Question about MTX JackHammer JH202 Car Audio Amplifier

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My ams is messed up

Why will my light come on after my sub hits twice?

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This is an impedance crash in other words your signal in is no good (replace RCA jacks) or your signal out is no good check wires for proper connections and or continuity and replace wires as needed or correct wiring or phase.

Posted on Feb 04, 2009

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Posted on Jan 02, 2017

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1 Answer

Sub problem with kenwood deck


well sounds like you crossed a wire somewhere. I would go through all the wires and check all the fuses on the amp and car.

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1 Answer

Kenwood CD player


Most car audio devices (like head units and amps) require a REM (remote) line to be connected to a switched power connection. This switched power is on when the car key is set to ON or Accessories.
Not knowing what Sony unit you had, I can't be sure, but it is likely your Sony had higher voltage preamp outputs than the Kenwood, as the KDC315 has 2V outputs.

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1 Answer

I have a few problems. i have 2 amps and 4 subs. first problem is when i connect one amp to my speakers it just hisses and crackles. this never happened before. when i turn up the gain to try and get...


The first amp, sounds like there is straight power going through the gain instead of it being limited. The second amp...hook the other subs up to it and see if it sounds ok. If so, then the subs are messed up. If it sounds the same, make sure the subs are connected correctly.

Oct 21, 2009 | Car Audio & Video

1 Answer

My kenwood kac-929 1000w amplifier is not powering my sub


unless you are a technician do not mess with the amplifier.
it takes years of school to learn electronics. unless it is a blown fuse or something simple,you will never fix it.
i did kenwood warranty for 8 years and the amplifiers are difficult to repair.

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2 Answers

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unscrew the plexiglass and try to get to the light and mess with it to see if it shook something loose, if that doesnt work, you might have to buy a new light....hope this helps!!

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1 Answer

Green light turns red on hard notes with kicker 750 mono amp


First off, never, ever replace a blown fuse with a bigger one (especially one that is almost twice as big) unless it's an absolute emergency. Most of the time, the reason a fuse blows is because of a problem with the device (in this case, the amp). By installing a larger fuse, there's a very good chance the problem will become permanent (i.e. busted amp).

The amp could be going into an overcurrent mode when the bass hits and power cycling itself to try and reset the problem. If this is the case, take it to a local electronics repair shop and see what they can do.

It's also possible the input voltage to the amp is dropping too low during the bass hit, making the amp restart. Try putting a 1.0F or higher capacitor on the battery to buffer the power during the bass hits.

Mar 16, 2009 | Kicker (ZX750.1) Car Audio Amplifier

1 Answer

Sub Selectroin


try to find a the specs for a box for those subs. A box has a great deal to do with highs, mids and lows.

Jan 09, 2009 | Car Audio & Video

1 Answer

Subs not hitting


remote wire turning on amplifier?
Ground for amplifier?
Gain improperly set?
Radio output crossed over above tuning freq. of enclosure?
Just suggestions. Not much info to go by.

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1 Answer

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Hit menu/Set , then find the option that says Initial setup, then find receive mode, then choose manual, and then if you want to receive a fax you need to hit the Hook button

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