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CSP-428 commercial sound processor

CSP-428

Commercial Sound Processor

Overview

The DSP for quick-turn installations — Bose Professional 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, 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.

Features

  • Right-sized connectivity for cost-effective commercial installation — 2 × 2 balanced analog I/O, 2 pair mono-summed RCA inputs, 8 control inputs, 1 control output, mute contact, Ethernet port, and Bose Professional AmpLink connectivity

  • CSP configuration utility with browser-based UI facilitates real-time display and control of levels, routing, thresholds, priorities, scheduled events, Bose Professional loudspeaker EQs, plus input and area EQs

  • Rear-panel Ethernet port for 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 Professional AVM-1 sense microphone (sold separately)

  • Opti-Voice paging provides a smooth transition between music and announcements

  • Opti-Source level management monitors input level of up to 4 sources, maintaining consistent volume when switching sources

  • SmartBass processing expands performance and response at any listening level

  • AmpLink output for 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

Applications

Designed for a wide range of applications, including:

  • Retail stores

  • Restaurants

  • Hospitality venues

SPecs

Technical Specification

AMPLIFICATION
  • Channel Separation (Crosstalk)

  • < -105 dB at +4 dBu, 1 kHz input signal

  • Dynamic Range

  • > 115 dB, A-weighted, 20 Hz – 20 kHz, analog through

  • Frequency Response

  • 20 Hz – 20 kHz (+0.3 dB/-0.5 dB)

  • THD+N

  • < 0.01% at +4 dBu (A-weighted, 20 Hz – 20 kHz)

ACOUSTIC ECHO CANCELATION (AEC)
  • AEC-Enabled

  • No

AUDIO INPUTS, ANALOG
  • Channels

  • 4 (2 unbalanced, summed-mono + 2 balanced, mic/line)

  • Connectors

  • (2) RCA stereo pairs, (1) 3-pin Euroblock, (1) 4-pin Euroblock

  • Equivalent Input Noise

  • < -119 dBu at 64 dB gain (150 Ω input, 22 Hz – 20 kHz)

  • Gain Settings

  • -70 dBu, -60 dBu, -50 dBu, 0 dBu, +4 dBu, -10 dBV, selectable phantom power

  • Input Impedance

  • 12 kΩ at 1 kHz, with or without phantom power

  • Maximum Input Level

  • +24 dBu at 0 dB gain (20 Hz – 20 kHz, THD+N < 0.3%)

  • Phantom Power

  • 48 V, selectable per input, open circuit, 10 mA maximum per channel, 80 mA maximum across all channels

AUDIO INPUTS/OUTPUTS, DIGITAL
  • Channels

  • 8 AmpLink out

  • Connectors

  • (1) RJ-45 AmpLink out

  • Type

  • AmpLink (output)

AUDIO OUTPUTS, ANALOG
  • Channels

  • 2 balanced, line

  • Connectors

  • (2) 3-pin Euroblock

  • Maximum Output Level

  • +24 dBu (22 Hz – 20 kHz, THD+N < 0.3%)

  • Output Impedance

  • 66 Ω

COMPLIANCE
  • EN 54-24 Certified

  • No

CONTROL INPUTS
  • Control Inputs

  • (8) digital, 9-pin Euroblock, 3.81 mm / (1) digital, 2-pin Euroblock, 3.81 mm (mute)

  • Voltage Range, Digital

  • 0 V – 3.3 V (1.6 V threshold)

CONTROL OUTPUTS
  • Control Outputs

  • (1) digital, 2-pin Euroblock, 3.81 mm, detachable

  • Output Current

  • 10 mA source, 100 mA sink (24 VDC maximum external supply voltage)

  • Output Voltage

  • High: 8 V (open circuit), 2.5 V at 10 mA / Low: < 1 V at 100 mA, push-pull

ELECTRICAL
  • Mains Connector

  • IEC 60320-C14 inlet

  • Mains Voltage

  • 85–264 VAC, 50/60 Hz

  • Power Consumption

  • < 30 W typical, over all mains voltages (power supply maximum < 45 W)

  • Power Dissipation

  • 22 W (75 BTU/hr, 19 kcal/hr)

GENERAL
  • Computer Interface Connection

  • RJ-45 (Ethernet, 10/100 Mbps)

INDICATORS AND CONTROLS
  • LED Status Indicators

  • (1) power/status LED, (1) input/output signal LED, (1) Ethernet LED, (1) AmpLink LED

INTEGRATED DSP
  • A/D and D/A Conversion

  • 48 kHz / 24-bit

  • Audio Latency

  • 900 μs, analog input to analog output

  • DSP-Enabled

  • Yes

  • Maximum Calculation

  • 3.6 GIPS / 2.7 GFLOPS

  • Signal Processor/CPU

  • 32-bit fixed/floating-point DSP + Arm 456 MHz processor

  • Sample Rate / Bit Depth

  • 48 kHz / 24-bit

PHYSICAL
  • Colors

  • Black

  • Cooling System

  • Active, side-venting with fan

  • Mounting/Rigging Provisions

  • Standard rack ears

  • Operating Temperature

  • 0 °C to 40 °C (32 °F to 104 °F)

  • Product Dimensions (H×W×D)

  • 1.7 in × 19.0 in × 8.5 in (44 mm × 483 mm × 215 mm)

  • Rack Spaces

  • 1RU

  • Storage Temperature

  • -40 °C to 70 °C (-40 °F to 158 °F)

Mechanical Diagrams

CSP428 CAD bottom
Bottom View
CSP428 CAD back
Rear View
CSP428 CAD side
Side View
CSP428 CAD top
Top View
CSP428 CAD front
Front View
ISO View

Images

  • Betacon CSP 428 right
  • Betacon CSP 428 front
  • Betacon CSP 428 left
  • Betacon Stacked Right Facing
  • Betacon Stacked Front
  • Betacon Stacked Left Facing

Product codes

  • 808453-1110
  • CSP-428, 120V, US
  • 808453-2110
  • CSP-428, 230V, EU
  • 808453-3110
  • CSP-428, 100V, JP
  • 808453-4110
  • CSP-428, 230V, UK
  • 808453-5110
  • CSP-428, 240V, AU

Warranty Period

  • 5 years

Included in Packaging

  • (1) 3-pin Euroblock connector

  • (1) 4-pin Euroblock connector

  • (1) 6-pin Euroblock connector

  • (1) 9-pin Euroblock connector

  • (1) AC power cord

  • (1) CSP-428

  • (1) installation guide

  • (11) cable ties

  • (2) 2-pin Euroblock connectors