geeza said:
only got a cambridge A1 amp though it drives some technics speakers very well. Is there a way to section the bass to only the sub rather than hammering bass through my speakers aswell (as there wouldnt be much point) other than running the sub through an amp of its own?
You'll need a subwoofer with a in/out speaker level crossover, ideally one with a variable and not a fixed crossover (mine is 80hz, not too bad for HT, and not even used if using bass managment elseware in the AV preamp, disable subs own crossover, but if using sub in a analogue Hi-Fi setup sending it full-range might want L/R low pass a bit lower ie 40 hz, then subwoofer to do the <40hz material) Or you could buy an external crossover, these are quite expensive. You could go the whole hog and use active crossovers, convert your speakers to active (no crossover) , crossover is on the racking system, LF/MF/HD crossovers etc...Bryston make a unit but this is very expensive, and you need details on the speakers (Q)
Otherwise an AV amplifier bass management will do this...generally they suck for music. Most Hi-Fi people just send full-range to the L/R speakers, regardless of the speakers capabilities, unless you're using sats should be fine as music isn't that bass driver destroying intensive as films.
Will it's hard to presume how loud you actually want it, and material comes into it also. A subwoofer playing music from a CD will be able to play louder than a subwoofer playing a film, as the dynamic range from DVD's is generally louder on the loudest parts (play Toy Story 2 intro as an example) Buy a sound pressure meter and measure average and maximum dB levels. Contact Tom at SVS and he'll usually help, even though you might not going to buy a SVS product..
[email protected]
also post a thread here, a few knowledgeable people on the subs section
http://www.hometheaterforum.com/
Are those measurements in feet or meters? If it's in feet a SVS 25-39 PCi will be more than enough, in fact probably struggle to fit in your room. If it's in meters I would go for PC Plus or PC Ultra. I use a 20-39 PC Plus in a 3.5 x 4.5 meter room and haven't bottomed it out, no port chuffing or other audible sounds that show it's stuggling, and I have put it loud. Pink Floyd DSOTM heartbeat intro is pretty fun

That isn't a problem for mine, heartbeat pulse throbs the floorboards, no parping from the sub.