SOURCE: 600 watt 2 channel power acoustik sterling amp
On your amp, there should be a switch (on the side probably) that has "LP", "HP", and "FULL" or "OFF". This is a switch for the low pass/high pass filter. Switch it to "LP" as this will allow only low frequencies to go to your subs, what you want. If you don't have that switch, go to an audio store or online audio supplier and get either a low pass filter, band pass filter, or a cross-over, and follow the wiring diagram that comes with it to filter out the high frequencies before they get to your subs.
SOURCE: I have a power acoustik A3000DB 3000W Mono Class D Series Amplier
I HAVE TWO OF THESE AMPLIFIERS MYSELF. IT IS NO DOUBT AN INTERNAL PROBLEM BECAUSE THROUGH THE PROCESS OF ELIMINATION, YOU HAVE DONE ALL THAT YOU CAN DO AND IT POINTS TO THE AMPLIFIER ITSELF. AS FOR THE CAUSE FOR ITS FAILURE, THERE ARE MANY, BUT IT IS MORE THAN LIKELY IN THE INPUT CIRCUITS AS FAULTS IN THE POWER SUPPLY OR OUTPUT SECTION WOULD MORE THAN LIKELY SHOW UP TRIPPING THE PROTECTION CIRCUITRY. IT WILL SIMPLY HAVE TO BE SERVICED. I AM LISTED IN THE REPAIR DIRECTORY OF THIS SITE UNDER THE ZIP-CODE 70360. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE...V
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