When i turned on my stereo a horrible "bleeeer"ing noise came from my speakers and subs. I turned down my gain on my speaker amp and the noise stopped altogether, but as soon as i turn it up a bit my protect light flashes and the noise starts again from my speakers and sub. I don't understand why my sub does it as that has nothing to do with my speaker amp accept my rca's go into my sub then into my speaker amp. I disconnected the rca's from my sub to speaker amp and my sub is fine and i connected my rca's from my headunit straight to my amp and it still happens. If i leave my rca's and speaker wires disconnected it still does it (protect light flashes). And when i turn down the gain a bit it seems fine but only my left speaker works, if i turn the balance to either left or right my left speaker plays louder and my right still does not play at all. I swapped the 2 speaker wires around and it seems fine balance wise accept there the other way round obviously but as soon as i turn the gain up they start making a high pitched noise (after i swapped the speaker wires around).