Okay, so i have had two Audiopipe amps, i had an APSM-1300 for about 2 months, and i just bought an APSM-1500! I love both of them! I know they might be dirty power and everything, but i am a 15 year old kid, so I really don't have that much money to spend on top of the line stuff! I have had a problem of the amp cutting out at volume 15. After that, the subs get quiet, and the speakers stay the same. The subs do get louder after 15, but when i get the subs to pound again, the speakers and tweeters start to distort. I am thinking it might be the ground for the amp? I'm not sure, i have been messing with my head unit settings, and nothing has seemed to work. I have $1000 invested into my project and Its pissing me off that my stuff wont perform the way i want it to! So I am really hoping it may just be the ground! But any help is appreciated! THANKS!