Question about Pyramid PB1500 Car Audio Amplifier

2 Answers

PB1500 no diag. lights - Power - OK

I have a PB1500, now owned for about 6 months.. today i noticed the power LED was off on the remote and thus no sound.. i figured it was just a fuse.. No diagnostic lights are on (power/protect) but i know it has power cause the blue LEDs on the side light up.. any suggestions??

P.S. Both my fuses check out as good.. i am lost

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  • DJDubb Dec 24, 2007

    yea after posting i uninstalled, the sub and tested the amp in my office with a 12 power supply.. worked fine so i double checked the lines in my car and suddenly, i only got 1 volt from the main 4 gauge line.. hmm, all fuses looked good but further testing revealed the fuse under the hood as the culprit of all my un-neccesary work..

    Thanks for the help!!

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2 Answers

Check if the terminals are well connected and also check the sub the pyramid can't handle 2 ohm bridged it must be 4 ohms by the way i but the 2600watts and its not even close that power...

Posted on Mar 13, 2008

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I don't know how you checked the fuses but if you didn't use an ohm meter, you need to confirm that you have B+ and remote at the amplifier.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

If the voltage is sufficient at the remote and B+ terminals, the switching power supply has probably failed in the amplifier.

Posted on Dec 21, 2007

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