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Wiring a Sub Amp Before the Bose Amp

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Old 02-19-2004, 05:31 PM
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Default Wiring a Sub Amp Before the Bose Amp

The solution is to tap into the outputs at the headunit BEFORE they get to the Bose amp. Remove the factory HU, and remove the large Black/White harness from the back of the head unit. Turn the harness so the wire side of the harness is facing you. The rear speaker outputs from the HU are the (4) wires in the cluster in the white section of the harness. There should be (from right to left) a brown wire, another brown wire, a blue wire and a black wire. The brown wire on the right is the (L+), the next brown wire to the left is the (L-) wire, the blue wire is the (R+) and the black wire is the (R-). Splice into these and then connect the converter respecivly. Now, the yellow wire next to the orange one at the end of the black harness will work as the amp turn on lead if you splice into it. Make all the connections to the amp and sub. Remember to use the correct sized wire and fuse.
I want to install an amp to drive a sub on my 2000 SSEi. I ran across this info from an old post detailing the process for tapping into the pre-amp output between the head unit and the Bose amp. I can't find if this suggestion has ever been verified. Does anyone know if this procedure is correct?
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Old 02-22-2004, 05:37 PM
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Well, I tried this procedure...and it won't work on a 2000 and newer Bonneville with the BOSE system. At least on my car, the head unit uses a single ribbon cable with embedded circuits for all connections, so the wire colors as described won't work. Also, I don't see any way to splice into the integrated lines in the ribbon.
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Old 02-29-2004, 12:25 AM
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I wonder if you could go to the factory amp and cut into the wires right before it goes into the amp
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Old 02-29-2004, 12:26 AM
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I wonder if you could go to the factory amp and cut into the wires right before it goes into the amp
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Old 03-03-2004, 12:07 AM
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That'* what I ended up doing. it was an easy job after I finally found the wiring schematics to dteremine the right colors. I'm going to post a "step-by step" with the colors when i get some xtra time.

Jim
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Old 03-03-2004, 01:43 AM
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How Does it sound? Did it make a big difference? Thinking about changing the wiring in my car I have it ran at my 6x9s and its sounds horrible. Try anyting to get beter sound from my speakers
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Old 03-03-2004, 11:29 AM
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It sounds 1000% better....well worth the time and little bit of $.

I would suggest that b4 you go the sub route, if you haven't done so already you should replace your BOSE 6x9 deck speakers with something better (and there are lots of better 6x9'* out there). You'll really be surprised at what a difference that simple change will make. I follwed that advice after reading it on this board...and everyone was right.) I ended up putting in a set of Pioneer 6980 4-ways that I found online for about $60.

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Old 03-03-2004, 12:33 PM
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I just spent my Sunday changing the 6x9s and it was definitely an improvement. Soon as I get some free time I'm going to get in the truck and try to figure out the wiring by the amp to run my subs off of definitely looking forward to the improved sound.
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Old 03-10-2004, 10:03 PM
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Default Re: Wiring a Sub Amp Before the Bose Amp

Originally Posted by JHE757
The solution is to tap into the outputs at the headunit BEFORE they get to the Bose amp. Remove the factory HU, and remove the large Black/White harness from the back of the head unit. Turn the harness so the wire side of the harness is facing you. The rear speaker outputs from the HU are the (4) wires in the cluster in the white section of the harness. There should be (from right to left) a brown wire, another brown wire, a blue wire and a black wire. The brown wire on the right is the (L+), the next brown wire to the left is the (L-) wire, the blue wire is the (R+) and the black wire is the (R-). Splice into these and then connect the converter respecivly. Now, the yellow wire next to the orange one at the end of the black harness will work as the amp turn on lead if you splice into it. Make all the connections to the amp and sub. Remember to use the correct sized wire and fuse.
I want to install an amp to drive a sub on my 2000 SSEi. I ran across this info from an old post detailing the process for tapping into the pre-amp output between the head unit and the Bose amp. I can't find if this suggestion has ever been verified. Does anyone know if this procedure is correct?
Yep, that is how I have my sub run, it sounds great!
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