All, we had the second iteration of music server shootout this weekend, in the first iteration Everest easily bested Innous Statement and Grimm MU1.
For the second iteration we had Antipodes K50 pitted against Extreme - Qobuz as source, leveraging the recommended interfaces meaning AES and Jorma cable for K50 and for Taiko USB and Shunyata Omegas cable, both connected to MSB Premier which in turn linked into a Audio Analogue ABsolute running in class A, speakers where Marten Parker Trio Diamond Edition hooked up via Shunyata Alpha v2 speaker cable. Ethernet cables as well as power cables also Shunyata.
Shunyata power cables hooked up to an Everest - we tried out different grounding approaches - see below.
We used two switches to feed into the servers - a standard Innous PhenixNET and a modified one - additional network filter and some other tweaks.
Software setup was initially Roon server + player and then also TAS for Extreme. (K50 recommends HQ Player as player but we did not have a license - K50 can probably increase SQ somewhat above what we heard.)
K50 sounded really good - better than the candidates that was part of iteration one (i.e. Innous Statement and Grimm MU1).
But Extreme running Roon was clearly better than the K50 - as expected, there is a price difference of 10 000 US $ between the products.
But - being second behind Extreme is a very good position, it seems that a lot of design philosophies are shared between K50 and Extreme when looking at their website.
Next - we did A/B/A with the switches - we already concluded during iteration one that Extreme sounded better with a standard PhoenixNet in the chain than without it (Extreme has the new USB Card installed and in use). With the modded PhoenixNet SQ improved further - not a lot, but difference was clearly perceived, so although very well designed and well built the PhoenixNet can be improved. We also tested K50 with the modded PhoenixNet and the increase in SQ was relatively bigger compared with Extreme improvement leading to the conclusion that Extreme is better insulated against upstream network nasties - although of course not immune. (It will be interesting to repeat this test once the network + switch card is available.)
Then we switched Extreme from Roon to TAS.
Wow! Air, space, dynamics - everything fell into place on a higher level than before - mindblowingly good!
This was by far the biggest change in SQ.
Lastly, we tested the effects of grounding. All along the above tests we had the following in place:
- All cables are cheap/standard cables fitted with spades in one end and open cable in other end
- Grounding cable from MSB -> Audio Analogue ABsolute
- Grounding cable from Audio Analogue ABsolute -> Everest grounding lug
- Grounding cable from Extreme grounding lug -> Everest grounding lug
- Grounding cable from PhoenixNet chassi -> Everest grounding lug
First test - disconnect all cables except between MSB and Audio Analogue ABsolute. Result was a clear decrease in SQ - loss of details and air most likely due to increased noise from grounding issues.
Second test - use special grounding cables from Entreq, these are pure silver and specifically designed for grounding (
https://www.entreq.com/products/eartha-cables-17667932) so cable 3 and 4 was replaced. Result was a clear increase in SQ.
Conclusion:
- Extreme is the King of the Hill! But SW is key - TAS is huge improvement over Roon! With continued vertical integration across HW and SW we will get to audio nirvana - step by step
- Switch still matters
- Grounding matters - as does the cables used to implement grounding
Best of all - during the shootout I got confirmation that my Extreme is landing at dealer's Tuesday next week ->
Wednesday | Thursday I'll be listening to it!