Hi: I am new on the Forum and find the information here valuable, so I thought I would seek the advice of the speaker gurus. Anyway, I obtain 4 Boston Acoustic Model A70T speakers from a local movie house that went through some renovations and weren't going to use them in the new theatre. I don’t believe you can buy these speakers at any retail outlet store. Here are the Specs from Boston Acoustics on the speakers: The A70T surround speaker is designed to be used in commercial theaters. It meets Dolby Labs ISO2969 curve. Specifications: Low Frequency Cutoff (+- 3dB) 45Hz Nominal Impedance 6 Ohms Minimum Impedance 4 Ohms Sensitivity 90dB/2.83v/meter Crossover Frequency 2000Hz 8" woofer 1 " ferrofluid cooled tweeter Recommended Power 15-100 watts Cabinet Finish matte black Dimensions 610 x 356 x 203 mm 24x14x8" Weight 11.8Kg (26 Lbs.) I am currently using 2 of them for the front mains and 2 of them for the rear surrounds. I also have a Paradigm CC-70 for a centre channel and a Paradigm PDR 10 for a Subwoofer. The receiver is a Sony STR-DE835. Now I am a newbie to the home theatre seen, so I was wondering if this is a good setup? Is my Subwoofer too small for these speakers? I notice the Boston speakers go down to 45 Hz and I believe the PDR 10 goes to 27 Hz. Should I have a sub that goes lower. I have all the speakers (centre included) set to small on the Sony receiver, and the sub is connected to the receiver sub output using a subwoofer cable. The sub cross over is set at its highest point, so that I am using the receiver cross over. I don't know what the receivers cross over really is because I can't find any place to adjust that. I assume setting the speakers to small initiates some sort of bass management on the Sony receiver. The room dimensions are 12x40 with an 8 foot ceiling. The viewing area is in a rec-room basement in one end of the room that I may close off to 12x18 in the future. I guess what I am asking, based on the speaker specifications, is this a good setup that will give me some quality sound? I would say that 80% of use is DVD viewing; 20% music listening. Any advice/information would be great. Again, hats off to the people that take care of this forum; it really helps beginners like myself.