We are a coda dealer so we are going to be biased th.8 is a fabulous amp clean detailed transparent while still sounding a tad warm huge soundstage great bass
the amp is in reality three different amps depending on bias
You can order one way and re-bias the amp in the future for more power
we tend to go with level1 150 watts class a/b which would be perfect for your quatros.
however at any time you can have the amp re-biased to get either 250 or 400 watts a/b
so if you ever got a much less efficient loudspeaker you would not need another amplifier
add to this incredible build quality, a fantastic warranty, manageable size and weight, runs warm, not hot. made in America you just cant go wrong.
Dave and Troy
Audio intellect NJ
Coda dealers