Hello all. Wondering if you could enlighten me on some audio questions. I am builing a dedicated HT room in my basement, and currently would like to "re-use" some of my equipment (audio) to help keep costs down. I have a Yamaha HTR-5635 or 5640 home theater reciver, it outputs 5.1 and I think its 80 watts per channel. I have a Sony 5 speaker system (small speakers, pictured in my gallery) with a Sub that came with them. I have 2 Infinity Sutio Monitor 150's (SM150's) that I got for free about 5 years ago, from the late 80's I imagine. Here are the only specs I have on them: Frequency Response: 44Hz - 22kHz (+/-3dB) Crossover Frequency(ies): 500Hz, 5.5kHz Nominal Impedance: 8 ohms Recommended Power Amplifier Range: 10 - 200 watts RMS per channel Woofer: 15" polypropylene coated Midrange Driver: TWO - polypropylene coated cones Tweeter: 1" polycell "high-output" Question: Would these SM150's make better front right and left channels than the small Sony's I have? Would my receiver power them ? (I'd have to lug them down 3 flights of stairs to "test" this theory out"). Since they are big and bluky (and heavy!) I'd recess them into a partition wall (wife factor, must hide everything). I figure they were probably great in there day, why not re-use 'em ? OK second question! If question 1 is "yeah try them out, they should work fine" that leaves me with a really small center channel speaker (it will look ridiculous under a 70-80" projection screen), which I will need to replace. Understood. But, it also leaves me with 2 extra Sony speakers. I have 5 total, 2 for rear left and right also. How dumb an idea is it to split my speaker wire for rear left and rear right and have 4 rear speakers on a 5.1 system? Meaning 2 rear left and 2 rear right? I'm guessing I would ceiling mount them and point them in 45° angles (one for back row one for front row?) Horrible idea?