Friends Rockford amp may be shorting the fuse?

[dkc62 10+ year member]

My buddy has a Rockdord Fosgate Punch 100 amp and it has no fuse. The only fuse is the one up underneath the hood. So I undid his amp and put my soundstream amp and it didn't blow the fuse but when I stuck the Rockford back in it would blow. What would be the problem?

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[tRiGgEr 5,000+ posts]

What model number on the amp, What speakers is he using, What ohm configuration, How big of a power wire, and What fuse size...

 

[dkc62 10+ year member]

What model number on the amp, What speakers is he using, What ohm configuration, How big of a power wire, and What fuse size...

Model number is 100a 2

10in Rockford Fosgate the punch. The older modeland probably the cheapest

4 ohm mono

8 gauge

we went from a two blown 25 amp fuzes to a 30 amp blown fuse. Meaning they all blew.

It's a 100 watt system rms.

 

[tRiGgEr 5,000+ posts]

Hmm as long as you don't have the gain over half up it should not be doing that. That amp will produce around 125-175 watts on 13.8v. You can try a 40-50 amp fuse and still be safe. If it blows the 40 you will need to get the amp serviced.

 

[dkc62 10+ year member]

Thanks trigger. It's just weird that my amp was fine and it's rated at 120w rms and it's oldschool. I'll try a biggger fuse. Also he ran that amp since '99 and the fuse finally blew. He'll have to have it serviced then.