yes i must have gone through atleast 7 fuses before i switched to a circuit breaker. Although i was running a JBL 1200.1 on 60 amp fuses....no wonder they blew //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifOriginally posted by Jmac Yup, unless you're running sine waves for over a minute, it shouldn't be a problem ... you can always get a 140 ampere circuit breaker or a 120 ampere ANL fuse if you're going to be running bass tests for long periods of time ... They're the same price, although I'd go with the circuit breaker because it's much more cost effective.