Description

Bose ControlSpace CSP-428 Processor

Transform your commercial audio system with the intelligent and highly efficient Bose ControlSpace CSP-428 Processor, a powerful DSP solution designed to simplify installation while delivering exceptional sound control. Developed by Bose Professional, a globally trusted name in professional audio, the CSP-428 is engineered to meet the evolving demands of modern business environments.

The Bose ControlSpace CSP-428 Processor is ideal for retail stores, restaurants, hospitality venues, fitness centers, and corporate spaces where high-quality audio and easy system management are essential. Combining advanced digital signal processing with intuitive configuration, it allows users to create professional-grade audio systems without the complexity traditionally associated with DSP programming.

One of the standout features of the Bose ControlSpace CSP-428 Processor is its smart, application-based configuration. Unlike traditional DSPs that require extensive programming knowledge, the Bose ControlSpace CSP-428 Processor uses a guided setup approach. This allows installers and integrators to configure the system quickly and efficiently using predefined workflows. As a result, installation time is significantly reduced, making it a cost-effective solution for projects of all sizes.

The Bose ControlSpace CSP-428 Processor offers 4 analog inputs and 8 outputs, providing flexible connectivity for a wide range of audio sources and destinations. Whether you are connecting microphones, music players, or paging systems, the CSP-428 ensures seamless integration and optimal signal routing. This flexibility makes it suitable for both single-zone and multi-zone audio applications.

Another key advantage is its advanced signal processing capabilities. The Bose ControlSpace CSP-428 Processor includes essential DSP functions such as equalization, dynamics processing, mixing, routing, and delay. These features allow precise control over audio performance, ensuring clear speech intelligibility and balanced music playback throughout the space. Whether it’s background music in a retail environment or announcements in a corporate office, the processor delivers consistent and high-quality sound.

The Bose ControlSpace CSP-428 Processor also supports Bose AmpLink connectivity, enabling direct digital audio connection to compatible Bose amplifiers. This reduces the need for multiple analog cables, simplifies wiring, and preserves audio quality by minimizing signal loss. It is an excellent choice for integrators looking to streamline system design and improve reliability.

User control is another area where the Bose ControlSpace CSP-428 Processor excels. It is compatible with optional wall controllers, allowing end users to easily adjust volume levels, select sources, and manage zones without needing technical expertise. This makes it particularly suitable for environments where staff need simple and intuitive control over the audio system.

The processor’s compact design ensures easy installation in racks or cabinets, while its robust construction guarantees long-term reliability. It is built to withstand the demands of commercial environments, ensuring consistent performance over time.

Energy efficiency is also a key consideration in the Bose ControlSpace CSP-428 Processor design. The processor operates with low power consumption, making it an environmentally friendly choice for modern installations. Combined with its durability and reliability, this ensures a low total cost of ownership.

In summary, the Bose ControlSpace CSP-428 Processor is a versatile, user-friendly, and powerful DSP solution for commercial audio systems. With its guided setup, flexible connectivity, advanced processing features, and seamless integration with Bose amplifiers, it provides everything needed to create high-quality, reliable audio installations. Whether you are upgrading an existing system or designing a new one, the CSP-428 offers the perfect balance of performance, simplicity, and innovation.

Explore our full range of Digital Signal Processor 

Features

  • Right-sized connectivity for 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 with 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 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 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 on supported Bose loudspeakers
  • Bose 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 (sold separately) digital zone controllers and ControlSpace Remote app provide easy volume control and source selection

Specifications

CategorySpecification
Product TypeBose ControlSpace CSP-428 Audio Signal Processor

Integrated DSP

ParameterSpecification
Signal Processor / CPU32-bit fixed/floating-point DSP + ARM, 456 MHz
Maximum Calculation Power3.6 GIPS / 2.7 GFLOPS
Audio Latency900 μs (analog in to analog out)
A/D & D/A Converters24-bit
Sample Rate48 kHz

Audio Performance

ParameterSpecification
Frequency Response20 Hz – 20 kHz (+0.3 dB / -0.5 dB)
THD+N< 0.01% @ +4 dBu (A-weighted, 20 Hz – 20 kHz)
Channel Separation (Crosstalk)< -105 dB @ 1 kHz
Dynamic Range> 115 dB (A-weighted, 20 Hz – 20 kHz)

Audio Inputs

ParameterSpecification
Input Channels4 (2 unbalanced, 2 balanced)
Input 1 & 2RCA (unbalanced, mono-summed)
Input 33-pin Euroblock (balanced mic/line)
Input 44-pin Euroblock (balanced mic/line or 600Ω paging input with GPI)
Sensitivity Options-10 dBV; -70 / -60 / -50 / 0 / +4 dBu (configurable)
Input Impedance12 kΩ @ 1 kHz
Maximum Input Level+24 dBu
Equivalent Input Noise< -119 dBu
Phantom Power+48 V (selectable per input, 10 mA per channel, 80 mA max total)

Audio Outputs

ParameterSpecification
Output Channels10 (2 analog + 8 digital via AmpLink)
Analog Outputs2 × 3-pin Euroblock (balanced line level)
MOH OutputConfigurable for 600 Ω telephone systems
Digital OutputsRJ-45 (AmpLink, 8-channel, 48 kHz)
Output Impedance66 Ω
Maximum Output Level+24 dBu

Control Inputs

ParameterSpecification
Control Inputs8 digital inputs (9-pin connector)
Mute Input1 digital input (2-pin connector)
Input Voltage Range0 – 3.3 V (threshold 1.6 V)

Control Outputs

ParameterSpecification
Control Outputs1 digital output (2-pin connector)
Output VoltageHigh: 8 V (open circuit), 2.5 V @ 10 mA Low: < 1 V @ 100 mA
Output Current10 mA source / 100 mA sink

Indicators & Controls

ParameterSpecification
LED IndicatorsPower/Status, Signal, Ethernet, AmpLink
Signal IndicationGreen (-60 to -20 dBFS), Yellow (-20 to -2 dBFS), Red (clip)

Electrical Specifications

ParameterSpecification
Mains Voltage85 – 264 VAC, 50/60 Hz
Power Consumption< 30 W typical, < 45 W max
Mains ConnectorIEC 60320-C14
Power Dissipation~22 W

Physical Specifications

ParameterSpecification
Dimensions (H × W × D)44 × 483 × 215 mm (1.7 × 19 × 8.5 in)
Operating Temperature0°C to 40°C
Storage Temperature-40°C to 70°C
Humidity80% (non-condensing)
Cooling SystemActive cooling with side ventilation fan

General & Network

ParameterSpecification
Configuration SoftwareWeb browser-based utility
Network ControlEthernet (RJ-45), 10/100 Mbps

T3S5M0E5/50-KMN

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