The Focal Inside IW IMP 2.2 car radio adapter cable is designed for the IMPULSE 4.320 four-channel digital amplifier. Without modifying the original wiring, it allows easy connection of the amplifier to two front channels and two ISUB TWIN subwoofers (two bridged channels). Designed for all types of vehicle, this one-meter-long cable makes Plug & Play installation quick and easy. Connection to the extension cable is via ISO connectors; no soldering is required.