Question about MTX 4004 Car Audio Amplifier

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Mtx thunder 4004

When powered up light turns on for about 2 seconds then turns off and wont come back on until power is removed then hooked back up.

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Check for shorted output transistors

Posted on Jan 20, 2009

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My mtx thunder 421d I just got has the red light staying on all the time, I have hooked up a rca converter and the amp wont play my sub, is that light supposed to be red all the time.


The LED should be red. If you are not getting power to the sub, make sure the speakers are connected properly to the amp. Also make sure that the gain control is turned up. If it is all the way down, you will not hear anything from the sub(s). If none of that works, it is possible that you have a blown sub. If you smell a burnt smell near the speaker magnet, there is damage to the voice coil in the sub.

Feb 25, 2011 | MTX Thunder 421D Car Audio Amplifier

2 Answers

I just got a mtx thunder 6152 amp got it all hooked up its working but red light is on, should it be red or green?


http://www.mtx.com/caraudio/archive/NDM185.pdf .... go to this link for more help, it is the owners manual

Apr 24, 2010 | MTX Thunder 6152 Car Audio Amplifier

1 Answer

Can you help with my wiring?


The more amp you are pushing the better. Better too much amp then not enough. How many watts per speaker? less then the amp I hope. When you need decibles the more air you push the louder it will be. Enclose in a MDFB enclosure or plexiglass and feed towards each other and port the box to the sides. This will cause some annoyance. We ran 2 rockforts @1000 watts and abtained 137dc before the back windshield blow out,,lol

Mar 09, 2010 | MTX 6001 Car Audio Amplifier

1 Answer

Power issue


blown fuse?speakers on their way out? check the amp fuses, then the inline power fuse.

Feb 07, 2010 | MTX Thunder 81000D Car Audio Amplifier

1 Answer

MTX Thunder 81001 wont push subs


first of all you should check the minimal impedance your amp handles , if is class d it should handle between 1-2 ohms total impedance in a mono conection , meaning whatever quantity of subs you have hooked to your amplifier,their total impedance should the minimum the amp handles that way all the power from your amplifier will be used.

Jan 23, 2010 | MTX Thunder 81000D Car Audio Amplifier

1 Answer

Sub not working and red light on amp stays on?


the amp is under to much pressure get a bigger 1

Nov 18, 2009 | MTX Thunder 421D Car Audio Amplifier

1 Answer

Mtx 1000xd led light is flashing and the subs will not work


The light flashing usually means there is a short somewhere. Check your wires to make sure there are no slices and are touching. Also check to make sure you have your remote wire hooked up.

Sep 19, 2009 | MTX X Thunder 1000XD Car Amp

1 Answer

I need help hooking this up


"is the got two wires in the ground and remote turn on wie"
Can you be more specific about the wiring...where the two wires are connected to and where they come from, and I'll try to help you.

Mar 29, 2008 | MTX Thunder 895 Car Audio Amplifier

1 Answer

MTX Thunder TA81001 amp


A large capacitor between your battery and the amp may help. Your alternator is most likely strained by the amp's power consumption. If you can't get a stronger alternator or suitable capacitor, you may nbeed to replace your battery and alternator more often than normal.

Feb 29, 2008 | MTX Thunder TA7801 Car Audio Amplifier

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