A: You will need a small amplifier with a low pass crossover in order to install it properly. If the tube contains an internal amplifier, than you simply install it like you would install an amplifier. Provide power from the battery, a switched electrical source (typically from behind the radio) and a ground. For signal, you will need to tap into the rear speaker leads in the vehicle and utilize the high level inputs provided on the amplifier / tube. If it does not have a high level input, you...

the External amp is a 2 channel 300w Blaupunk a head of a GM monsooon head unit

A: no. do not use a separate amp. the built in amplifier is specific to the sub it is serving. the bazooka bass tubes are very high efficient subs and are matched sonically to their amp.

i got a bazooka bt1014 subwoofer 200 watt, i heard its powerful... what kind of amplifier i need. what do you recommend ??? my car is a 2001 nissan maxima GLE

A: well, if it's 200 watt, then im assuming thats the RMS of the woofer, which is the everyday amperage, so any amp that has at least 200 rms of power will be sufficient. If it is 200watts peak power then consult the manafacturer for the rms