(NEW) Quest PB-4120D 4x120W Power Amp 70V 4-8 Ohms

The Quest Commercial PB-4120D is a high-performance 4-channel Class-D power amplifier engineered for distributed sound reinforcement in commercial, educational, and institutional environments. Generating up to 120 watts RMS per channel, this 2U rack-mount unit provides high power density and energy efficiency. Its versatile channel architecture allows installers to configure each output independently for either constant-voltage 70V/100V speaker lines or low-impedance 4-ohm/8-ohm loads, making it an ideal solution for complex multi-zone installations.

Built for maximum operational reliability, the PB-4120D features transformerless Class-D design backed by forced-air temperature-controlled cooling. Integrated protection circuitry safeguards the system against short circuits, thermal overload, and DC faults. With rear-panel attenuators, high-pass filter switches, and Phoenix terminal connections, the amplifier provides smooth setup and dependable, continuous performance in high-demand audio distribution systems.