Question about Ultra Linear UL-2200D Car Audio Amplifier

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Amp Will Not Stop Overheating

I have a MTX TC8001 2400watt amp 2xP312d2- Rockford Fosgate P3's 12inch dual voice running 2ohms on my amp and the amp says it supports it even had the spots labeld for 2ohms and i have a rockford 1farad Capacitor. I have the bass and Gain settings on my amp maybe a little less than half way up and i have my amp in a spot with PLENTY of windows i mean like 5 windows blowing on it and a fan and it will not stop overheating and shutting off... i can wait like 5 minutes and it will come back on. It takes about 30 mins to overheat. I dont no wat to do ? is my amp bad? i just bought everything brand new and i am using a complete StreetWire kit and 4gauge wires i checked all the wiring for the voltage and they all came back 12volts so they r fine but yet it still overheats? CAN ANYONE HELP ME PLZZ!? thanks

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Re: Amp Will Not Stop Overheating

You say you have 2 p312d2 subs. Ok so the d2 stands for dual 2homs (2 X 2homs voice coils per sub) , conecting in parallel the 2 voice coils of only one sub will create 1hom load to the amp, and if your amp is 2homs stable per chanel that means you are lowering too much your homs causing the overhwating to it.

Posted on Apr 05, 2010

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Re: Amp Will Not Stop Overheating

Wire them to 4 olm and start with turning gain down a bit and see if it still turns off. Sounds like your running an unstable olm load

Posted on Oct 21, 2015

Re: Amp Will Not Stop Overheating

I think your amp 400watts rms per channel. is your amp mono? if it is mono and you have 2 subs hooked up. i think your subs are 500 rms each then the amp is working to hard and does not support for 2 subs you need 1000 watt rms combined or 500rms x 2 channels @ 2 ohms. so 1000 watt rms mono amp @ 2 ohms or a 2 channel amp with 500 watt rms per channel @ 2ohms. im sorry but your amp dose not work i know it say 2400Watt max but you dont run subs on maxx all the time you need to look at rms watts per channel at 2 ohms

Posted on Sep 28, 2007

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Re: Amp Will Not Stop Overheating

You can't have two DVC subs running at 1 ohm. They can only be wired to 4 or 1 ohm. If they are parallel wired they are at 4 ohm.

Posted on Mar 01, 2009

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1 Answer

Does anybody know what watt this is. it's sosed to be a 2400 watt and why does it have 2 ports on each side to hook up speaker wire And what's the best way to run it with a 800 watt Rockford fosgate

dual voice coil subs hook up mono on amp, from amp - from right side + from left side of amp run to sub n then jumper wires from one side of sub to the other side goes negative jumps on positive and positive jumps on negative

Apr 03, 2015 | Rockford Fosgate Car Amplifiers

2 Answers

Need to know how many ohms this amp is

Safe down to 2 ohms, NOT a 1 ohm stable amp, it will be pushing it hard even at 2ohms but Fosgate's should be able to handle it providing that the install and all cables,wire,connections,etc. are sanitary!
Good Luck !

Jun 30, 2010 | Rockford Fosgate Punch 301S Car Audio...

3 Answers

Wiring for 2 subs for max performance

This amp is rated at 500 watts into a 4 ohm load bridged mono or 250 watts x 2 into 2 ohm load stereo. Do not go below that impedance in either case. The amp was meant to dissipate a certain amount of power, driving it to hard will lead to damage. Your speakers look like they are dual voice coils @ 4 ohms each. To get the max power while still saving your subs would be to parallel the voice coils on each woofer then run them in stereo with your amp. Stereo 2 ohm is 250 watts per speaker.

Dec 14, 2009 | Rockford Fosgate Punch 501S Car Audio...

1 Answer

Overheating amp problem...easially fixed, i think....

depends on the sub rating.

if subs are 2 ohm rated you can ONLY get 1 or 4 ohms..
2x2=4ohm series
2/2=1ohm parallel

if subs are 4 ohm rated wire in parallel

look it up google for diagram if you need one.

Aug 06, 2009 | Car Amplifiers

3 Answers

Wiring diagram

run them in sereis hooking them all up together and bridging the amp

Jul 22, 2009 | Rockford Fosgate Power 1500BD Car Audio...

1 Answer

I have a rockford fosgate x7 amp and the fan stop working and a little while after playing it shut off what do you think

replace the fan in the amp, sounds like the amp is overheating and the cut off is kicking in... you can try the amp while not driving and the car parked, put a fan, like a desk fan where the amp is so it flows over the amp fins, and run the amp turn it up and let it work, see if it still shuts off after that, if so then it could be something internal nut sounds like it is the fan to me... and i have worked with many an amp and system in cars and trucks... hope this helps you

Jun 25, 2009 | Rockford Fosgate Punch P5002 Car Audio...

2 Answers

Rockford fosgate p500-2 overheating

Cooling fans are your friend. You can power them with the remote and ground terminals on amp.
.A thumbs up would be greatly appreciated if this answer is helpful to you. rockford-fosgate-p500-2-overheating-lv2kkrmxrai4iihdvw4m3np2-1-0.jpeg

May 11, 2009 | Rockford Fosgate Punch P5002 Car Audio...

1 Answer

Is this ok?

yes 2ohm should be fine for that amp no problem

But dont bridge it any lower than 2 ohms.

Nov 26, 2008 | Rockford Fosgate Punch P4004 Car Audio...

1 Answer


I looked up that amp, it doesn't have a listing for 2ohms x1 but it has 2 ohms x 2 and its at 250watts. For this situation, I would recommend a different amp or different subs. Right now you are getting the most you can get out of your sub/amp combo, if you only have single voice coil subs. Which is common in the mtx preloaded boxes. Either you want an mono block amp stable at 2 ohms or 2 dual 4 ohm voice coil subs. If you got the subs you would wire the voice coils in series so you could get 8 ohms then the subs in parallel so you could get 4 ohms, which would be the best for that particular amp. Good luck.
-Andrew Hawkins

Aug 23, 2008 | Legend LA1490 - American Legacy Series 2 -...

1 Answer

Amp overheating and adjusting gain and frequency

Overheating in amplifiers is often caused by a speaker load of too low impedance. If your L7 is a dual 4-ohm voice coil, and if you're using the amplifier in bridged mode, that may be causing your problem. Dual 4-ohm subs, with the voice coils wired in parallel, present a 2-ohm load to the amp. Your amp is capable of running a 2 ohm load in 2-channel mode, but not bridged mode. The best fix with your equipment would be to re-wire the sub's voice coils in series, resulting in an 8-ohm load. The amplifier's power output will drop sharply, but you won't have problems with overheating in that configuration. There's a good chance that you'll still be able to get all the volume you want, even with an 8-ohm setup; otherwise you'll probably want to switch to a mono amp designed for a 2-ohm load.

Jun 23, 2007 | Rockford Fosgate Punch P5002 Car Audio...

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