mtx 421 amp?

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=76494
Printed Date: May 13, 2024 at 4:19 PM

Topic: mtx 421 amp?

Posted By: mejohll
Subject: mtx 421 amp?
Date Posted: April 19, 2006 at 9:56 PM

I ordered an MB Quart RWE 304 to hook my 421 to. They sent the 302 instead. If I run this amp at 1 ohm will it fry the amp, sub, or both? The enclosure is .84 cu. ft. sealed and the box says the sub will handle 500 watts ( doesn't specify rms or max).Thanks for your help.

Mark

Replies:

Posted By: Aruman
Date Posted: April 20, 2006 at 6:53 AM

that mtx amp is NOT 1 ohm stalbe so why run it at 1 ohm? at 2 ohm you will get more than 420 watt rms because mtx amps are underrated, and if that sub MB Quart RWE 302 is 500 watt RMS or MAX, that amp at 2ohm will be more than enough.

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Shaking The Neighborhood

Posted By: mejohll
Date Posted: April 20, 2006 at 8:14 AM

Yeah I know the manual says it isn't 1ohm stable. I was just wondering if anyone had done it successfully. I can't run it at 2 ohms because the sub they sent me is dual 2 ohm instead of the dual 4 ohm that I ordered. I guess I'll just return the sub and get the correct one. Thanks.

Mark

Posted By: luckydevil
Date Posted: April 20, 2006 at 8:25 AM

Just installed a 421 last weekend. The birth sheet said it was underrated by 69watts, so that would make it just under 500watts @2ohm and 14.4v.

Do not run that amp at 1ohm. Return the sub like you said and get the correct one.

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