Need advice on a passive subwoofer


I might be in the need of a passive subwooofer in the near future. I won't know until I've broken in a new set of speakers. I've been advised that I should look for a passive sub with an impedence of 4 ohms. I don't need a homewrecker, just a musical sub to fill in whenever the need arises. A subtle sub will sufffice. I would appreciate any suggestions as I have no working knowledge of such a device. The speakers are down 3db @37hz and my room size is small: 15' by 11'. My price range would be up to about $500. Any suggestions would be appreciated
nonoise

Showing 3 responses by nonoise

On the advice of someone who knows my setup (a TAD Cayin TA-30 tube integrated), using a passive isn't that complicated at all: "first connect to 0 & 4, then connect the high driver '-' to the 4 tap, '+' to the 8 tap (double stuffing the 4 tap), using the entire output transformer winding in a semi-isolated manner. Its like having 2 amps in one". Or so I'm told. I've found that there is more than enough current (I used to drive Legacy Classics w/no problem) as long as the speakers are effficient. The speakers that I will be getting are 93db efficient. All I may need is a modest, musically accurate sub.
Warnerwh:
Thanks for understanding my question and for the advice. I'll check out the sites you mentioned.
No, I wasn't planning on adding a crossover and/or amp: as I stated in my initial post, I'm new to this and need advice and appreciate all the input I can get. I don't know where this will lead or how I'll end up implementing the sub. My goal is a symbiotic relationship w/my existing system with no 'seams' in the sound.
And Raul, thanks for the leads; I'll check them out.