Just installed a JBL 4-channel amp running 80W/channel powering Polk db650's. Took about 5 hours. If there are any questions or anyone plans on doing this and needs help/advice don't hesitate to ask.
There is an audible improvement. I was hesitant at first, but I had this old amp not being used and some free time over the holiday weekend so I figured "what could it hurt". The highs out of the 650's are much clearer and definitely sounds like the stock 10W aren't powerful enough for aftermarket speakers. And as proof, the in dash tweeters are having a hard time keeping up. They're more crackly now, as if they'll blow soon. I'm only pushing half the power the amp puts out. If they do blow, I'll just replace them with the db1000
Just installed a JBL 4-channel amp running 80W/channel powering Polk db650's. Took about 5 hours. If there are any questions or anyone plans on doing this and needs help/advice don't hesitate to ask.
Awesome! Did you keep the factory head unit or buy an aftermarket one? I sure hope you took pics. If you kept the jbl cd player where did you split in to get a signal for the 4 channel amp? Can you give a description of the color of the wires?
Mostly, I'm wondering if anyone has wired the amp to the existing wiring for the JBL system.
I have the base model radio, but there's still a harness run down behind the rear seat...I'd like to know if I can wire into that instead of a full custom install..
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2007 DC 5.7 SR5 with black bench interior.
Smittybuilt nerfs, Polk audio speakers, and dirty.
He used 2 channels for the front speakers (4 of them) and 2 channels for the rear speakers.
Depending on how it's wired the load should be 2ohm or 8ohm on the front speakers, My guess would be 2ohm...
Amp's for the "highs" are not pushed as hard as amp's for the "lows" so it shouldent matter. Some people run all their "highs" off a 2ch amp with no problems...
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Originally Posted by ChiroHorn
What will you use to power the dash speakers? Aren't all four channels of the amp being used now? Stock head unit perhaps?
The dash speakers are tied into the front speakers. If you remove the dash grill, you will see four wires at the harness, then two wires going to the little speaker. The radio schematic also confirms this. My thought is that there is a crossover; the power goes through the dash speakers to the door speakers. None of the power is used from the stock non-JBL HU anymore.
I cut all the wires sending power from the HU to the speaker, converted it to RCA, then sent it to the amp. I then ran wires back behind the HU from the amp to send the amplified signal back to the speakers. I kept this stock HU but all it's used for now is CD/FM (no power for speakers). Power comes from the battery with an in-line 80A fuse, through a hole in the firewall below and left of the steering column (right where the carpet ends next to the kick panel), down along the door, and up behind the driver's seat. I split the power to run to the 4-channel and the bazooka tube. Ground is run to a driver's seat bolt (14mm). Signal to power the amp is tied in with the same one that was already run for the bazooka tube.
The schematic should be attached if I did it right.
Firewall from engine.
Firewall from inside.
Power along door.
Power and ground under driver's seat.
Amp with wires everywhere.
Wires run through dash from HU.
Battery and in-line fuse.
Just installed a JBL 4-channel amp running 80W/channel powering Polk db650's. Took about 5 hours. If there are any questions or anyone plans on doing this and needs help/advice don't hesitate to ask.
Thanks for the diagram Few more questions. Did you make an adapter to go from 6x9's to 6.5's in the front or did you buy it? If you bought it where did you get it? Where did you mount the crossovers that came with your components or is the db650 not a component system?
did you install the tweeters in the stock location? if so, how did you wire the tweeters up? i cant seem to get the answer anywhere. I can run my own wires but they plug has to be plugged in to play to the channel.
Inside the plug it connects both blacks and reds, so you can do that your self or you can do what I did and cut the speaker out drop a tweater in connect the tweater to the leads of the old speaker (I did this cause my tweaters came with a crossover and I don't have it anymore) The cap on the stock tweaters is a 3.3uf which puts the cut off feq at 9k I think. I was going to use 4.7uf that would put it around 5k but it was easier to do it this way...
Quote:
Originally Posted by Clayton @ Atkinson
did you install the tweeters in the stock location? if so, how did you wire the tweeters up? i cant seem to get the answer anywhere. I can run my own wires but they plug has to be plugged in to play to the channel.
4-Channel Amp Install Completed
2007 Tundra SR5 Double Cab: 5.7L, 4x4, TRD Package, Towing Package, Pyrite Mica, Rear-view Camera, Brushed Side Steps, Goerlich Xlerator true dual custom exhaust, Polk 651 all around, Bazooka Tube, Memphis 1" Silk Tweet
Re: 4-Channel Amp Install Completed
Re: 4-Channel Amp Install Completed
Few more questions. Did you make an adapter to go from 6x9's to 6.5's in the front or did you buy it? If you bought it where did you get it? Where did you mount the crossovers that came with your components or is the db650 not a component system?
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