Robert "bad scientist" Morein said:

This could be the r.a.o. record, measured as a ratio of
quantity/quality
The QSC amps are unlistenable.
The Sony SDP-E800 is a cheap piece that was known for excessive
background
noise.

Actually, the QSC amps are built like the proverbial brick **** house
and their performance is rack solid at all frequencies. They are
extremely linear, so if you thought they sounded bad when and if you
ever listened to one, then either you have badly damaged hearing, or
you listened through speakers that were second rate or worse, or you're
just not speaking the truth.

Perhaps you'd like a job reviewing for Stereophile?