Hey I've searched high and low and cant seem to figure this out. If I add a LOC between the Hu and the factory amp (via sticky) will I still be able to hear the factory rear speakers? I'm not super concerned with sound quality and all that BS. Just sometimes when a good song comes on I just want some loud bass.

 

Yes.

As long as you leave the factory speakers hooked up, nothing should change.

With the LOC, you're just splicing in to get the signal, not disconnecting the stock speakers.

 

With the Bose system, you don't need an LOC between the HU and Bose amp. The signal is already line level.

I'm not clear what you are trying to do.

 

but is a balanced differential signal, which most amps can't use as an input. The LOC converts it into a normal signal so that most amps can use it as a normal input

 

All JL and many new amps like a balanced input.