Yes, you can use your old A/V receiver for your subwoofer. Before doing this look in the manual for your dolby digital A/V receiver to see if the subwoofer pre-out is not fixed at a certain crossover. It may be fixed at 80 hertz or 120 hertz. If you can adjust the subwoofer pre-out then you don't have to worry on finding a crossover. Connect the subwoofer pre-out to either VCR or AUX using a Y-connector. Its best to use an audio distributor. Your old A/V receiver may not be bridgable if you are thinking on increasing wattage output.