i have built a new theatre system with 1 tfm75 running 2 ea 500lb 21 inch subs in front. 2 ea 500 lb rear subs with 2 ea 15 in drivers each. they are driven with a silver 9t each. i am running a 5.4 system using an marantz av10 processor. all speakers are carver mk4 ribbons with the 12 in drivers not hooked up. there are 2 ribbons at all 4 corners. the rear ribbons have an 9t on each. the front ribbont are run by a parasound jc5 stereo amp.. the center ch is an horizontal ribbon run by an 9t. i hand made all 4 sub cabinets my self . they are built by predrilling, glueing, clamping, screwing every single step. 2 layers of 1 inch mdf and 2x4 frameing and extensive bracing. these cabinets do not resonate. 7 ea 9t amps,, a tfm75, and a jc5 for power. a song 8k-85 inch tv and sony 4k blueray player. all interconnects are the best i could find. my room is 11 feet high by 35x43. iam not rich. i do not have a kitchen or wash machine. i do laundry in town. my pashion is audio. thanks for reading. i will send pics from vermont when i get to that level. i have been to the carver get togethers 8n n carolina in the past. my name is Terry.