I Had My 07 Avy Hooked Up With Some Tower Speakers A Month Ago On A Trade I Did Through Work. Guy Did A Awesome Job. Hooked Me Up With 4 Cans, A Sub Under Wheel, And Two Amps In Cargo Space. Only Problem Is When I Turn Up The Amp I Get Interference From The Engine When I Start It And Under Power. Its Like A Whining Sound In Tower Speakers. When I Turn Amp Down It Goes Away But Is No Where Near Loud Enough On The Wake. Any Help Would Be Greatly Appreciated

You are experiencing RF interference from the alternator. You can try changing the power and ground connections of the offending amp and if that doesn't work then try a noise filter to remedy this issue. Either way this is a very common and annoying problem.