KICKER - 47KEYLOC - KEY series powered line-out converter
Kicker 47KEYLOC Key Series Smart Powered Line-Out Converter This revolutionary line output converter automatically detects the frequency range of your speaker leads, and a whole lot more! FIND THE FREQUENCY - News flash: factory audio systems don't always deliver a full-range signal on every speaker wire. That makes it tough to hook up an aftermarket amp and get the sound you wanted - until now. Attach the speaker wire to the KEYLOC, play a free test tone (below) and read the LEDs.