Question about MA Audio HK4000D Car Audio Amplifier

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Ma audio hk802sx

I hooked it up and it pounded my speakers too hard,so I got high power subs,but when I hooked it back up I put the ground wire in the positive spot and the positive in the ground wire spot.I heard a spark,then I hooked it up right and It was working but not very loud like it was,I think I popped the internal fuses but don't know what they look like and have never changed anything internally.Usually the fuses are on the outside,but in this one they are inside and I just bought it new yesterday.how do I know where the internal fuses are,and what do they look like?I have the cover off but see no fuses.

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All fuses are going to be external (adjacent to the power terminal block).

If it's new, return it. It's under warranty. Any tampering will void the warranty.

Let me know if you have any other questions.

Posted on Aug 23, 2008

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1 Answer

When i hook my amp up it gives no power to sub and cuts off all audio, why


You mean it cuts off the audio to even your inline speakers? If so then u have a short and its putting your car stereo into protect. Recheck where u spliced into the speaker wire. If even 1 strand of wire is crossed it will cause a short

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I have a jl 500/1 amp hooked up in my car and the power light comes on for about 5 seconds then turns off. no sound out of the subs. it is hooked up to a factory deck through a high to low level converter....


hook up the remote wire ( or make sure its hooked up good) check your ground! ground wire not big enough awg wire and put on bare metal not more than 1 foot away from amp. bad ground will cause this.

Sep 12, 2011 | Jl Audio 500/1 Car Audio Amplifier

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I have checked all connections to my amp battery,head unit,remote or trigger wire,fuses,power cable,rca leads,ground wire,amp has a green led light on it indicating if it works ok,red if it`s not,light...


Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.

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1 Answer

Amp burned out but fuses still good?


this is caused by inproper wiring from the speakers/subs to the amplifier.. an amp will still put out power to subs and speakers when it's wired improperly but it won't last for very long doing it... 6 months is longer than usual....

Dec 05, 2009 | MA Audio M1900XE Car Amp

1 Answer

No power


You probably have ONE of the speakers wired out of phase.

If the speakers are wired correctly, you may have the crossover set to high pass instead of low pass.

Let me know if you have any other questions.

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Sony Xplod 500w green power light no sound


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So your left + will be left + and your right + will be in the right + but put the right (-) where the left (-) is and left (-) where the right (-) is. If that doesnt work, then that means that you shorted out your audio out channels. the only way you can fix that is if you have good soldering skills. But other than that I'de say scrap it, unless you have the high outputs and then buy another amp, some mids and highs and connect the mids and highs to the xplod

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1 Answer

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1 Answer

MA Audio HK802SX 4400w Amp


hi, sounds like u have a problem with the remotebass connection socket. the socket has little pins inside, check to see if they arent touching each other. also try not using the bass control, then try one sub at a time. u may find that one of the subs or sub spk wires cub be faulty. cheers.

Jul 29, 2007 | MA Audio HK4000D Car Audio Amplifier

1 Answer

Stop putting out sound to subs


Ok This is a two channel High Current amp. It is stable to one ohm. If the Subs are single voice coil at two ohms the they have to be wired in Parallel that means (Red +) (Black -) are connected to the + and - of another sub and then the (RED +) (Black -) from both go to one output channel of the amp. You pair the other two in the same fashion on the other output channel. If you are getting no output (sound) at all first check if the amplifier is going into protect. (Usually indicated by a red led on the unit. If it is connect only one Sub to each output and see if the protect LED goes out. If it does then you should have sound at the subs. If not check that you have the sub output enabled on the HU some head units do not come with the sub output enabled on the HU. If every thig is enabled, with only one sub connected to each output and the protect LED is not on then your amp is probably blown and needs repair. Nice thing is that MA has a great warrenty policy. Check and make sure the protect LED is off. If it is on you probably have the SUBS wired wrong

Jun 23, 2007 | MA Audio HK802SX Car Audio Amplifier

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