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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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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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

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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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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


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I want to hook up a crossfire bmf 12 to my 500s. It is a dual 4 ohm speaker which config will i get the most power out of the amp. Wired at 8ohm bridged or each voice coil on a channel. That amp wont run...


You are correct, the amp will not support 2 ohms bridged. your best bet would probably be to have one voice coil on each channel. You could run them in parallel on one channel. but you will be getting the same power to each sub as if you put one on each channel. If you run them at 8 ohm bridged you will be getting less than 125 wrms per voice coil because of amp inefficiency at such a high resistance. It will sound cleaner also if you have one voice coil per channel.

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I just needed some help with wiring my p8002 rockford amp to 2 fosgate 10 inch subs i just bought. there 4 ohms a piece and dual voice coil. i dont know much about car stereos but people keep telling me...


Well i tried looking up that amp, but Fosgate sight is down. So assuming that the best power out of your amp is 2ohms off the bridged hookup, and the subs are 4 ohms per coil, the best way is to only use one side of each speaker and hook it straight the the bridge. Only using one hook up wont hurt anything, its just for giving you wiring options. And when adding up ohms of speakers, it goes like this. If you had two 4 ohm subs, that'll give you a 2 ohm load. If you hooked up all your hookups, it would be like having four 4 ohm subs, and would give you a 1 ohm load.

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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 !

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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.

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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
4/2=2ohm

look it up google for diagram if you need one.

Aug 06, 2009 | Car Audio & Video

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Wiring diagram


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

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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

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