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Questions & Answers
My mtx thunder 421d I
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.
My red light stay on all the time
Check your wiring and see that your power wire is not in contact with any part of the body of the car. I also recommend soldering the ends of all wires, to prevent them from splitting especially on the amp terminals.
Blown Voltage regulators
that first number most likely is 2N414A. Goto NTE cross refference web site and put this number in, it will show you a cross for it with a picture of the transistor to match it to the one you have. Hope this helps good luck.
I have a mtx thunder 421d. I've had it about 5
If you have proof of purchase(invoice or receipt) showing the purchase date and you are still within the warranty period then yes it would be repaired by MTX under the warranty guidlines, and by the way MTX is great at customer service and they are great to work with(very fair)!!!!
Keep in mind that the seal on the bottom of the amp cannot be broken or that will void warranty coverage.
Give them a call, you will be glad you did!
800 225 5689 - MTX Customer Service & Amplifier Service Center
Good luck !
I have a mtx 421d. can I over heat if I connect
The MTX 421d is a mono amp. It only has one output channel.
If you are asking about hooking up only one channel to the input, then no, the amp will not overheat. But the output will be significantly reduced. It would be best to use a "Y" adapter with a single female and two male connectors to split the channel into both inputs.
Hope this helps.
MTX Thunder problem
Make sure that your connection at the battery is still good-sometimes the wire corrodes up front when your system is installed for a long time-so check that out and of course the fuse that you installed a foot away from the battery so that you dont burn your vehicle down if a short occurs somewhere down the line
Help! Amp not turning on
Im sorry to have to inform you my friend, if you saw smoke, you burned one or more of the resistors or output devices inside the amp. Without a service manual, it will be a hard call on what exactly cooked. In alot of cases please forgive me for saying so, but the ampis not worth taking into a repair shop to be repaired, because of the high cost these days of labor. Its too bad there are no user replacable parts inside of these amps. Good Luck.
Ps Please do not forget to rate this thread?
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