Question about Pyramid 2CH 1000W CRYSTAL AMP Car Audio Amplifier

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Bought a car and this amp was in it(Pyramid Crystal PB781X 2ch MOSFET). it is missing the fuse. what fuse does it require?

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25 to 30 amp fuses are the most commonly used fuses in any amp and since yours is a 1000w amp, I would use the 30a.

Posted on Sep 05, 2010

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try: a shorter ground cable, a bigger ground cable or sanding the surface where you make your ground. a lot of amps will tell you the ground should be no more than 3 ft and for any the shorter the better

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1 Answer

Pb1281x pyramid crystal 2ch mosfet amplifier 1600w what size fuze i got a 20amp in it it blows when i got it terned up


Hello sunshanel,

You did not say what you have the amp connected to and what the impedance load is. It is only stable at 4 ohms and if a lower impedance is connected, say 2 subs in parallel, it would try to produce more power when you turn it up and would most likely blow the fuse. 20 amp sounds right for the amp. The power rating of 800 watts per channel is peak power, not RMS, and many low-end manufacturers tend to state bigger numbers in the ratings.

Hope this helps.

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sounds like the Impedance of the speakers does not match that of the amp, therefore the output stage of the amp is trying to compensate, driving the amps too hard and eventually causing the thermal cut out to activate. Check the ratings on everything are compatible before you start sending it off to be fixed.

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1 Answer

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