Over 25ish years of listening to audio equipment I’ve always thought there are audible differences between amplifiers.
Some examples have already been mentioned, but some standout memories are:
Denon PMA250 - clean, not very dynamic.
Arcam Alpha 7 - warm, wide soundstage, coloured
Cyrus 2 - clean, detailed, bit mechanical sounding in the bass
Naim Nait 3 - warm, dynamic, noisy
Naim Nait 5 - very warm, euphonic, nice bass, smooth
Linn Intek - opposite of Nait 5
Cambridge Audio from late 90s - terrible, bright, soundstage a mess, fatiguing
Marantz from mid 90s - “sparkling” treble, no soundstage depth, un-natural, not good.
Meridian Audio G57 - impression of being incredibly transparent. Very clean, complete control of speaker. One of my favourites.
Primare A25 - Similar to Primare Meridian , but perhaps smoother and more natural. Really lovely.
One of the things I hear between amplifiers is their bass control. This doesn’t seem to be related to max power output.
Could this be related to current delivery when both channels are driven (bass being mostly mono)?