I have a 1989 Corvette it originally came with a Bose system in it and all the amps and speakers were toast.. the person prior to me put in a single din stereo in it. I removed all the old stuff including speaker wire. I purchased a Blaupunkt Vermont72 s head unit, AMP1504 Amplifier, and a GTHS80 Powered 8" subwoofer and Infinity 6X9's doors and in the rear. It has plenty of watts to drive all 4 6x9's I have everything hooked up but the Powered Subwoofer. I was told that i could use the 1504 amp that has a bridgeable RCA connections. I plugged the powered amp RCA cables into the Output of the Amp. Did not work..So i plugged them directly to the head unit and it worked fine. So my question is: Can i use this Power sub in the current setup i have or do i need to get a new ? Thanks Dennis.