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RECENTLY AQUIRED AN ORIGINAL DAVE MADE M400 1X4. I HAVE A 13.8V 83 AMP POWER SUPPLY ON IT. JUST METERED IT AND ITS ONLY DOING ABOUT 500 OR SO WATTS. I AM WAITING FOR MY VARIABLE 13.8-15.5 VOLT 100 AMP TO COME IN. MY FIRST QUESTION IS, WILL I SEE GAINS IN WATTAGE WITH THE NEW POWER SUPPLY? 2ND QUESTION, IS THE AUDIO FEEDBACK NORMAL ON THE AMP AS WELL?