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Message: <blockquote data-quote="n2audio" data-source="post: 5584191" data-attributes="member: 540940">Leaving the neg connected is fine as long as you pull your fuse at the battery.Unhooking the negative terminal could be worse because when you connect the (+) first the amp "looks" for a (-) return wherever it's available.  Sometimes that can be the rca wire which can damage the low current rca's.Anyway - my only guess is the spark when you tried to replace the fuse is due to a small amount of capacitance in the wire -- I've had the same thing happen but it's never caused a problem down the line.I would replace the amp fuses, hook the neg back up, then replace the front fuse as you were doing originally.  Expect a spark, if you don't get one it's just a plus.</blockquote>

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