2nd Gen Access Cab - Rear speaker wiring question

I've searched the forums on this but have not found a clear answer. So in an Access Cab, you have the little exciter speakers in the headliner and, because it's an 09, in my truck I have the factory subwoofer in the back, and my truck was a non-JBL audio head unit. The exciters and the subwoofer are both run off the rear speakers outputs on my new head unit.

My question is how? Is there a factory crossover somewhere sending the highs to the exciters and the lows to the sub? Did they split the outputs and send all the frequencies to both locations. I need to know because I plan on putting 6.5" speakers in the the rear doors and I already extended the wires for the exciters to the doors. Can anyone shed some light on this?

 

The inputs to that odd sub on the back wall are tied to the rear speaker channels so they "should" be full range. The subwoofer amp handles the low-pass crossover.

For the headliner exciters, i want to say they have a crossover built in.

Look for something like this black piece. This is the crossover on a factory tweeter. This is typically what is used in non-amplified systems

 

Drat! I looked and I think I already threw my exciters away. I suppose the only way to verify now is to hook some speakers up and play a range testing sound file. I hope they didn't divide the output power between the exciters and the sub.

 

I highly doubt they did. That would cost way mire than just sticking a capacitor on the speaker. Normally everything in non-amplified systems is full-range signal.

 

I still wonder how they sent left and right power to both the exciters and the subwoofer. A straight split makes the most sense but where would that splitter be located?

 

Somebody must know the answer to this question. I'm making a video about this upgrade and knowing how this works will be a great reference for myself and others in the future.

 

https://www.tacomaworld.com/threads/radio-condenser.270811/

 

FINALLY, the answer! Thank you so much for this link!