Question about Alpine PDX-1.1000 1000W x 1 Car Amplifier Car Audio Amplifier

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Why does my KAC-8404 cut off at high volume bass?

Ive got 2 Kenwood KFC-HQ718 speakers and a Pioneer TS-WX301 sub hooked to a Kenwood KAC-8404 amp... the system was working fine up until a week ago...the problem is when i raise the volume above half, it works fine... but as soon as heavy bass kicks in, the amp cuts off for a few seconds then comes back on... n it keeps doing this if the heavy bass continues...wht cud b the problem and how can it b fixed?

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My uncl had the same problem and he went back to the audio shop twice...Then called me...I discovered that the powr cords they used were not thick enough,giving the amp a low current to work on...but if you have the original cords you got when you bought the amp...it might also be a weak power supply....try playing the music while driving on a high speed or while reving the car to give more voltage from the alternator...If that doesnt work...come and shoot me please...im out,PEACE

Posted on Dec 29, 2008

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Amp 101

1/0 wire to the amp or the amps will loose power

check the connections mainly the negative

wiggle the wires see if you get a cut out or not

a cap will help you give constant power to the amp and not allow them to drain on long bass notes

hope this helps

Posted on Dec 26, 2008

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I installed a Pioneer DEH-P800PRS head unit and 4 Kenwood KFC-1662S speakers in my 2003 Dodge Dakota extended cab truck. I used a Kenwood KAC-5204 2 channel amp connected in parallel. Sounds good at lower...


Hello.... sorry to hear about your problem. Bass is the ultimate evil of coaxial speakers. You have a couple of options here, and this is just my professional opinion because I do not know what your lifestyle details, such as truck space needs, type of music you listen to, budget, etc. If you are looking for alot of bass, the best bet would be to use 2 external amplifiers, 1 for the interior speakers, and 1 for a subwoofer. You would then need to purchase an electronic crossover. With this setup, you can remove all of the low frequencies from the coaxial speakers and put them where they belong, with the sub. You will gain EXCEPTIONAL clarity and a very high volume before distortion level. Again it will depend on what your budget is and if you are willing to compromise on some cab space. The only other option you have at this point is if you are wanting to play your music at high volume levels, you will just need to reduce the bass level as you increase volume. I hope this has helped. Good luck with your venture!!

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I posted a comment on your other post not nodicing this one. But commenting on the choice of amps, It would all depend on what the model number is on the pioneer amp. Also it would depend on what kind of sound you want. Could you get me the model number of that and double check your model numbers for the kenwood sub and amp. The amp that I show when I googled it was rated at 250 watt at 2 ohms no where near 1000. so if I have the wrong amp let me know, I would like to help. Thanks
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Need help


It should be better to use the Pioneer GM-7200M Amp with your subs.

For 8 ohm setup hook up this way:
Amp out+ to Sub1 +
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For 2 ohm setup hook up this way:
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1 Answer

Witch is better


hi there. ill start with the wiring. you should have a blue remote lead going to the back of your head unit, the power cable running straight from the amp to the battry, the earth should be earthed in a fairly decent place, any metal inside the car realy, and then your wires pos and neg from the amp to the subs. the reason why the kenwood might not have much base on it is to my knowledge, there should be a switch somewhere on the amp that will increase or decrease the power input for the speakers, if this is set very low then hense why theres not much base comming from them. if the amp is on and its giving something to the subs it probably isnt the wiring. try checking the amp for the switch first, if you cant find it try the pioneer amp and see if theres any diference.
dont hesitate to contact me if you get stuck


cheers, adam

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2 Answers

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If it was mine i'd want $200-$300 if in mint condition. Try a classified in the local paper or online ads.

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