In the current (September 2002) issue of Bass Player magazine on page 11, there's a response to a question someone sent in as to which cabinet moves more air, a 1x12 or a 2x10. They gave a pretty safe answer about all things being equal, yada, yada, yada that the 2x10 should move more air. Anyway, that's not why I'm starting this thread; they also had the approximate cone areas of the most common bass speakerss, which I will now share with you guys & gals in case you don't have access to BP mag. And here we go~~~~~~~~~~ 1x8 ~~~~~~~~~~ 35 square inches 1x10 ~~~~~~~~~ 55 Square inches 2x8 ~~~~~~~~~~ 70 square inches 1x12 ~~~~~~~~~ 80 square inches 2x10 ~~~~~~~~ 110 square inches 1x15 ~~~~~~~~~ 130 square inches 4x8 ~~~~~~~~~~140 square inches 2x12 ~~~~~~~~~ 160 square inches 3x10 ~~~~~~~~~ 165 square inches 1x18 ~~~~~~~~~ 185 square inches 4x10 ~~~~~~~~~ 220 square inches 2x15 ~~~~~~~~~ 260 square inches 8x8 ~~~~~~~~~~ 280 square inches 4x12 ~~~~~~~~~ 320 square inches 6x10 ~~~~~~~~~ 330 square inches 2x18 ~~~~~~~~~ 370 square inches 8x10 ~~~~~~~~~ 440 square inches So, I don't know how useful this is, but, at least we non-techies have a starting point from which to judge our present speakers, and an idea of how much area we'd be adding with another speaker. Cabinets sold separately. Enjoy. Mike J.