Hey guys. I'm new to the forum and haven't yet installed my Avic 120BT but have a question. I'm installing a JL Stealthbox, powered by a JL HD900/5 amp. I see that the Avic has a feature to control the subwoofer volume. Has anyone used that feature? I have the option of installing a remote volume control for my amp (to control the sub) but will forego that if the Avic does it well. Any advice?