older rf class d amps made that noise also. iv have heard on themis he talking about the noise coming from the amp or from the sub??? the higher i turn the gain up on my 1501d the louder this buzzing sound gets.. which is coming from the inside of the amp. or do all class D amps do this? iunno but when i got my amp for the first time and heard the buzzing sound i thought something was wrong with it. but it works fine and dandy and i am one happy camper. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif My 1000.1bd whistled like a mofo...older rf class d amps made that noise also. iv have heard on them