Alpine amp KTP 445U install
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Joined: September 13, 2012
Posts: 11
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From: N. Hollywood, CA
Alpine amp KTP 445U install
Hello,
Having some problems installing this amp into my 2013 Mustang. Vehicle has stock ford radio (non shaker) and 4 aftermarket Pioneer speakers in doors/deck) no sub.
Purchased PAC FRD24 unit and just using the wiring harness that came with it. Made all connections from the Alpine 4ch amp (using speaker level signal) to the PAC wiring harness and then connected the 24 pin connector between the factory radio and vehicle harness. There is an additional connection on the back of the radio that goes to the vehicle (16 pin) but I left that connected. The back of the stock radio has one 24 pin plug and one 16 pin plug and the antenna.
Hooked it all up and it seems at first to work fine. I turn up gains on the amp and the sound level increases in the speakers so i know the amp is working. Problem is that either with no amp or with amp connected and set to min gains, the sound level is the same in the car--it's as if this Alpine amp is adding to the factory amplification instead of replacing it.
Am i missing something here? I thought that the Alpine amp was supposed to replace the factory amp? With or without the amp connected, the sound levels are the same.
Does the base model radio have an amplifier built-in that can't be bypassed? I looked all over and don't see an external factory amp anywhere.
thanks for any help.
Having some problems installing this amp into my 2013 Mustang. Vehicle has stock ford radio (non shaker) and 4 aftermarket Pioneer speakers in doors/deck) no sub.
Purchased PAC FRD24 unit and just using the wiring harness that came with it. Made all connections from the Alpine 4ch amp (using speaker level signal) to the PAC wiring harness and then connected the 24 pin connector between the factory radio and vehicle harness. There is an additional connection on the back of the radio that goes to the vehicle (16 pin) but I left that connected. The back of the stock radio has one 24 pin plug and one 16 pin plug and the antenna.
Hooked it all up and it seems at first to work fine. I turn up gains on the amp and the sound level increases in the speakers so i know the amp is working. Problem is that either with no amp or with amp connected and set to min gains, the sound level is the same in the car--it's as if this Alpine amp is adding to the factory amplification instead of replacing it.
Am i missing something here? I thought that the Alpine amp was supposed to replace the factory amp? With or without the amp connected, the sound levels are the same.
Does the base model radio have an amplifier built-in that can't be bypassed? I looked all over and don't see an external factory amp anywhere.
thanks for any help.
Bullitt Member
Joined: April 11, 2006
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Do you hear a difference in sound quality with the volume raised near max? I just added this amp to my 13gt with the shaker 500 system which I revamped with 2 pioneer 6x9s up front and an x920bt HU. I had the same concern when I tested the amp at lower volumes, but the quality is noticeably superior at high volumes (lvl 20-40)
Thread Starter
Member
Joined: September 13, 2012
Posts: 11
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From: N. Hollywood, CA
I usually listen at only 1/3 max most of the time so i never really cranked the volume near max. At my listening levels I noticed no significant improvement in overall volume or bass response. Maybe it's because I have the factory stock non-shaker radio ?
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Joined: January 22, 2013
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You have to use the pac audio interface as well as the harness. The interface takes down your radios signal and gives you line level adjustment. from the alpine unit, splice back into the pac audio harness, but make sure the head unit output is not going back into the factory harness as well. That could be your problem. At least that's how mine is hooked up
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