20 Most Recent MTX Thunder 1501D Car Audio Amplifier - Page 3 Questions & Answers

yes you can not run amps with your speakers being grounded un ground and then try

if your power light is on then check your preamps (sub out from head-unit).Maybe you need to turn on that output thru head unit's audio menu.Also when using dual voice coils if you wire them out of phase there will be no output

Although open shields on the head unit generally cause MTX amps to squeal, it can sometimes cause the symptoms you described. To check the shields, you will need a multimeter. The procedure is on the following page:

Testing for Open Shields on RCA Signal Cables

If the shileds are OK, we will have to check a few other things.

MTX never released any of their schematics.

What sort of problem are you having with it?

Have you confirmed that you have a good signal source and the speakers are in good working order?

If so, the amp has likely failed and will have to be repaired.

Let me know if you have any other questions.

just run the tweeters to the front speaker channels on the radio

CHECK YOURE EQ OR TRY TO BYPASS THE EQ FOR TESTING

ARE U USING THE CONTROLS THAT CAME WITH THE AMP?
USUALLY THE CONTROLS CABLE GOES BAD

Does the woofer move in and out in relation to the movement of the gain control?

The 1501 is very similar to the 81000 but there are important differences. The 1501 is a better amp.

If you turn the gain up and down, does the woofer move in and out in direct relation to the rotation of the gain?

What do you mean by "you only feel current going through subs"?

If the terminals were smoking, it's probably due to loose screws in the terminal block or wire that's too small.

Did the amp work properly after the terminal blocks smoked?

If it does it with no RCAs plugged in, the speakers or wiring need to be checked.

If the speakers and wiring are OK, the amp may have shorted output transistors.

You need to switch your meter to ohms and measure the resistance across them. You should read something near 4.75 ohms.

4.75 ohms would cause a constant tone on diode check or continuity.

Did you replace all 8 output transistors?

If not, are you sure that the other 4 transistors haven't failed?

Sounds like a vacuum leak or something to do with the vacuum system.

R435 is 39.2 ohms. If R436 is the other gate resistor, it's also 39.2 ohms.

It is too old for online manuals. Any colour light would show it has power and usually a red, green or blue LED. Red is sometimes reserved as a fault condition in conjunction with another power light. https://www.google.com/search?q=mtx+810d+amplifier+manual https://www.google.com/search?q=mtx+810d+amplifier ..

MTX will know that one. https://www.google.com/search?q=make+my+MTX+TERMINATOR+AMP+1+OHM+STABLE ..

See if the videos help https://www.google.com/search?q=mtx+terminator+tna251+RCA+sockets ..

Is a 2ch and 210watts peak power

What amp r u using