Originally Posted by tngiloy
Please post your results on the thread. I've ordered a Bryston bcd-1, and although its not in the same class as the Ayre I do plan to hook it up via the balanced 2 channel input. I will be interested if the sound on your freind's D2 is the same or not.
I'm sure you probably thought of this, but the D2 defaults to 'anthem logic music' in the analog dsp inputs. You need to set it to 'stereo' in the 'mode presets' for the '2 ch' input.
If it were in 'anthem logic music' it would definitely have a different sound since it would be matrixed to the surround speakers. I only mention this because its something I might overlook. The D2 in analog dsp/stereo mode should just send low frequencies to the sub at whatever crossover point you or your ARC has set.
BTW did you try both balaced and unbalaced connections from your Ayre to the D2? Did you have the same results?
I look forward to your results.
Tom, for sure I'm just as interested as you to find out so I will post results when I have them (thanks to Ben).
Yes, I've cycled through the various setup options for 2-channel in Analog DSP. I set the D2 to Stereo and turn off/on Room EQ. The D2 is converting my Ayre's balanced analog input signal to digital, upsampling and adding processing for Room EQ (or not if it's off), then converting back to analog, the sound either way is simply is not as full as with analog direct. The low frequencies take on a slightly different image due to the mains high pass crossover now directing low frequencies to my sub (compared to analog direct with no sub in my case), but the biggest difference is in the midrange and upper frequencies.
A great CD to compare is The Best of Dire Straits - Private Investigations 2nd Edition. When I play track 2 Sultans of Swing, in analog direct the clarity and accuracy of Knopfler's guitar is astonishing, but when I switch to Analog DSP his guitar becomes slightly truncated and disjointed, like it's clipping. Believe me, it still sounds *ok*, but it's simply not as high quality a signal as with analog direct and the difference is very clear to my ears.
When I completely change over to digital AES/EBU into the D2, I get very similar results as with Analog DSP....but now it's pure digital in...this is why I'm thinking something could be haywire with my D2's DAC's.
Now I haven't tried straight RCA from the Ayre into the D2 because I don't have any quality unbalanced cables, but this at best will be Analog DSP. Perhaps I can try this with Ben, but I don't think it will make much of a difference.
Sure, once I get more information on this, I'll post again.