There is nothing worse in car audio world than the magic blue smoke caused by voltage drop. It is real critical & at the same time; very very necessary to monitor your vehicles voltage to prevent damage to all your car audio equipment. Installing a separate voltmeter, separate power switch and a separate bass knob can prevent all those which can be of great hassle.
Combining those three issues, CT Sounds represents the solution with its Universal Bass Knob with Digital Voltmeter (Pushable ON/OFF for Amp). This patent-pending technology offers remote gain control, a rotary pushable on-off switch and a digital volt meter display.