Trying to determine proper fuse size

[captain_cactus7]

I recently got my vehicle back from my mechanic and realized he took the fuse that is connected close to the battery out and forgot to give it back. I have no idea what size it was or what size I'm supposed to use to replace it. I am running just a small 200 watt Memphis SRX1.250 system. I know it has 2 15 amp fuses built into the amp and someone told me the fuse at the battery should be the same size as those. But I went to a store to buy the fuse and the guy gave me a 60 amp fuse saying that would work just fine. So now i'm extremely confused.

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[LosIsATool 5,000+ posts]

I’d guess you have 8awg power cable. 60 is fine.