My specs

MTX TA 3404 Amp
http://www.onlinecarstereo.com/CarAu...roductID=15174

Polk Componets up front
Infinity References in the back.

At first my alternator started to whine(sounded like a spaceship was taking off)

The shop replaced the alternator with a upgraded alt 90 watts? instead of 80(also replaced all the belts including the timing belt)

The stereo is still cutting in and out, they suggested I get a Capacitor, but with only one small amp, I dont see why I would need one. HELP PLEASE!!!