m1-cp750PrincipalDolby Digital Cinema Sound Processor CP750

The Dolby Digital Cinema Sound Processor CP750 provides easy-to-operate audio control in digital cinema environments. It supports innovative Dolby Surround 7.1 premium surround sound and integrates seamlessly with existing technologies.

Versatile Audio Processing for Digital Cinema

Designed specifically for digital cinemas, the Dolby® Digital Cinema Sound Processor CP750 delivers the best in surround sound from all content sources. In addition to the digital cinema formats (Dolby Surround 7.1 and 5.1 digital PCM), it also decodes Dolby Digital Surround EX™ (bitstream), Dolby Pro Logic® II, and Dolby Pro Logic.

Integrates with Dolby Show Manager Software

Integration with Dolby Show Manager software gives you a drag-and-drop interface so that you can easily build volume cues and digital input selection into a show. You also get real-time volume control from any Dolby Show Manager client and seamless processing of ASCII commands from third-party controllers.

Controlled from Anywhere

The Dolby CP750 is ready for the network operations center (NOC) and can be monitored and controlled anywhere on the network for status and function. Hearing-impaired (HI) and auxiliary analog outputs complement the CP750’s main eight-channel audio output.


Eight-Channel Digital Input (4 × AES/EBU) for Digital Cinema Server

Includes support for Dolby Surround 7.1
Provides access to hearing-impaired (HI) and visually impaired-narrative (VI-N) tracks when provided on 7/8

Two Digital Pair Inputs (1 × AES/EBU each)

Connects alternative content sources (for example, preshow server or satellite receiver)

Toslink Digital Input

Connects alternative content sources that output optical digital audio

Eight-Channel Analog Input

Connects an existing film sound processor for hybrid installations or retrofits

USB Connector

Allows easy setup of your system from a PC

Ethernet Connector

For connection with the Dolby Show Manager network; allows monitoring, control, or upgrades anywhere on the network for glitch-free shows

  • Other Inputs/Outputs

    Ethernet Connector

    • RJ-45 for network connection and PC setup software

    Automation Connector

    • 25-pin female D-connector, floating ground

    RS-232 Serial Port

    • 9-pin female D-connector

    Remote Connector

    • RJ-45 connector for use with optional Remote Fader CAT868 (not an Ethernet connection)

    Backup Power Port

    • 4-pin female XLR connector for use with optional External Power Supply CAT994

    AC Input

    • Simple unswitched IEC power inlet module

    USB Port

    • For connection to PC to run setup software

    Audio Processing


    • 44.1, 48, and 96 kHz; 16-, 20-, and 24-bit

    Dolby Digital (AC-3)

    • Up to 5.1 channels

    Dolby Pro Logic

    • L, C, R, and S (SW configurable)

    Dolby Pro Logic II

    • L, C, R, Ls, and Rs (SW configurable)

    Dolby Digital Surround EX

    • L, C, R, Ls, Rs, Bsl, Bsr, and SW


    • L, R, and S (SW configurable)

    Other Parameters

    Global Audio Delay

    • All input sources separately adjustable from 0–250 ms

    Surround Delay

    • Digital surround delay: 0–150 ms; Dolby Pro Logic surround delay: 0–150 ms


    • Eight-channel 1/3-octave plus parametric for SW

    Dynamic Range

    • Typically 105 dB clip to CCIR/ARM weighted without noise optimizer enabled, up to 10 dB more with optimizer enabled


    • Typically 0.005% from eight-channel analog input to main output

    Optional Accessories

    • External Power Supply CAT994
    • Remote Fader CAT868
    • CP750-CK Connector Kit
    • CP750 Installation Manual (Dolby Part Number 9110270)

    Power Requirements

    • 100–240 VAC, 50–60 Hz

    Dimensions and Weight

    • 2-U rackmount chassis
    • 89 × 432 mm (3.5 × 17 inches)
    • Overall depth, including connectors and fader knob: 269 mm (10.6 inches)
    • Depth behind rack ears, including connectors: 248 mm (9.75 inches)
    • Depth in front of rack ear mounting surface: 24 mm (0.94 inches)
    • Net: 4.2 kg (9.4 lb)

    Environmental Conditions

    • Operating: 0°C–40°C (32°F–104°F)
    • Humidity: 20%–80% relative humidity (noncondensing)

    Regulatory Notices

    • North America: This unit complies with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules, and Industry Canada ICES-003 specifications. It is UL Listed for the US and Canada.
    • Europe: This unit complies with the requirements of Low Voltage Directive 2006/95/EC and EMC Directive 2004/108/EC and carries the CE marking accordingly.

