i have a zapco ag750 that blows one of its three 25amp fuses when ever put power through it. they hold when the volume is down but as soon as i start to turn it up i loose the sub. this was happening near the end of last summer so i just pulled all my equipment and now i want to start looking in to getting things fixed up for next season. i live in st. catharines(niagara) ontario and was wondering if anyone knows of where i could get my amp looked at.

 

You are just running it 4 ohms?