I need some advice...! After a lot of persuasion, I think I'm actually going to be allowed to buy a sub to complement my hi-fi/home cinema setup. Only thing is it must be wife-friendly i.e. small. Room is only 12'x10'. I have some large Ruark Crusader floorstanders which are (under)powered by a valve amp. Sound quality is fantastic, but bass lacks a bit of weight and slam especially for movies. Rest of system is a Yamaha DSP-E492, Yamaha 105 wall-mounted surround speakers and a Paradigm CC-150 centre. (Eventually I plan to bi-amp the speakers with another couple of valve amps that I have lying around to beef them up a bit.) Any sub must be good for both hi-fi and home-cinema use. Don't mind whether it's new, second-hand or a DIY kit. Was thinking along the lines of either the IPL SW2 or the MJ Pro 50 (on size grounds more than anything else). Understand from reading these forums that the REL Quake should not be considered and even the 'award winning' Q-150E is not so good. Would like to go for the Q-bass 50 or the Q-100, but they're just too big. Are there any others I should be considering? Would a sub of this size add anything much to the Crusaders (£1600 floorstanders) bass output, or am I expecting too much from a tiny sub? Hope someone can help.