    Dolby CP750 Front Panel Specifications

    Digital 1 Input

    • 4 × AES 25-pin female D-connector provides four AES/EBU channel pair inputs
    • Input impedance: 110Ω balanced

    Digital 2, 3 Inputs

    • 1 × AES male BNC connectors, unbalanced but floating, per AES-3id-1995/SMPTE 276M
    • Input impedance: 75Ω

    Digital Input

    • Digital Toslink connector

    Multichannel Analog Input

    • Eight-channel 25-pin female D-connector, balanced analog, 10K differential input impedance
    • Reference level: 300 mV

    Nonsync Input

    • Two-channel RCA connector, 21K input impedance, adjustable input level

    Microphone Input

    • XLR connector, standard pinout, 10K differential input impedance, 12 V phantom power available, adjustable gain

    Dolby CP750 Rear Panel Specifications

    Main Audio Output

    • Eight-channel 25-pin male D-connector, balanced floating analog, 100Ω differential output impedance
    • Do not load with less than 600Ω differential

    Auxiliary Output

    • Two-channel, unbalanced analog, 100Ω output impedance, RCA connectors
    • Reference level: 200 mV
    • Always routes channel pair 7/8 of 4 × AES input for alternate uses such as HI and VI-N transmitters—this fixed-level output has no EQ and is not controlled by the fader

    Hearing-Impaired Output

    • One-channel, unbalanced analog, 100Ω output impedance, RCA connector
    • Center weighted sum of Left, Center, and Right channels
    • Output level: 200 mV


Dolby Atmos Cinema Processor CP850

The CP850 is the complete audio solution for today’s digital cinemas, including new crossover support and it’s now more cost-effective than ever. Contact Dolby Sales for more information.

Dolby CP850 Cinema Benefits

Dolby Atmos® provides a unique approach to cinema audio, giving filmmakers unprecedented power and freedom to realize their creative visions. In your cinema, Dolby Atmos gives audiences a natural and enveloping sound experience that fully reflects the original artistic intent.

Benefits include:

  • Plays up to 64 audio channels for an unmatched audience experience
  • Sophisticated EQ processing optimizes playback for all content types, even in acoustically challenging environments
  • Flexible configurations provide all the common I/O interfaces for the modern digital cinema
  • Automated calibration ensures consistent, high-quality playback for each movie

Dolby Commissioning Service

Each Dolby Atmos Cinema Processor CP850 includes the Dolby Commissioning Service: a complimentary review of the speaker configuration design and an initial room equalization. Our Content Services consultants will review your design drawings and equipment selection to ensure that your theatre delivers the highest-quality experience possible.

Dolby Atmos Interface DAC3201

The Dolby Atmos Interface DAC3201 allows you to use legacy amplifiers in Dolby Atmos installations. The DAC3201 employs an audio-over-Ethernet protocol, to receive the digital audio stream from the CP850. It then converts the digital audio to analog audio for connection to amplifiers. Each DAC3201 supports up to 32 analog outputs.

A Dolby® CP850 cinema processor together with a single DAC3201 can support up to 48 output channels. Installations with more than 48 output channels will need two DAC3201 units.


Dolby CP850 Technical Features

  •  Dolby Atmos, Dolby Surround 7.1 and 5.1 playback

  •  Dolby codec support for alternative content (Dolby TrueHD, Dolby Digital Plus™, Dolby Digital, and Dolby E upmixing of non-DCP content)

  •  16 channels of DCI PCM audio input

  •  Support for 64 speaker feeds, configurable between 16 analog outputs and a Dolby Atmos Connect (DAC) output

  •  Flexible I/O for a wide variety of content sources (16-channel AES, S/PDIF, optical, stereo analog, public announcement microphone)

  •  Dolby Show Manager integration and web services APIs to easily integrate with TMS and NOC systems

  •  Simplified installation, maintenance, and day-to-day operation of cinema sound systems for exhibitors

  •  Sophisticated EQ processing to improve cinema audio playback


  • Dolby CP850 Specifications



    1 × DB25

    8 × AES (16-channel) input

    2 × BNC

    Two AES-3id inputs

    1 × Toslink®

    One optical digital audio input

    1 × RCA

    S/PDIF input

    2 × HDMI®

    Two HDMI inputs that can be routed to the HDMI output

    1 × HDMI

    One HDMI pass-through output

    RCA stereo

    Non-sync input

    2 × XLR

    Two microphone inputs for alignment and PA

    1 × GigE

    Command interface for theatre network and web UI traffic

    1 × GigE

    Dolby Atmos data input

    2 × GigE

    Dolby Atmos Connect interface

    1 × DB9

    Standard 9-pin serial port

    2 × DB25

    16-channel electronically balanced analog outputs

    2 × RCA

    HI and VI-N (hearing-impaired and visually impaired narrative) outputs

    1 × DB25

    Contact closure automation; eight assignable macros, mute, and a three-wire volume control

    1 × IEC 60320

    Power cable connector

    1 × RCA

    Booth monitor output

    1 × BNC

    DCI channels 13 and 14 pass-through for ancillary theatre system syncing

  • Dolby CP850 Front Panel


    A feature-rich, web-based interface makes configuration easy. Program macros ensure correct playback of a variety of source materials and allow remote monitoring of the CP850’s functional health.

    • CP850 Front Panel Controls

      Master fader
      Mute button
      Power button
      Eight macro buttons
      LCD display with navigational buttons

    Dolby CP850 Rear Panel




    A complete set of inputs and outputs offers comprehensive connection capabilities for any theatre or configuration. For a complete list, see the Specifications tab.

  • DolbyAtomos850