i have a '94fd with the touring package (bose soundwave) and noticed that some fds have rear speakers behind the seats where i have little storage pockets.....i want to also add speakers there........what size fits? can i wire them to the factory system somehow?..........does anybody have those speakers they wanna unload?

 

Very sought after package, the originals are 5x7 IIRC and no they won't wire into the Bose system (has it's own amplifiers for each speaker. Good luck finding the gril covers and speaker mounts. They can be found just have to keep an eye out.

 

They very seldomly pop up on ebay or in the for sale section. I would put a wtb thread in the fs section. I fiberglassed my own 6.5" speakers where the map pockets use to be. No biggie only took me a day and it looks clean.

 

Some info for you...I have wanted to do the same thing.

The Bose system has amps in the doors and also under the center cousel ('94). I am not sure where the center amp is located with the '93 model. The tube in rear has its amp integrated in the housing.

There are wires for the speakers I believe behind the quarter panels. The Bose system is not powered, so the voltage at the speaker wire is very low... millivolt range. I am not sure, but I think these wires are hooked up, but do not carry an amplified signal. The wire designations for the Bose and non-Bose are the same in the manual, so it could be that both cars have the same harness. not sure, just getting into it.

Regardless, if you put speakers in this location, they will need some sort of amplification. I bought a couple of Bose door speakers and found that they also have a crossover and are part of a tuned box, that enhances the bass. Putting another set of these in the back is not possible or a good solution. They will sound poor. Also, there is no switched power for the Mazda amps at the quarter panel location because the non-Bose system has the amp in the radio unit itself.

So, if the harness actually has a signal there (to be confirmed) you still need to run a switched power signal. Not sure if you can pull it from one of the other speakers. It may overload the circuit at high volumes.

The Bose Speakers are 1 ohm impedence. This is another problem. Using a factory amp to drive a non-factory speaker (5x8???) will likely have an impedence mismatch. Maybe an issue, maybe not, but there will be a power reduction (V squared over R)

I haven't come up with a good clean solution yet, but it is not rocket science..(it's radio science). You could always add an aftermarket amp and speakers and just use the pre-crossover signal that is in the truck... (I think the filtering actually takes place in the bass unit itself)...

Comments?

 

Why would you want to add speakers there? They just destroy the front imaging. You already have front imaging and bass from the Bose tube. You can improve upon the Bose system, but not by adding speakers at the rear pockets.

And the OEM rear speaks are 6x8.

 

im sorta of a newbie... how can you enhance the bose rear bass experience???

 

Im definitely curious as to how you power the rear speakers. The wiring harness off the head unit i bought has front/rear speaker wires - i assume you can just run some speaker wire to those speakers directly from the head unit.

Any thoughts?