Subwoofers.... one 10" or two 8"?


I'm looking to fill out the bottom of my simple 2 channel system  (Musical Fidelity X-Ray CDP through Peachtree Audio Grand Integrated amp to a pair of Mirage OMD-15 full range speakers).  I occasionally will play the TV audio through the system for movies, but not interested in an HT setup. Music is the prime focus. The room is "medium" size.  I know that will not give the deep bass feel of a 12", but the difference should not be too great, and a 12" may be overkill for that room.  I've also considered getting two 8" subs to keep the sound balanced between the left and right channels. I think the  8" may be enough bottom for my room and tastes. I'm on a budget so getting a pair of anything bigger than 8" may not be in the cards.

Any opinions or suggestions as to whether I'd be better off with one 10" or two 8" subs?

















larstusor
With all due respect to gdhal, I went with a pair of SVS SB1000 to fill out the bottom end from some Silverline Prelude Pluses.  The Pluses have surprisingly good bass for the size of their drivers.  If all I listened to were, say, acoustic jazz they would be completely adequate.  BUT things being what they are, I wanted a little more so ordered the SB1000s.  The Silverlines run full range and the subs are connected via speaker level input from amps.  The subs are positioned next to the floor standers and crossed over at around 100 Hz.   I listen about 8-10' from speakers that are 2-3' out from front wall in a ~19'x21'room with an open back wall (i.e., wall behind the listening position).  Subs disappear but give Tony Levin's bass a nice growl and make Bela Fleck's Cosmic Hippo sound amazing.  The system is posted if you want to take a look.  Good luck in your decision.
On several occasions I have demo'ed a wonderful 10" REL and 8" Sunfire. Both will fill the OP needs.
The two subs I'm looking at are the NHT Classic 10 and the Energy ESW8. Both of these have fully variable crossovers and they both have the black piano finish that would match my mains; not necessary but a bonus, all other things being equal.  Is there any advantage to connecting to the sub out of high level speaker outputs as opposed to going from low level preamp outs?
In theory, if  you have the time and space to find the optimum location for the subs, 2 assymetrically placed subs will usually yield a smoother combined response.

Having said this, a 10" sub is a lot better than an 8". The surface area a 10" driver can move is close to that of 2 x 8" woofers, so distortion, low frequency and dynamic range all get much better with those 2 extra inches.

Looking at the review though, I would think an EQ is a better solution than a sub for you.  Or an EQ and a subwoofer. I'm actually really surprised to see measurements that show such a difference between the treble and bass (10 dB!) That's kind of huge. Adding more bottom end weight may be the worst possible thing.  The only way to tell is to measure in room though.

Best,


Erik