The Top HiFi (Option 688) Add-an-Amp harness kit for RAM + Booster modules is designed to add a 9-ch aftermarket amp/DSP to the RAM and Booster modules to power all OEM speakers. The harnesses install in between the RAM (7ch – components) and the Booster respectively (2ch – woofers), keeping all OEM iDrive features intact while splitting the inputs and outputs to interface with aftermarket amp/DSP.
The warranty of the harness kit is one year from the purchase date. Harness kit is designed for experienced DIYers. Professional install suggested. Support limited to harness install; no support given to aftermarket parts not sold with harness kit.