Originally Posted by blazar
I am using a Pass Labs 30.5 Class A amplifier... any thoughts on the merits of this on purely technical terms?
According to The Pass web site
The Pass 30.5 is a "30 Watt Class A Stereo" amp.
According to Stereophile, it measures like this:
The first question that formed in my mind was: Where does Pass get off calling this a 30 watt amp?
There are no inflection points that suggest that there is a transition from Class A to something else at 30 watts, for example.
If it was an regular product it might be rated at 0.1% THD which is about 100, 160, and 270 wpc for 8, 4, and 2 ohms.
This test shows totally unexceptional but probably sonically innocuous amounts of distortion that rises above 200 Hz to far higher levels than even a cheap AVR.
Bottom line - to me technically this is just another Why? Amp.
It does sound great overall,
With the usual run of 8 and 4 ohm speakers it should sound no worse than the AVRs that it technically seems to underperform.