Bose CSP-428, Commercial Sound Processor

The Bose CSP-428, Commercial Sound Processor. The DSP for quick-turn installations. Bose commercial sound processors are part of a comprehensive platform that includes loudspeakers, controls, and software that help installers deliver premium sound systems efficiently. An onboard CSP configuration utility and intuitive browser-based UI provide a quick-setup workflow. Common tasks are presented in a logical manner, so you can configure the system faster, reducing installation time while increasing setup accuracy. Once installed, Bose-proprietary algorithms offer predictable performance while optional interfaces such as ControlCenter digital zone controllers and the ControlSpace Remote app make operation easy for end-users.

Right-Sized Connectivity

Cost-effective commercial installation — 2 x 2 balanced analog I/O, 2 pair mono-summed RCA inputs, 8 control inputs, 1 control output, mute contact, Ethernet port, and Bose AmpLink connectivity

CSP Configuration Utility

Browser-based UI facilitates real-time display and control of levels, routing, thresholds, priorities, scheduled events, Bose loudspeaker EQs, plus input and area EQs

Rear-Panel Ethernet Port

PC/Mac configuration; also allows for connection to networks supporting ControlCenter digital zone controllers and the ControlSpace Remote app

AutoVolume Compensation

Continuously adapts zone output level based on ambient noise when paired with the Bose AVM-1 sense microphone (sold separately)

Bose Amplink Output

Simplified digital audio connection to compatible power amplifiers, reducing terminations, and related points of failure

Intuitive End-User Operation

Optional ControlCenter CC-1D, CC-2D, and CC-3D digital zone controllers and ControlSpace Remote app provide easy volume control and source selection

Product Specifications:

Signal Processor/CPU: 32-bit fixed/floating-point DSP + ARM, 456 MHz

Input Channels:

2 analog (balanced, Mic/Line Level/Page-In)

2 analog (unbalanced, RCA Line-in, summed to mono)

Dynamic Range: 115 dB, A-weighted 20 Hz to 20 kHz, analog through, 600 Ω load

Output Channels:

2 analog (balanced, Line Level)

8 digital (AmpLink output)