I’ve done some testing of late that I thought might be of interest. No, it doesn’t involve an AP analyzer nor any REW measurements. If that bothers you, please stop reading.
I recently wired up my system to allow for any of the following:
- DP59L->Puffin->24/96 SPDIF->Inday 1-4 coax SPDIF distribution box->
- 1. Direct into my Marantz AV10 Coax SPDIF input, or
- 2. Direct SPDIF into a Topping D70 Pro Sabre DAC
- 3. Direct SPDIF into the DMP-A6 Master
- Analog XLR from either DAC into the XLR input of the AV10->AMP10, or direct into the AMP10 (using the D70 or DMP-A6 in preamp mode). I’m using two different Nobsound XLR switchers that were reviewed up here and are passive with no signal degradation.
- I can also easily compare the DMP-A6 DAC vs. using the D70 Pro as an outboard DAC to the A6.
If it sounds confusing, it sort of was - I had to diagram it out to make sure I wired it all up correctly. But it works beautifully and really provides tons of flexibility in comparing DACs in the AV10 or external DACs.
So here is the disappointing part for most. My testing wasn’t blind so it would have been very easy for me to favor one over the other but I’m telling you the differences were indistinguishable. I found the D70 Pro to have very slightly lower output using the 4V vs. 5V setting but otherwise, I could literally switch between the A6 and D70 and you don’t even hear a click, let alone differences in sound quality or levels.
SPDIF direct into the AV10 was also very good. I perceived it to be slightly clearer but of course, it may just be a very slightly cleaner signal since the signal path goes direct into the AV10 vs. into the XLR input of AV10 (whereby its put through ADC). Pure Direct vs. processed using Dirac mattered very little with the exception of bass is more pronounced when using up mixers and RC in the AV10.
I am 100% convinced that I can sell the D70 Pro and the A6 would be perfectly fine in my setup. So why keep the complicated setup? Well for one thing, I like the FFT on the D70 and VU meters on the A6. With the Inday box, I can see both since both are receiving the same SPDIF signal at the same time. I recently tried to sell the D70 Pro Sabre and couldn’t even sell it for $425…so I’m just going to keep it. If for no other reason than the entertainment value of the FFT spectrum analyzer. But likely I will set it up as preamp to the AMP10 and use it exclusively when listening to vinyl on my turntable for a true 2-channel experience.
I wish I had the experience and tools to measure each signal path more critically, but I do not. I just found it fun comparing the various DACs and signal paths and thought I’d share the really good news – that we’ve survived the bleakness of the pandemic and supply chain shutdowns and are entering a bit of a renaissance in hi-fi in my opinion. There are so many good options available, and they do not need to cost $30,000 to get you into the game. The DMP-A6 is one great example of the tremendous value in
hi-fi right now that absolutely would have cost you 4x or more just one year ago. Enjoy the music ladies and gentlemen and stop bickering about 5dB differences in SINAD.