Edited by ALRAINBOW - 2/15/14 at 5:38pm
I have tried almost every possible input on the Daccord and Classic, very good but not great with the HD800. Much better with the T1.
I recently ran a balanced XLR cable directly from my OPPO BDP-105> Daccord via a balanced RCA Y> coax and the upgrade in imaging and soundstage blew me away.
Wait, let's say a song has 2 seconds of 0db, 2 seconds of 20db, 2 seconds of 40db when played at X volume. If you increase the volume to Y, wouldn't the above turn into 2 seconds of 0db, 2 seconds of 40db, and 2 seconds of 80db or something close to that? Thus whereas before there was 20db and 40db difference in sound as the song played, now there's 40db and 80db of difference in sound, thus increasing the difference between highest and lowest sounds? Therefore, isn't volume dynamics?
dB is a logarythmic scale - it doesn't work like that.
Let's try to explain the dynamics with a graph:
The black line (signal) represents the original input.
The blue line (response 2) is the ideal output of the amplifier - it is proportional to the input signal. That I'd call dynamic.
The red line(response 1) is what frequently happens in low quality gear: the amplification is non-linear, i.e. the low amplitude signals are amplified more than the high amplitude signals.