Question about Pyramid PB1217X Car Audio Amplifier

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Green and red light are on my pyramid amp and its not working

I just bought a pyramid PB1217X artic series and i bridged my two 10's and it quit working then it started working and now it doesnt at all? the red and green light comes on and when the green light goes off when i turn the car off it bumps once and the light shuts off. whats wrong with it cause i reconnected the ground and everything else on it.

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  • audio20
    audio20 May 11, 2010

    The Minimum Bridged Load for this amp is 4 Ohms.
    Are your 2 10's Dual voice coil or single?
    You may have the wrong load on the amp causing it to go into protect if you haven't already blown the outputs.



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It could be even simpler than that, yes an improper impedance rating on an amp will cause it to overheat, but should function temporarily until it reaches peak temp. If the outputs were blown the protect light should not light up being that they would need to work to cause the protect light to come on. I would double check all of your connections, one small little crossed wire would cause an amp to immediately go into a protect mode.

Posted on May 30, 2009


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What is the speaker load in Ohms that you are running? Or what exactly is hooked up to it? are you bridging it? The protection light will come on if the load is too much for the amp to handel. If the load (in Ohms) is less than the rated load that it can run, it will stop the output to keep the amp from self destructing. The amp will sense that the demand for power will be too high for the amps circuitry which will either make the amp get so hot that it will burn up the copper on the board or more likely burn up the power mosfetts that power the speakers. If the Ohms are within range then it will allow power to flow through the circuit until the rails that the mosfetts are bound to until they get so hot that it will go into thermal protection. So if your amp has both thermal and overload protection lights and the overload is light then the load is probably too much for the amp. if it's bridged in mono the you can only have 1 speaker setup hooked up it if it's a 2 channel amp. a 4 channel amp bridged in mono for both front and rear channels will be able to have 2 speakers rated a 4 ohms each hooked up to the amp 1 set per bridged output or channel.
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