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Premium Member
1997 ETC
4,931 Posts
Discussion Starter #1 (Edited)
I'm posting this as a guide for those who simply just wish to do away with the paper Bose speakers but wish to still use the factory amplifiers. The Bose system in these Cadillacs have a Bose 2ohm 100w amplifier tied to each 2ohm Bose speakers. I got tired of the paper cones on these speakers blowing, i went through two sets of 6x9's and 4" door speakers. But i wanted to keep the factory setup, i didn't want to have to rip out the entire system.

And then i found Infinity's Reference line

For the 6x9's i went with Infinity Reference 9632CF 2-way speakers:
Power Handling, RMS:100 Watts
Power Handling, Peak:300 Watts
Sensitivity (2.83V @ 1m):94dB
Frequency Response:46Hz - 21kHz
Impedance:2 Ohms ( this is why they'll work with the Bose amplifiers)
Mounting Depth:3-1/16 inches

They feature a tweeter that can be disabled or enable via a button on the speaker itself. I was still able to use the factory top mount bracket for the rear shelf, since these mount through the top i had no issue there, my problem lied in mounting the factory Bose amplifiers to them, So here's what i came up with.

I extended the factory wiring from the amp to the speakers using the same gauge and color for consistency, and relocated the amplifier above the wheel well, placing a microfiber cloth underneath it to keep it from sliding, i kept the perforated side facing up so that it can still breath and lessen the chance of it overheating ad tucking the wiring behind the cover to the RIM and trunk fuse panel

Do the same for the passenger side. I also went this route because i tried the zip tie method to the bottom of the infinity speaker but that resulted in the amplifier vibrating pretty loud and increasing the risk of damage to the amp. With this relocating of it, i ensure it's out of harms way, still looks clean and will still attain efficient cooling.

Next up came the doors. The factory Bose speakers feature a proprietary mount that's part of the speaker itself, unlike most after market speakers it has 3 mounting screw holes, making me really scratch my head as to how i was going to achieve this task, but persistence and patience is key.

Like the 6x9's the bose 4" door speakers for my Eldorado also run at 2ohm with a 100w 2ohm amplifier tied to them, again Infinity Reference line came through for me

I went with a pair of Infinity Reference 4022i 4" speakers, like the 6x9's these are also 2-way featuring a tweeter that can be disabled or enabled at the touch of a button on the speaker itself:

Bose on the right, Infinity on the left

Power Handling, Peak:100 Watts
Sensitivity (2.83V @ 1m):92dB
Frequency Response:85Hz - 21kHz
Impedance:2 Ohms
Mounting Depth:1-15/16 inches (48 mm)

I started out with a sheet of MDF board from home depot

Using the backpart of the speaker grill that came with these i cut the 3.8 or so inch hole

I then place the Bose speaker on top, and cut the outside mounting area

The result

cut out

I sprayed these black, and first did a test fit with the speaker, perfect fit. so then using liquid nail, i secure the speakers to these cut outs, then allowing it to dry, then placing a bead of liquid nail to the mount speaker mount cover itself, and placing the speaker with its new mount on it, and allowing it to dry for about an hour

The result

The grill still fits over these perfectly.

I wanted to ad a subwoofer and amplifier for a little more kick, so i went with an Infinity Reference 1062w 10" subwoofer that runs at 275w rms @ 4ohms

and an Infinity Reference 1300a Mono class D amplifier

As for the Enclosure i went with a Scosche EFX SEV 10CC

Since i had a Orion Amplifier and 2 10-inch Kicker subs before i used my existing wiring, cleaned up my Inline fuse in the engine compartment near the battery and proceeded with a fairly straight forward install.


72,92,02 Eldorado
185 Posts
you did get creative. Nice job.
I still need to write mine up.
I'm building a fiberglass box to fit the trunk side at the moment.

03 STS
2,527 Posts
Cool. Been told aftermarket stuff is usually better due to improved materials used. And the impedance of new speaker must match old. I thought it was 1 ohm? Or 2

1980 Eldorado, 1974 Talisman, 2004 Volvo C70, 1975 Fleetwood 'd Elegance
7,958 Posts
Wonderful way to update with out destroying the original interior! :thumbsup:
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