APBMW BIAMP 2 Plug & Play T-harness provides the ability to:1. Take the front speaker output signal from the OEM head unit through the under-seat woofer connector and route it to the AP bit amplifier input.2. Separately route the signal from the AP bit amplifier outputs to the front midrange housed in the car door and to the sub underneath the seat, without the need to cut the OEM cables.The APBMW BIAMP 2 is compatible only with BMW and MINI vehicles that are not provided with an OEM amplifier. The package contains a pair of cables, for left and right channels. The cables are 450 cm long to reach the vehicle boot, where the Audison Prima AP bit amplifier is installed.