legacycentral bbs

My sister gave me her old 12" Rockford Fosgate subs and Punch amp but to my knowledge there is no way of hooking them up to my stock stereo. I'd like to keep my stock stereo if possible because if i went aftermarket I'd be too temped to invest in a serious speaker upgrade . Any Solutions??

You can get line out converters that turn high level outputs (speaker leads) into RCA inputs to use for an amp. It's not the best, but does work.