Bypassing JBL amp: where to install bass blockers for tweeters/midrange?

Hi all,

I have a 05 DC with the 8-speaker JBL. I'm replacing my head unit, and (with the Metron 80-8117 bypass) am using its amp rather than the stock JBL amp, but keeping the OEM speakers. But I have some questions I haven't been able to answer:


1. Crutchfield said I need bass blockers. I'm presuming this is for the tweeters, but since there's no blocking (presumably) occurring from the new head unit, would I also need blockers for the front midrange speakers? If so, would these be the same 5000 Hz bass blockers I got for the tweeters?

2. Where in the circuit do I install them? I wanted to install them where the Metron bypass connects to the existing connector (by the old amp), because then I don't have to open the door. But since the tweeters "loop back" to the other speakers, does this mean I have to wire the blockers right next to the tweeter?

3. And again, if I need blockers for the midrange, where in the circuit do I install them?

Thanks!

Josh

 

It's pretty easy to remove the door panels. You would be better off to go ahead and replace the JBL speakers. The 15 year old woofers in the front doors are usually shot or will be soon. The woofers in my 2006 the foam/rubber ring around the perimeter of the woofers was falling apart.

If you want to go ahead with JBL speakers and bass blockers. You can look at the wiring diagram in the pdf of the factory wiring diagram in the link below.

https://drive.google.com/file/d/0B-5MhfqaHsHObmt6RDVhOGtKWjA/view

I think this may be correct but you may need to verify

Left Front Tweeter + Pink
Left Front Tweeter - Violet
Right Front Tweeter + Light green
Right Front Tweeter - Blue
Left Front Subwoofer + Green
Left Front Subwoofer - Blue/white
Right Front Subwoofer + BLACK / YELLOW
Right Front Subwoofer - WHITE/ blue

Left Rear Mid + Black
Left Rear Mid - Yellow
Right Rear Mid + Red
Right Rear Mid - White

 

Thanks,

Yeah, I'd like to keep the OEM speakers for now. Thanks for the wiring colors, too, but that still leaves me with the questions of where to wire in the bass blockers. And do I need ones for the midrange also?

Josh

 

The factory JBL amp is 6 channels. 2 channels front door mids and woofers. 2 channels front door tweeters, and 2 channels rear door speakers. You're going to a 4 channel set up. Put the bass blockers on the tweeters only at the speaker and see how it sounds. It will be easier to get rid of when you replace the JBL speakers in the future with some component front door speakers. The tweeter cover comes off with a gentle tug and you have easy access to the wires.