Need Amp Help

[w.hardwick]

I just bought a JL 250/1 mono block amp and when i hook it up it makes the sub make a sratchy nose when i try to set the gain on it, it makes a popping static noise can some one please try and help

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[Innovative:Cory 10+ year member]

Check your ground first, if you do not have a good ground the amplifier can be looking for ground along the RCA path. If that doesn't do it, try changing to a different speaker, to see if scratchy-ness continues. If it does continue and you can eliminate the speaker, try changing RCA input by swapping to a different output on your radio. If it STILL continues it would be something inside the amp itself.