Back Before Jen... I had a home theater and a living room...
The basement had a 92" projection screen. The speakers for the 7.2 surround system were all midrange Infinity speaks, and were pretty decent for movies. They rocked for stuff like Floyd's 5.1 mix of Dark Side of the Moon... The subwoofers were a pair of 15" sub drivers I got from Parts Express, originally in a pair of Sonotube enclosures tuned to about 17hz, but then moved to a "gorilla coffin" size box, tuned to 21hz.
Signal came via a Sony SACD/DVD player, into a Denon AVR, then out to a stack of Crown gig amps, except for the 2500 watt Behringer amp that ran the subs (and the speaker stands as mono).
There was active EQ for all channels, and a parametric EQ for the subs. The EQ for the mains also split off a crossover for a pair of the 15" subs in 0.9q sealed boxes that acted as stands.
The couches, which were fairly lightweight, had transducer pucks bolted on, so that when that damn dinosaur stomped, you would feel it. Some people completely freaked.
That room was GREAT for rock and roll... Floyd's "One of these Days" from Pulse and the Cream Reunion "Toad" would make the system clip if you twisted hard enough.
The living room? Stereo - a pair of Magneplanar intro speakers on top of a pair of "speaker stands" which were the Parts Express subs in 0.7q sealed boxes (still have them - unused), run by an identical Sony SACD/DVD player or a Denon AVR into a stereo tube preamp (google Aric Audio), and then into a Hafler DH-200 (still have) that could push 135wpc CLEAN all day long. No EQ. Sub amps were a pair of Parts Express plate amps.
Today? Some Pioneer AVR that I impulse purchased, a Samsung 43" TV (not all that smart), a smart Samsung blu-ray player, and a pair of Yamaha 15" horn gig speakers. The 0.7 boxes are under the stuff, but I haven't hooked them up, since I figure I could get the cops called without them.
It's good enough.