amp keeps shutting off

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115765
Printed Date: May 11, 2025 at 10:46 AM

Topic: amp keeps shutting off

Posted By: pcummings32
Subject: amp keeps shutting off
Date Posted: August 19, 2009 at 6:22 PM

my friend has two MTX 12"s that handle 200 RMS each and a JH300 amp that pushes 300 RMS MONO. The amp keeps shutting down. When the system is turned on it hits for a minute or two then the amp shuts down. can anyone give me some help PLEASE

Replies:

Posted By: i am an idiot
Date Posted: August 19, 2009 at 6:37 PM

Do you have any idea about the impedance of the speakers? Are they single or dual voice coil? Is the amp a 1 or a 2 channel? Do you have the amp bridged, or is it wired in stereo? What is the minimum safe operating impedance of the amp?

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Posted By: pcummings32
Date Posted: August 19, 2009 at 7:22 PM

they are single 4 ohm VC and its a single channel amp

Posted By: pcummings32
Date Posted: August 19, 2009 at 7:24 PM

the amp is safe at 2 ohm and its wired in stereo( not bridged)

Posted By: DYohn
Date Posted: August 19, 2009 at 7:28 PM

That amp is rated to handle a 2-ohm load so it should be OK with those speakers. It is a mono amp so it is not in stereo and there is nothing to bridge. Does the protection light come on? What is the system voltage when it shuts down? What is the ground return resistance? How did you set the gain?

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