Question about Kenwood KAC-9152D Car Audio Amplifier

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Cant turn up the gain on my amp

When i turn up the gain on my amp my subs start to go crazy. I had an audio guy tell me that my deck was puttin out DC current to it and that was the reason i couldnt turn it up. Im still new to car audio so I dont know if he is just tryin to make a sell? Any help would be great.

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I believe you have a wire touching a ground somewhere in your car stereo circuit. Most likely there is a speaker wire in your dash that is the cause. Here is a reference: http://www.bcae1.com/brighead.htm
Also make sure the RCA's are taped up in your dash, they will create an entrance to feedback from the amp, which will inturn make your subs go crazy. Also, unplug each channel RCA from your amp and see if it stops, you may have a break in your RCA's causing a ground.

Posted on Feb 16, 2009

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Speakers cutting in and out at high volume


The amp is going into protect on the two channels powering the speakers. Turn down the gain on those two channels. You also may want to consider crossing over the speakers a little higher than they are now.

The rating on those speakers are way too high. 6.5's and 6x9's will take 50-100 clean watts tops before they start to break up.

The best solution to get it perfect is....unplug the subs. Turn the gain on the speaker channels all the way down. Then turn up the deck 80% as high as it will go. Play a song. Then increase the gain on the amp until the speakers are as load as they go without distortion. Shut off the car, replugg in the subs and do the same thing. Gain on sub channels all the way down, deck then to 80%, find a bass heavy song, then turn gain up until subs become distorted. If you do this procedure your speakers and subs will be "gain matched" to the proper levels.

Good Luck

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I cant get my jl audio w6 10s to give off much bass with the jl audio 500/1 amp


here is a manual for your subwoofers: http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf

use the wiring diagram for 1.5? (1.5ohm) with 2 speakers. the diagram for 3 speakers will not work, because it would bring the load down to 1 ohm, and the amp cannot go below 1.5 ohm.

to set up the amp:

under "preamp output section", on the "output mode" switch, select "amp filter"

to set up the levels: start with the amp gain pretty far down- with the input voltage on low for line level outputs from the deck, and on high for speaker outputs from the deck. now turn your cd deck as far up as it will go until it distorts, then turn the cd deck down to just where it stops distorting. now, you can start to turn up the gain on the amp.

on the filters, youll prolly want the cutoff filter around 100hz @ 24db slope. start with the infrasonic filters off, but, if you do get into them, try centering between 30 and 60hz on either, and, possibly dropping the cutoff filter to 80hz.

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Sony is not a bad brand if you use it correctly... This is what is happening my friend. You are what is called "clipping" your amplifier. What you need to do is make sure you are running your subs at the correct impedance or also known as resistance. Then make sure you are running them at the correct frequency, there is a turn tab on the amp to match the sub to the amp. Then never never turn the gain all the way up. This over works the amp and will wear it out much faster. This also does not actually give more power to the subs it just gains the power sooner then later. Never turn the gain more then half way up.. Hope this can step you in the correct direction my friend.

By the way plaztiksr4me kenwood is junk too :O

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why are you in stereo for subs? mono all the way.

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I have an Alpine MRD-M605 amp that recently has started having issues. My subs only produce sound when my deck is turned up full blast. The setup had been working for over a year with no problems. The subs...


If your deck is aftermarket; Does it have a dedicated Subwoofer output? if so, check the control in the deck (sub gain). If you are using a factory radio, and a high to low level adapter (speaker wires to RCA), it may be bad (not too uncommon) or check your fader front/rear any difference? Otherwise, you have one of two problems. A bad preamp in the deck or a bad pre amp in the amp. Both are fairly uncommon. More than likely it's a setting. Hope this helps

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1 Answer

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I dont know if this will help you but start at the deck and make sure that the outputs(RCA) arent crossed over to highpass and do the same at the amp make sure that its set for lowpass- set half gain -bass boost half gain- subsonic minimum - If that doesnt help try using an i pod with an adaptor that you can play it right into the amp this is to see if you are getting signal from the deck to the amp if it doesnt work with an i pod or mp3 plugged directly into it then you may have got you a blown amp going on- good luck with that

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1 Answer

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The best way to set up an amp is to start with everything on 0 Turn your gain all the way off, then turn the stereo up as loud as u would normally listen to it. With the stereo on, slowly turn the gain up until it sounds the way you want it. As for the Hz settings, for a sub you should have the crossover set to lpf, and the z knob adjusts what frequency your sub will play. Since you have a 10" sub, I wouldn't put it much below 125, because tens can't produce ultra low bass and it could damage the sub. Hope his helps :)

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Gain makes subs go crazy when turned up


HI DUDE UR AMP IS TO POWERFULL FOR THE SUB ... .... LOWER DOWN BASS IN UR PLAYER ... AND AMP .... TRY ADJUST BACK THE TUNE ... IT WILL B FINE ....

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1 Answer

Amplifier Problem


never ask geeksquad about amps lol check your ground wire connection and push on sub do you feel scratching if so its blown sub also never turn an amp up all the way it starts pushin dc voltage witch a 200 watt amp can blow a 800 watt sub dc voltage is not good for subs also up all the way can burn out the internal battery in the amp lets hope thats not it just make sure ground is good protection light means that the amp has power but a connection is not bien made sum where to complete the circut

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make sure you have the wires from the amp to the box, and the box to the subs hooked up right... red is positive black is negative

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