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Best efficient, passive sub - Any suggestions?

I am looking for a passive subwoofer that will work well in a midsize room on 75 watts. I just purchased a Jolida integrated amp and discovered it has 3 channels and I may be putting together a system for my family room based on the Jolida and a pair of Soliloquy SAT 5s (depending on whether or not my auction receives any bids). The Jolida 1703 is a hybrid with a tube preamp section and 3 channels delivering 75 watts each. The SAT 5s are 2 way monitors with a 1" dome tweeter and a 5 1/4" woofer. I am probably looking for something small as I only have 75 watts and am not concerned with rattling the walls - just something to fill out the lower octaves. Anything with a built-in crossover would be a plus (or any suggestions for an inexpensive outboard crossover would be helpful). I listen to all sorts of music and this system will very likely be exposed to Barney, the Wiggles (responsible for possibly the most annoying songs ever recorded), and Disney cassettes belonging to my 3 year old daughter. Thanks for any suggestions.
timothyjk

Showing 1 response by ezmeralda11

ezmeralda11
303 posts
 
9 times out of 10 active subs are better, this is still maybe one of those 9. Your sat-5's are 87db efficient in an acoustic suspension design with a manufacturer rated 60hz-20,000hz (w/out any tolerances). If the speakers are flat down to 60hz they'll roll off at 12db an octave as frequency drops below that (a 2nd order slope). You're amp doesn't have a seperate volume for each channel (not good). You'll have to omit "best efficient" from your criteria if you want a good balance of sound I think: A 95db sensitive sub on 87db senstive speakers wouldn't be a good match (unless you want alot of bass). Room acoustics (room nodes), speaker placement, and general LF reinforcement can effect your choices quite a bit too. My general guidelines for choosing a passive sub-

--Don't get anything greater than 90db sensitive.
--Maybe set your xover point at 60hz? (Chances are your main speakers are rolled off -3db at 60hz-the F3 point)
--Maybe a second order low pass xover?
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