car stereo channel summing

[doublez28]

i have cadillac cts with factory bose radio & amp, i have to keep both because one will not work without the other correctly. i have 6 partial channels, 2 for 100 hz & down, 2 for 100 hz -8khz, 2 for 8khz & up, all six of these make up only 2 full range channels, want to sum three together to make full range channel x 2, the speaker wires from the amp are hi level, after summing 3 to make full range channel have audio control lc2i, to change them from hi level to low level inputs to external amp, what size resistors will i need to sum 3 channels together to make 1 full range channel x 2 ? thanks

 

[Perry Babin]

Have you checked with PAC, Metra, etc to see if they have anything?

The signals may be balanced which would complicate using resistors alone. Transformers or op-amps may be needed.

 

[ween]

JL audio used to have this: CL-SSI - Car Audio - OEM Interface - OEM Integration - JL Audio. Might be available somewhere.

 

[The Lord Flashheart]

Audio control LC7i

LC7i | AudioControl

 

[The Lord Flashheart]

Sorry, that message seems a bit truncated.

I would sell the LC2 and buy a LC7i.

It can take all 6 channels and will give you 2 (or even 4 if you want/need) full range channels out.

It would be much easier, and better from a signal path perspective, than buying a second Hi/Lo converter.

I’m not sure how summing with resistors would work?