These days I am into SET amps and high efficiency speakers so I need speakers that are at least 93dB efficient.

I'm thinking of building five Pro 3s that are 10" deep (the surrounds will be in a bookcase on the back that will also house the amps and processor so they don't count for the 25 cm). A plasma TV is slim enough (and I already own it) and I only need a subwoofer.

My idea is to build a slim tower about 40cm wide, 180 cm tall and 25 cm deep. Internal volume should be around 125 liters. A closed box simulation shows f3 at around 90 Hz BUT, by using a 1,200 watt amp I can get 106 dB at 20HZ or 110 dB at 26Hz with -3dB at 20 Hz. I can use a PLLXO 12dB per octave low pass at around 30 HZ and voila: a subwoofer that goes down to 20 HZ at 110 dB and that is slim enough to satisfy my kids and my ego :^).

I have a commercial subwoofer that I can sell for the cost of the four 2246s and the 1,200 watt amp so we can assume that cost is not an issue

Am I crazy?

xavier

ps Actually my kids are only 2 and 1 and they would allow me anything but this is THEIR room not mine.