To answer your question you pm'd me, there are no crossovers in the doors. If there are, I didn't see them. So I believe the Bose amp is handling all that. Does your amp not have built-in HI/LO crossovers? You definitely need a device like mentioned above. I purchased an AudioControl LC6 (old model, new model is LC6i and can do channel summing). So you need to cut the wires coming OUT of the Bose amp and feed them into the LC6i or ReQ device, then send the RCA's out of this to the amp. From the amp, run new speaker wires to your speakers.
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