Although most persons I have asked have said that it's better to buy than build from a price / quality perspective, I have wondered about the suitability of commercially available sub-woofer drivers designed for the car-audio market in a bass guitar cabinet. I know the eyes have probably started to roll, but could someone give me a reasonable answer as to why this would be a bad idea (or a good one)? As there is such a huge market in the car audio industry, I would imagine that competition might drive quality up and prices down. The market is not as broad in the music industry and quality components are quite expensive. I can hear my neighbour's truck's 2x10 boom-box a block away. Surely an 8x10 cab with the same components might power up a stage??? Constructive feeback please.