BitTen D High-Level Input Question

[TheMayer 10+ year member]

My 03 C230's factory Bose amp has 8 channels. Front tweeters, front woofers, rear woofers, center fill, and sub. The processor can take in 4 channels. I am also ditching the center fill. Obviously I should use the front tweeters and woofers, but I am worried about losing bass if I leave out the sub channel.

I feel like this is a dumb question, but what would happen if I were to combine the sub channel with both of the woofer channels then sent it to the processor? Would this cause a short circuit or some kind of weird impedance situation at the amp?

On a side note, If by chance anyone happens to know the speaker wire colors for the Bose system, that'd be great.

Thanks

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