help with amp fuse

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=35105
Printed Date: July 19, 2025 at 8:36 AM

Topic: help with amp fuse

Posted By: lilwayne380
Subject: help with amp fuse
Date Posted: July 06, 2004 at 12:43 AM

what size fuses go in a amp? it's 400w optimus

Replies:

Posted By: chevyman26
Date Posted: July 06, 2004 at 1:42 AM

The same size that came out of it posted_image !

But seriously,

check out their website for info or a detailed picture of your same model, or you may be able to see the fuse in a picture on ebay if you can find a listing for your same model. Otherwise, post all of the info that you have on it (is 400W the claimed peak power or is it RMS, how many channels, model #, etc.) and some of the other guys on the forum should give you a pretty good idea of what to put in there.

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You'd better get me out of this lord... or else you'll have me to deal with. -- Hunter S. Thompson "F.A.L.I.L.V."

Posted By: kgerry
Date Posted: July 06, 2004 at 10:24 AM

for that amp probably about 30 amps as i'm sure it's far from the true 400 watts it claims.....

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: kfr01
Date Posted: July 06, 2004 at 10:41 AM

If you can't find it, error on the small side.

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New Project: 2003 Pathfinder

Posted By: archemedes
Date Posted: July 06, 2004 at 2:03 PM

optimus amps are out of production (I think) they were built by various companies for radio shack, and most used a 30 amp fuse

Posted By: Alpine Guy
Date Posted: July 06, 2004 at 9:48 PM

I would start at 20 amps to be on the safe side, if it blows when you crank it, go up to 25, then 30 if it blows again. But i doub't it will blow on 20amps.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.