stereo amplifier question (I know wrong forum....but nobody's in the audio sections!)
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stereo amplifier question (I know wrong forum....but nobody's in the audio sections!)

  1. #1
    Ralphs club member LSXINDUSTRIES's Avatar
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    Default stereo amplifier question (I know wrong forum....but nobody's in the audio sections!)

    I know there is a audio-specific section, but nobody frequents there? I have a kicker ZX650.4 4 channel stereo amp, running 4 kicker 6.5" component speakers. The amp shuts off after playing @ high volume in under 5 minutes. It will turn back on when the power is turned off and back on again. Im thinking its temperature related....because once it starts doing it, it gets worse and worse. My amps are under by back seat, but my kicker 1000w sub amp is also back there working hard, and it never skips a beat. The audio isn't turned up too loud, no distortion is present and it sounds great, which is why im leaning towards a temperature issue. Is there another 4ch amp that can better withstand warm temperatures better? Do you think the kicker amp is possibly just defective, or on its way out? The input gain is below 1/2 way
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    New here Beer:30's Avatar
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    Quote Originally Posted by LSXINDUSTRIES View Post
    I know there is a audio-specific section, but nobody frequents there? I have a kicker ZX650.4 4 channel stereo amp, running 4 kicker 6.5" component speakers. The amp shuts off after playing @ high volume in under 5 minutes. It will turn back on when the power is turned off and back on again. Im thinking its temperature related....because once it starts doing it, it gets worse and worse. My amps are under by back seat, but my kicker 1000w sub amp is also back there working hard, and it never skips a beat. The audio isn't turned up too loud, no distortion is present and it sounds great, which is why im leaning towards a temperature issue. Is there another 4ch amp that can better withstand warm temperatures better? Do you think the kicker amp is possibly just defective, or on its way out? The input gain is below 1/2 way
    Check the fuse(s) involved with THAT amp's power supply. Most common problem leading to hot amps is -weak fuse(s). The last two amps I have seen do what you are saying had fuses that had corroded and were almost worn-through. So, they were cutting back the current going to the amp. This makes the power supply work overtime and heat up.
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    adding to that above, make sure wiring is large enough or a voltage drop can cause more heat, also depends on the install does it have enough airflow? is this problem new or has it always done this since new?

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    Marine Organism Forkin' Crazy's Avatar
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    Adding that again, check your connections. Loose grounds, etc can cause resistance = heat.
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    Default amp issues

    Had the same problem with my sons car after installing new stereo. The size of the wiring is to small and will not carry the load. Replaced and up-sized both battery and ground, problem solved . I believe it is number 8 cable you need. Most good stereo shops will be able to help. Good luck..

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    also check if there is a protection light on the side of the amp, when it shuts off does that turn on??? Its possible you have a speaker thats starting to go thats causing it to go into protect.

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    Lord of the Drinks Havasu Hangin's Avatar
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    If the sub amp is class d, it will run cooler than a class ab.

    Make sure the power/ground supply wires are overkill, and get some fans to run some air over the cooling fins.
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    Senior Member 77charger's Avatar
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    Quote Originally Posted by Havasu Hangin' View Post
    If the sub amp is class d, it will run cooler than a class ab.

    Make sure the power/ground supply wires are overkill, and get some fans to run some air over the cooling fins.
    You forgot to remind him get some square subs too.

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    How is it wired like how many speakers per channel are they bridged what ohm are the speakers is the amp 2 ohm stabile there's alot it could be make sure you have a good Sizw power wire with same ground and make sure you have all good connections

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    Ralphs club member LSXINDUSTRIES's Avatar
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    Thanks for all the info. The problem is not with the sub amp, it is with the amp powering the 6.5" component kicker speakers, full range. It is a 4channel amp, pushing 4 speakers. It is not bridged, each speaker has a dedicated channel. It is juiced by 3 optima bluetop batteries, but I need to verify the gauge of wiring that is powering the amp, as you all recommended. Definetly a heat issue, because it does it faster / quicker and to a worse degree when its hot outside and the stereo has been on for 10-15 minutes at a decent volume. There is fans under the seat where the amps are, but they dont have anywhere to vent to, it is a sealed seat base. However, taking the seat off so they have unlimited air dosen't seem to fix the problem. Also, the sub amp is also a kicker, is in the same atmosphere, and does not have the problem. So im leaning towards either too small a power wire, a bad ground, or a fried amp? Also, if the power wire is as large as the wire supplying the Sub amp, and the Sub amp is fine, that should rule out that theory, no?
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    unhook the speaker wires at the amp and leave one running. See if it still happens. If it does, unhook all speakers and see if it happens. Sounds to me like a wiring problem. Is it turning off or going into "protection mode" ?

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