Amplifier Integration Interface

The PAC AmpPRO AP4-GM61 is an amplifier integration interface engineered to streamline the installation of aftermarket amplifiers in select GM vehicles featuring factory Bose sound systems. By utilizing a data-bus-controlled design, it provides a full-range, flat audio signal that serves as a solid foundation for high-fidelity sound upgrades, eliminating the need for external summing or audio correction devices. This interface retains all critical factory vehicle features, including OnStar, Bluetooth connectivity, navigation prompts, and safety system warning chimes, while maintaining the original radio's fit and finish. It features variable volume, fade, balance, bass, mid, and treble settings, and provides 5-volt RMS preamp outputs for front, rear, sub, and center channels. The package includes the AmpPRO module, harness, a remote sub-level controller, and an optional TOSLINK optical output for digital signal transfer. Installation is simplified via a plug-and-play design, though a separate APH-GM02 speaker connection harness is available for an even faster, more efficient setup.