Ive got a Very nice enclosure that I want to put some New Speakers in. The Two I want to replace are The bottom 8"s that it has. However Ive ran into a few problems. Wheres a good place to buy Just speakers? Maybe use car speakers? My amp has two channels per speaker, one set for highs, and one for lows... but theyre at 6 ohms each. What would happen if I were to use a 2 ohm driver being fed 6 ohms? The sub is at 8 ohms.... is that common? Thanks.