Bose CSP-428 Commercial Sound Processor

The Bose CSP‑428 is a rack-mount commercial audio processor designed for advanced control and signal management in multi‑zone audio systems. It supports Ethernet configuration, paging, source leveling, and SmartBass processing to enhance system performance.

This unit handles up to six channels, with features like AutoVolume for ambient-level compensation, Opti‑voice for seamless music/voice blending, and AmpLink digital output to simplify connectivity to amplifiers. It integrates with Bose’s ControlSpace and ControlCenter for efficient zone control.

Ideal for installations in retail, hospitality, corporate, houses of worship, or public spaces, the CSP‑428 offers reliable signal routing, DSP optimization, and integration flexibility for modern commercial audio systems.

Key Features

• 6‑Channel Processing: Manage audio across multiple zones
• Ethernet Configuration: Rear-panel Ethernet port for PC/Mac setup
• AutoVolume Compensation: Adjusts zone output based on ambient noise
• Opti‑Voice Paging: Smooth transition between music and announcements
• Opti‑Source Level Management: Maintains consistent levels when switching sources
• SmartBass Processing: Extends bass performance at any listening level
• AmpLink Digital Output: Reduces wiring complexity to compatible amplifiers

Technical Specifications

• Channels: 6
• Height (Rack Units): 1.7 in (1U)
• Width: 19 in
• Depth: 8.5 in
• Operating Temperature Range: 32 – 104 °F
• Mount Type: Rack-mounted
• Warranty: 5 years limited
• Country of Origin: China
• Power Source: AC

What’s in the Box

• 1x CSP‑428 Commercial Sound Processor
• Rack ears / mounting hardware
• Documentation including installation, user manual, and quick start guide