I have asked to Amir what would be the ending SINAD when pairing the new Denon 3700H with a purifi amp.
Please find below its disappointing answer:
Well, I tried to test this scenario but failed completely.
Hooking up the output of 3700 to Purifi using RCA to XLR adapter generated worse results than the internal amps! Some of this I traced to increased ground loop. But even when I filtered this out, the Purifi still performed worse.
I then tested the Purifi using my Audio Precision unbalanced (RCA) outputs. To my surprise, its performance was worse than it was with balanced input. It was still much better than what I could do with 3700H though.
After an hour of messing with it, I gave up. It is possible there is ultrasonic noise from the 3700H DAC that is disturbing the Purifi amplifier (wild guess).
In abstract, you need to have the amp be 10 dB better to have it almost be transparent (0.5 dB loss in SINAD). In your scenario we don't have that so the SINAD will drop to around 96 to 97 dB (my guess).
Since I am envisaging such set-up, I would like to know if anyone has already successfully associated an AVR (especially a Denon) with either hypex-based or purifi amps?
I am looking forward reading your feedbacks!
Please find below its disappointing answer:
Well, I tried to test this scenario but failed completely.
Hooking up the output of 3700 to Purifi using RCA to XLR adapter generated worse results than the internal amps! Some of this I traced to increased ground loop. But even when I filtered this out, the Purifi still performed worse.
I then tested the Purifi using my Audio Precision unbalanced (RCA) outputs. To my surprise, its performance was worse than it was with balanced input. It was still much better than what I could do with 3700H though.
After an hour of messing with it, I gave up. It is possible there is ultrasonic noise from the 3700H DAC that is disturbing the Purifi amplifier (wild guess).
In abstract, you need to have the amp be 10 dB better to have it almost be transparent (0.5 dB loss in SINAD). In your scenario we don't have that so the SINAD will drop to around 96 to 97 dB (my guess).
Since I am envisaging such set-up, I would like to know if anyone has already successfully associated an AVR (especially a Denon) with either hypex-based or purifi amps?
I am looking forward reading your feedbacks!