Absolutely compelling, this years must read:-
Purité Audio’s BLOG!
The new Eversolo DMP A-8 was introduced earlier this month, I have now had the opportunity to compare all three Eversolo streamers the A-6, the A-6 'Master' and the new A-8.Audio Science Review has measured the standard DMP...
www.puriteaudio.co.uk
Keith
Note, the HDMI IIS is a digital output and not an input !
Shame they did not make the DSP functions work for Analog in or Digital out (why I won't get an A8).
When or if you do compare the 2 units (you are probably joking since you think all sound the same), measure & match the voltage at speaker terminals and NOT the DAC outputs on A6/8 !
I always do this since the source device output impedance and PreAmp input impedance form a voltage divider that can make a significant delta (up to .8dB) between the two devices. With the two Eversolo the output Z is probably identical or close so not as big a deal but best practice anyway.
Also this must be conducted in a well setup system, proper speaker placement & room acoustics for sure.
Doing something like this in dealer showroom or even unfamiliar setup is useless.
You will disagree but blind testing is not required if the person is alone, knows their system sound and source material well and has no bias toward one component or another.
I'm the biggest audio skeptic ever so I'm not influenced by some fancy 1/2 thick machined panel or other marketing snake oil BS.
Switching can be a variety of ways but must be no more than about 5 seconds gap between (IMHO and about what it takes for the A6 to switch from analof to digital outs).
Most of the time when I do a comparison, I can either switch in inputs on the 2 outboard DACS or the inputs (relay switched) on the PreAmp with little or no delay.
I have done both blind/sighted over the years (Including making my own ABX box once) and as long as one does not try to guess (as in not hearing a clear difference), I have reached similar results either way.
Then again, people tell me I have Dog like hearing, "whats that noise" I say "I don't hear anything" they say !