. There are a growing number of so-called “new” Class A topologies based on automatic biasing which supposedly allow the amplifier to sense when the bias should increase to ensure constant Class A performance!

Put bluntly, you can’t cheat physics. There are no engineering shortcuts when it comes to pure Class A, so we repeat with no apologies: TRUE, PURE CLASS A means heavy transformers, very large heatsinks, large quantities of expensive parts and costly assembly. While we appreciate and endorse every effort to conserve energy and preserve our global resources, our research into efforts to obtain Class A performance from class A/B topologies makes it clear that there simply is no substitute for the sheer magic of pure Class A.

However, based on thorough analysis of typical listening situations, we have invented “Green Bias” (“Green” for reduced environmental impact). Green Bias offers TRUE, PURE CLASS A with considerably lower power consumption than traditional solutions.
Green bias in the new Gryphon Apex allows the user to select the amount of Class A required to run his speakers fully in Class A at any given time, encompassing such factors as speaker sensitivity, room size, musical dynamics and overall volume level. Green bias improves on our programmable bias by giving Gryphon’s fortunate system owners the option of letting the preamplifier automatically control bias.

While Green bias does not match the extreme low power consumption of Class A/B, or even the low power consumption of misleading “auto-biasing” systems, it does offer significantly lower power consumption without sacrifice or compromise. PURE CLASS A performance is guaranteed! Apex users who own legacy Gryphon preamplifiers lacking Green Bias can access the programmable bias system manually via the Apex front panel.

The whole point of voicing is inherently subjective, either manufacturer and you sympathetic or not. Bobby wasn't trying to voice Merlins to appeal to every listener, no universal voicing for the masses. Above also may apply to specific genre of music a component or system works best with. VSM is particularly sensitive to this issue as lower bass simply missing in action.

Again, voicing is based on long term listening with variety of music in static system.