Question about Rockford Fosgate Power 1500.1BD Car Audio Amplifier

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T1500-1bd burnt mosfet

Amp was working fine but had drained the battery over a weekend and a burnt smell. the amp has a burnt mosfet and no other visible damage. I am unsure if this is the only problem and how to check for other faulty components. Any advise would be appreciated. I run the amp at 2ohm but plan to go 1ohm when repaired

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  • jrchitty1 Feb 10, 2009

    Thanks for the advise, This amp was only 4 months old when it failed and I Bought it from an individual on ebay so I Have no receipt from a dealer so I assume no warranty? I did check the resistors nearest the burnt mosfet and one was high and the one at the burn was infinite. I would like to try to replace the components I can test with a simple multimeter and try as I don't know who to send the amp to for reasonable price. By the way, I save a whopping $60 by not buying from a RF dealer! Thank you for your time & knowledge.

  • Perry Babin May 11, 2010

    I've worked on a lot of Rockford amps but I've never had a T1500-1bd in the shop. If you have no alternative and can send me a couple of decent quality photos showing the parts you know to be defective, I'll try to help. I doubt that it's going to be available for such a new amp but try getting a schematic diagram from Rockford. It would help quite a bit.



    babin_perry@yahoo.com

  • Perry Babin May 11, 2010

    It's a relatively new amp. If it's under warranty, you should send it to Rockford for service. I'll generally help people through repairs but these amps are relatively complex and if you have to ask for help on them, you should probably refer service to someone else. If it's under warranty and you tamper with it, it could void the warranty.

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The cap will help but If you can take the alternator off and take it to a rebuilder they can build you an alternator that puts out more amps which is a great for multiple amps to charge the battery faster and will give you more sound! More power to amp more watts and clearer sound!

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Fosgate's get very hot.My first amp was a fosgate and I freaked out because it got really really hot. And smelled bad. So I moved it so where it could get more air That should help you out a lot and the smell went away on its own. As for your battery dying. Basically your stressing out your battery and your alternator is having a hard time keeping the battery changed. I'm sure you see your light dim when a low bass note hits. Invest in a cap. This will help save your battery your alternator and should even sound better.

Posted on Feb 10, 2009

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