Bose PowerShare PS404D Amplifier

The Bose PowerShare PS404D is a 400W, 4-channel amplifier built for flexible commercial sound installations. Its patented PowerShare technology distributes total power asymmetrically across all outputs, so channels can draw more or less power based on actual demand rather than being limited to a fixed per-channel wattage. Load-independent outputs let integrators configure any channel for low-impedance 4/8-ohm speakers or high-impedance 70V/100V distributed systems without bridging or using jumpers. With auto-standby mode for energy efficiency, the PS404D is a versatile choice for mixed-load installations across offices, retail spaces, and multi-zone commercial environments.