Over the past couple years I have purchased an SVS PC+ sub which was later replaced with an SVS PB2+. I sold the PC+ sub, but sitting in my basement I still have a JBL 110 Watt subwoofer that was the original sub that I owned. I measured the response of the JBL sub once and I believe its -3 dB point is around 39 Hz (the PB2+ dos a little better...) Does anyone have a recommendation for what to do witht the old JBL sub? I suspect it isn't worth my time to try to sell the thing. Would it be worthwhile to try hooking it up in paralell with the SVS, or would that just throw off my response curve?