Unknown names in Subwoofers

The 12's are for the punchier bass and the 15 will be for the low rumbles. I saw a setup like this with in an expedition and it was amazing. The 12's were setup with a bandpass filter around 75hz - 150hz and the 15 was setup with a lowpass at 80hz. I liked the setup.

What you've described is the perfect way to use mixed sizes.  Set up correctly and with the right drivers, it can really be effective.  Then add a set of 7" or 8" woofers in stereo crossed between 150 and 600 Hz for the full ffect...

Yes, that's true.  But he could get the same results from a good 15 that is properly setup (minus the 12's).  Plus he would save on room and power.  But if he does want to break it up like that, I suggest using 8's instead of 12's.

But I personally wouldn't want so much coming from the rear.  If possible, you want your front speakers to be able to play down to around 60 Hz, and have your subs pick up in the back from there.  That will reduce localization that way.  Maybe a better option would be a better midrange up front to give you those lows.  Or go with the above suggestion and use dedicated midbasses up front, but have them play down to 60 Hz.

Steven Kephart

Adire Audio

Back to the original question:

Pyle, Earthquakle and Pyramid are very well-known names.  Pyle and Pyramid are ultra-low-end margional quality and not recomended if you care about sound quality or longevity.  Earthquake (Hohmann International) on the other hand is a very good brand (located right down the street from my office) that compares favorably with high end brands like Morel or Dynaudio, but they can be hard to find.  Their Magma car woofers are fantastic and their amps are quite good.  They make a superb line of home theatre equipment (their SuperNova sub woofer is one of the best for the price.)  Highly recomended if you can find their gear.