What make is the bass tube, how many watts does it say on there, need to know if the rating is DIN, RMS, MPO, PMPO, what else are you running in the car aswell. Has the tube got an internal crossover ?
To run just a bass tube you will probably need a mono channel amp or a bridgable amp (i think this is when you bridge two channels into one???).
I used to have a Kenwood mono channel amp a few years ago which was very good, ran a little hot, but very good.
I also had an Alpine V12 (bridged from memory), which was awesome, till it blew up in me mates Bimmer. D'oh.
There are a few ICE teccie in here somewhere that will probably give their advise.
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