M.s.r.p. on that receiver is $999, It can be had for around $500 if you do a web search. The 150 watts is not full bandwidth..it is rated 110 watts all channels 20hz-20khz from the info I find on the web. It does have 5 user reviews listed at audioreview.com. He could drive the passive subs with two of the channels as he stated I would think, the info I found on the web for this amp states that amp channels are assignable.
Dave
Dave