Question about MTX Thunder 421D Car Audio Amplifier
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.
Posted on Mar 07, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Aug 20, 2010 | MTX Thunder 421D Car Audio Amplifier
May 26, 2010 | MTX Thunder 421D Car Audio Amplifier
Jan 31, 2010 | MTX Thunder 421D Car Audio Amplifier
Jan 23, 2010 | MTX Thunder 81000D Car Audio Amplifier
Nov 18, 2009 | MTX Thunder 421D Car Audio Amplifier
Jun 16, 2009 | MTX Thunder 421D Car Audio Amplifier
Jun 09, 2009 | Car Audio & Video
Jun 03, 2009 | MTX Thunder 421D Car Audio Amplifier
Nov 19, 2007 | MTX Thunder 895 Car Audio Amplifier
Oct 16, 2006 | MTX Thunder 421D Car Audio Amplifier
Apr 30, 2012 | MTX Thunder 421D Car Audio Amplifier
278 people viewed this question
Usually answered in minutes!