"All good (read : competant) amplifiers sound the same under clipping levels when volume matched". I totally agree with such a statement as good amps only do 3 things : recieve, amplify, spit. Easy enough to understand. Now comes the hard part, only measurements will tell which are really good amps, how do we buy stuff that are not measured? There are many amps out there that have their own sound signature embedded in by the manufacturer to make it sound special or attractive. Is there any way to tell which amp is 'good' without measurement? Are there any 100 - 500 dollar amps that measure as neutral as the 'good' amps 10 times their prices (not power wise obviously)? Listening to 2 unmeasured amps wont help either because both might be 'coloured'.