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Boss 3500 Watt Monoblock Amp stops putting out signal

I have a Boss 3500 watt monoblock amp that works when the car is turned off but as soon as I start the car it stops putting out any sound. The amp is wired up to a 10 Farad capacitor that is wired up directly to the battery thru a stinger 200 amp solinoid switch that is used to turn on the amp and capacitor.

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  • zoomhead Jun 16, 2008

    I have a 1960's car with the same amp and im having the exact same problem. The amp works great with the car off, then as soon as I start the car, the amp quits...any ideas as to what your problem was?

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  • 631 Answers

What's the battery voltage across the B+ and ground terminals of the amp when the engine is running?

Does the amp go into protect mode when the engine is running?

Are you sure the head unit is still producing output when the engine is running?

Posted on Apr 10, 2008

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Posted on Jan 02, 2017

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Hello,

To run 2 subs, the amp would be a little small. The subs will run OK, they just won't be very loud.

It's usually better to compare and match up the RMS power rather than the peak power. The Sony XS-L10P5B sub has a peak power handling figure of 1200 watts, but the RMS is 300 watts. The Sony XM-ZZR3301 monoblock amp puts out 1100 watts peak, but only 330 watts RMS. They would work great together, 1 sub, 1 amp. But if you add another sub, each one would only be getting about 165 watts. They'd work OK, just not as loud as they could be.

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