Has anyone tried Audiobahn amps? I did a search and came up with some comments on their speakers but no info. on amps. I am looking at their Intake Series A6004T 4 channel which is 9" x 9 7/8" (so it might fit under the passenger seat?). Or the A6601 six channel amp (bridgeable) and bridge channel 2 of channels together for a sub. Is it kosher to bridge only a portion of available channels or must one bridge all 6 channels? Thanks.