Bose ControlSpace ESP4120 Engineered Sound Processor UK

Bose ControlSpace ESP4120

Recommendation to auditoriums, houses of worship, resorts and hospitality venues, retail stores, schools and universities and multi-purpose spaces

Bose ControlSpace ESP4120 Engineered Sound Processor 

The Bose® ControlSpace® ESP-4120 engineered sound processor is an open-architecture DSP with 4x12 fixed analog audio, built-in 8-channel ESPLink output and a rearpanel digital expansion slot offering IP-based network audio and control card options. This model meets today’s strict requirements for high-quality signal processing and control in a cost-effective package. The ESP-4120 is designed for a wide variety of applications ranging from small self-contained projects to larger networked applications.



• High-quality analog circuitry offers both mic and line-level I/ O, operates with ultra-low noise and 115 dB dynamic range 

• Advanced digital signal processing supports audio at 48 kHz sample rate/24-bit, uses a floating-point open architecture DSP and operates at low latencies for sound system precision 

• Expansion card slot supports the use of accessory networking cards, allowing digital audio to be sent and/or received from other compatible products 

• Optional Dante™ media networking card allows single rackspace ESP products to closely integrate with Bose or other manufacturers’ products and systems 

• Bose® ControlSpace® Designer™ software enables a large set of signal processing modules, such as automatic mic mixing, multiband graphic and parametric EQs, Bose loudspeaker libraries, signal generators, routers, mixers, AGCs, duckers, gates, compressors, source selectors and delays 

• Front panel RJ-45 Ethernet connection enables localized configuration and monitoring, while enabling network passthrough when using a rear-panel network option card 

• Built-in Bose ESPLink output sends up to 8 channels of uncompressed digital audio to ESPLink-equipped Bose PowerMatch® amplifiers 

• A variety of control options – ControlSpace ESP products are compatible with the programmable Bose CC-64 and CC-16 controllers and three simplified zone volume interfaces, as well as potentiometers and switches built by other manufacturers 

• Integration with industry-standard control systems using a comprehensive serial protocol through onboard RS-232 and Ethernet ports



Integrated DSP

Signal Processor

32-bit fixed/floating-point DSP + ARM, 456 MHz

Maximum Calculation

3.6 GIPS / 2.7 GFLOPS


43 s

Audio Latency

860 μs (analog in to analog out)

A/D and D/A Converters


Sample Rate

48 kHz

Audio Performance Specifications

Frequency Response

20 Hz - 20 kHz (+0.3 dB/-0.1 dB)


0.002 % at +4 dBu (A-weighted/20 Hz – 20 kHz)

Channel Separation (Crosstalk)

< -105 dB at +4 dBu input and output level, 1 kHz

Dynamic Range

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

Audio Inputs

Input Channels

12 analog (balanced, mic/line level), 16 digital (via option card)

Connectors, Input

3.81 mm Phoenix Contact®, 6-pin

Input Impedance

12 kΩ @ 1 kHz (with or without phantom power active)

Maximum Input Level

+24 dBu

Equivalent Input Noise

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

Phantom Power

+48 VDC, 10 mA, selectable per input

Gain settings

0/14/24/32/44/54/64 dB

Audio Outputs

Output Channels

4 analog (balanced, line level), 8 ESPLink, 16 digital (via optional card)

Connectors, Output

3.81 mm Phoenix Contact®, 6-pin (analog), EIAJ optical (ESPLink)

Output Impedance

66 Ω

Maximum Output Level

+24 dBu

Control Inputs

Inputs (Control)

5 analog or digital inputs, 2 kΩ internal pull-up resistor to 5 V, 3.81 mm Phoenix Contact®, 6-pin

Analog Input Voltage Range

0 V to 3.3 V (maximum 5 V)

Digital Input Voltage Range

0 V to 3.3 V (threshold voltage = 1.6 V)

Control Outputs

Outputs (Control)

5 digital outputs, 3.81 mm Phoenix Contact®, 6-pin

Output Voltage

High: 8 V (open circuit), 2.5 V @ 10 mA;Low: < 1 V @ 100 mA, push-pull

Output Current

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

Indicators and Controls

LED Status Indicators

Power/Status, Signal, Ethernet, Serial (RS-232 + CC-16)

Audio Signal Indication

Green (-60 to -20 dBFS), Yellow (-20 to -2 dBFS), Red (-2 to 0 dBFS)

Electrical Specifications

Mains Voltage

85 VAC-264 VAC 50/60 Hz

AC Power Consumption

< 37 VA typical, over all mains voltages

Mains Connector

IEC 60320-C14 (Inlet)

Power Dissipation

22 W (75 BTU/hr, 19 kcal/hr)



1.7" H x 19.0" W x 8.5" D (44 mm x 483 mm x 215 mm) 

Net Weight

5.8 lb (2.6 kg) 

Operating Temperature

32ºF - 104ºF (0ºC - 40ºC)

Cooling System

Active, side venting


PC Configuration Software

ControlSpace® Designer™ software

Network Control

Ethernet (RJ-45),100Mb

Communications Ports

RS-232 (DB9M, DTE), Bose CC-16 (3.81 mm Phoenix Contact®, 3-pin)

Expansion Slots

1 control/audio network

Audio Channel Capacity

56 (12x4 analog, 8 ESPLink out, 16x16 digital with expansion card)

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