Another small item that JL had to fit into their amplifiers for the high level connection. It works as advertised. Use it on a JL RD500.1 in a Buick Regal with a Harman Kardon system. Plugs into rear passenger door via quick couplers for full signal. Initially I used Scosche LOC but the bass sounded weak and lacking power. As soon as I changed it, the bass became fuller and cleaner.
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