Fuse Size

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=20171
Printed Date: March 15, 2026 at 8:55 AM

Topic: Fuse Size

Posted By: mrdragon
Subject: Fuse Size
Date Posted: October 16, 2003 at 1:37 AM

Hi guys,

I am planning to install a 4 channel amp into my car system, the amp is rated at 100W MAX/CH X 4.

Can someone tell me what fuse size should i be using when placing near the battery in case the amp blow. My amp got 2 X 25 amp blaze fuse.

Thanks guys :)

Replies:

Posted By: Ketel22
Date Posted: October 16, 2003 at 1:53 AM

you would only need like a 10amp fuse but i would suggest maybe a 16amp.

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Posted By: bberman1
Date Posted: October 16, 2003 at 9:04 AM

If you have 400 watts (100 X 4 channels) then you would need a 30 amp fuse. But from the fuse rating on your amp 2 X 25 it is capable of putting out 640 watts or 160 per channel. Since it is capable of putting out the extra power I would go with a 50 amp fuse.

Posted By: italnpimp59
Date Posted: October 16, 2003 at 11:13 PM

yeah always fuse at the battery equal or a little bit less that what is in the amp, NEVER more than what is in the amp though!

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