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The Bose Professional commercial sound processor simplifies quick-turn installations requiring music and microphone reinforcement with intelligent controls. AutoVolume adjusts sound levels in real time, adapting to changing ambient noise, while SmartBass ensures balanced bass that enhances any environment. With the time scheduler, you can automate source and level changes throughout the day, eliminating the need for manual adjustments. The network-based architecture allows for easy setup and real-time management via a browser interface or offline configuration utility. CSP supports up to five listening areas, managed by optional digital controllers or the ControlSpace Remote app, and features upgraded mixing functionality to blend multiple input sources, perfect for live microphone reinforcement. In conclusion, the Bose Professional sound processor is a versatile, efficient solution for high-quality sound reinforcement with user-friendly, network-based control.
FEATURES
Ensure optimal sound levels with AutoVolume, which adjusts in real-time to ambient noise, keeping music at the ideal level when paired with AVM-1 sense microphones (sold separately). Upgrade to the CSP-1248 processor to support up to five AVM-1 units, or choose the CSP- 428 processor for up to two units.
Deliver the perfect bass level—noticeable yet never overpowering. SmartBass delivers balanced bass, adapting to room acoustics and ear sensitivity for rich, nonoverpowering sound, even at low volumes.
Struggle no more with uneven audio levels between different sources. Opti-Source Level Management, which adjusts the input of up to four sources for uniform volume. Opti-Voice ensures smooth transitions between music and
announcements.
Take advantage of full mixing functionality, allowing input sources to be mixed and assigned to each listening area.
Zone the sound system to tailor audio for each area, creating up to five distinct listening zones. Control each with optional wall-mounted ControlCenter controllers or the ControlSpace Remote app.
Use the CSP Configuration Utility appto pre-configure devices, and export settings.
Right-sized connectivity for for cost-effective commercial installation — 8 x 4 balanced analog I/O, 4 pair mono-summed RCA inputs, 8 control inputs, 1 control output, mute contact, Ethernet port, and Bose AmpLink connectivity.
Bose Professional AmpLink output for simplified digital audio connection to compatible power amplifiers, reducing terminations, and related points of failure.
Simplify wiring with a network-based architecture, using Cat-5 or Cat-6 wiring and PoE capabilities. Supports both DHCP and static IP schemes for flexibility and scalability.
Applications
Designed for a wide range of applications, including:
Retail
Restaurants
Bars & Pubs
Hospitality
Fitness
Offices
Mechanical Diagrams

| Feature | Description |
|---|---|
| Channel Separation | < -105 dB at +4 dBu, 1 kHz |
| Dynamic Range | > 115 dB, A-weighted, 20 Hz – 20 kHz |
| Frequency Response | 20 Hz – 20 kHz (+0.3/-0.5 dB) |
| THD+N | < 0.01% at +4 dBu |
| AEC-Enabled | No |
| Analog Inputs | 12 (4 unbalanced summed-mono + 8 balanced mic/line) |
| Analog Input Connectors | (4) RCA stereo, (7) 3-pin Euroblock, (1) 4-pin Euroblock |
| Equivalent Input Noise | < -119 dBu at 64 dB gain |
| Sensitivity Options | -70, -60, -50, 0, +4 dBu, -10 dBV |
| Input Impedance | 12 kΩ at 1 kHz |
| Max Input Level | +24 dBu at 0 dB gain |
| Phantom Power | 48 V, selectable per input |
| Digital Channels | 8 AmpLink out |
| Digital Connectors | (1) RJ-45 AmpLink out |
| Analog Outputs | 4 balanced line |
| Analog Output Connectors | (4) 3-pin Euroblock |
| Max Output Level | +24 dBu |
| Output Impedance | 66 Ω |
| Control Inputs | (8) digital, 9-pin Euroblock / (1) digital, 2-pin Euroblock (mute) |
| Digital Input Voltage | 0–3.3 V (1.6 V threshold) |
| Control Outputs | (1) digital, 2-pin Euroblock |
| Output Current | 10 mA source, 100 mA sink |
| Output Voltage | High: 8 V / Low: < 1 V at 100 mA |
| Mains Connector | IEC 60320-C14 inlet |
| Mains Voltage | 85–264 VAC, 50/60 Hz |
| AC Power Consumption | < 30 W typical |
| Power Dissipation | 22 W (75 BTU/hr) |
| Computer Interface | RJ-45 Ethernet (10/100 Mbps) |
| LED Indicators | Power/status, I/O signal, Ethernet, AmpLink |
| DSP-Enabled | Yes |
| Converters | 48 kHz / 24-bit A/D and D/A |
| Latency | 900 μs analog in to out |
| Color | Black |
| Cooling | Active, side-venting with fan |
| Mounting | Rack-mount, 1RU |
| Operating Temp | 0 °C to 40 °C (32 °F to 104 °F) |
| Dimensions (H×W×D) | 1.7 × 19.0 × 8.5 in (44 × 483 × 215 mm) |
| Storage Temp | -40 °C to 70 °C |
| Product Codes | 808456-1110: CSP-1248 120V US 808456-2110: CSP-1248 230V EU 808456-3110: CSP-1248 100V JP 808456-4110: CSP-1248 230V UK 808456-5110: CSP-1248 240V AU |
| Warranty | 5 years |
| Included in Packaging | (1) 3-pin Euroblock connector (11) cable ties (1) CSP-1248 unit (1) 4-pin Euroblock connector (1) AC power cord (2) 2-pin Euroblock connectors (5) 6-pin Euroblock connectors (1) 9-pin Euroblock connector (1) installation guide |
| Description | Downloads |
|---|---|
| BOSE CSP-1248 Commercial Sound Processor | 808456-2110 DataSheet | Downloads |
| BOSE CSP-1248 Commercial Sound Processor | 808456-2110 Installation Guide | Downloads |
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