Kicker KEYLOC® Smart Line-Out ConverterThis revolutionary, DSP (digital signal processor) controlled, line output converter automatically detects the frequency response and phase of your factory stereo system, and then allows you to integrate into a more fun, modern entertainment setup! SIGNAL RESTORATION In the pursuit to get the best sound possible from your stereo system that features both factory and aftermarket gear, KEYLOCs patent pending KEY algorithm automatically detects and