Guess the op has got the idea.. its a complete no-no match.
OP: the 803d is a top of the line speaker, and needs top of the line components along the entire chain starting from source to perform at its level. Being extremely revealing, these speakers can expose a sub par component so badly you will wonder why it's sounding so bad. But its not the speaker that's underperforming, but the supply chain.
Onkyo is no way a top class amplifier. Classe, pass labs, jeff rowland these are top class amplifiers, the level this speaker needs. At least 150 watts into 8 ohms with a minimum of 15-20 amps of current.
I had once heard a low end b&w with a mid end onkyo stereo receiver. I couldn't stand it for more than 2-3 mins max.
So you get now, what got us guys so stirred.