ASP (Automatic Speaker Presence) is required when the AP8.9 bit amp is installed and designed to solve problems associated with signal interference or deactivation of OEM amplifiers when there is no speaker load.
The MPCX 2 TM.3 car audio crossover is specifically developed for MP 70.3 and MP 25.3 when installed in a 3-way multi-amplification system and combined with an MP 165.3/ MP 165P.3 woofer actively driven.
This Plug&Play harness provides the ability to replace the OEM BMW amplifier with an Audison AP bit on BMW vehicles equipped with the optional “Hi-Fi” sound system.