[pop80_uk]

I have no real idea why you would want to do this as the sub woofer in the two main speaker of your technics system will be balanced to the rest of the system and impedence of the main amp. Although to do it you would need a two way cross over and an external amp to drive the car sub only. Its possible but you would also need a cross fader to ensure the speaker was balanced, also looking at your room it seems on the small side and the amount of air the sub would displace would probably mean you would end up with a very un-balanced sound.

On a lesser note, if you like the Buffy and angel videos on the top of your unit I would remove them from the sub, as unless it is shielded it will damage the videos.

Thanks