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Amplifier my factory amp in my 97 jeep grand cherokee limited is not putting out any base i only have treble, it is an infinty gold amp, any ideas?

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  • Jose Marrero May 11, 2010

    Need more info? has any speakers been replaced?

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Yes. Most likely your factory speakers are blown as I've seen this many times. They are co-axials (2 ways) and the woofer part of the speaker is blown or the surround is rotted and only the tweeters are playing. I also believe that the front door speakers are low frequenct. Are they playing or buzzing?? Let me know and I can confirm this as the solution. You need new speakers.

Larry T
Winona Lake, IN
http://www.cybersoundsaudio.com/cybersounds/vehiclepics.html

Posted on Jan 28, 2009

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2000 jeep grand cherokee wiring diagram


You have to cut the factory speaker wires on both sides of the amp and solder them together.(bypass the amp) Pull out the factory radio so you can identify the color of the speaker wires or look at the wire colors on the back of the factory speakers.

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a good way to find out is, if your lucky- you still have the plug connected to the wires in your dash. Buy a wiring harness from a place like Best Buy. The harness, when plugged in to your factory harness will have its blue wire in line with the factory amp wire. There also may be a Blue wire with white stripe, this also needs to be connected to the blue wire if the above doesn't work. If you dont have a factory plug anymore- bigger problem. brian.small@bobstgroup.com

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Tap into a signal wire (rear speaker wire) using a line level converter.
These convert the High level speaker wire output into low level RCA output that is accepted by your amplifier.
c5b61ef.jpg Get a good one Pacific Accessory Corporation (PAC) sni-35 is the best IMO.
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Then you will need a fused power wire from the battery,
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Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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yes, you have a few options. Chances are, its your amp. 
1st I would test the speakers - find the amp under the back seat, then test which wires go to the front speakers and use a AA battery to check if the speaker pops with those two wires and the battery.  If it does pop, its your amp needing replaced.  You can switch out that infinity amp for an aftermarket one very easy. Just use a testlight, or voltmeter to test the wires, and switch them to a new 4-channel amp.  
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I assume you used the correct Metra plug (70-1878) to install the radio. Ensure the blue and white wire on the Metra is attached to the blue and white wire (or solid blue) on the Sony. This will provide + turn on voltage to the factory amp.
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are the tweeters connected to a crossover?

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