Data Sheet

ManualsBrandsStudio Technologies ManualsLive SoundModel Surround Monitoring System

Model 74 Central Controller / Model 75 Control Console

50220-0106, Issue 1

StudioComm for Surround

The StudioComm for Surround Model 74 Central Controller and Model 75

Control Console work together to provide 5.1 surround and stereo source

monitoring capabilities, along with a full-featured headphone “talkback”

cue system. The system is a perfect fit for contemporary facilities that need

to perform a variety of audio tasks. These can include surround and stereo

mixing and monitoring, live recording of voice, music, and sound effects,

and on-air broadcast applications. The system’s features were carefully

selected to provide extensive capabilities while remaining simple to operate.

Of overriding concern is maintaining the quality of the connected audio

sources. This is accomplished using a combination of excellent circuit

design and carefully selected components. The Model 74/Model 75 com-

bination is ideal for adding surround monitoring capability to disk-based

recording systems. It’s also well suited for upgrading a post-production or

broadcast facility to support multi-channel monitoring.

A complete StudioComm for Surround 74/75 system begins with the Model

75 Control Console, a compact user control surface that is intuitive and

comfortable to use. It is designed to reside at the operator’s location. The

Model 75 connects to the Model 74 Central Controller using a single 9-pin

cable. Occupying one rack space, the Model 74 provides all audio input

and output circuitry, signal routing and control, and power supply functions. To complete the system up to four Model 35 Talent

Amplifier modules can be added. These connect to the Model 74 using standard 3-pin XLR-type audio cables. Model 35 units are

typically deployed in voice-over booths, studio areas, or other locations where voice or music talent needs access to a headphone

cue feed. Each unit provides a stereo audio amplifier, user controls, and support for one or two pairs of headphones.

Model 74 Central Controller

The Model 74 Central Controller is a single rack-space unit that contains analog, digital, and power supply electronics. Four

analog sources can be connected: two surround (5.1) and two stereo. In many applications the first surround input, Surround A,

will be connected to a multi-channel output on an audio console or digital audio workstation. The second surround input, Sur-

round B, will be connected to a playback device, such as a multitrack tape recorder or disk storage system. For film or video post

applications Surround A would be considered the direct source, while Surround B would be considered the playback source.

The two stereo inputs, Stereo A and Stereo B, are provided for general-purpose use and can be connected to a variety of

2-channel direct and playback sources. For flexibility, the surround and stereo inputs are compatible with balanced or unbalanced

signals having a nominal level range of –12 dBV to +6 dBu. Fifteen-turn trim potentiometers are used to precisely calibrate the

input signals.

Key Features:

• Two 5.1 and two stereo inputs

• Two 5.1 monitor outputs

• Talkback with built-in mic

• Up to four Model 35 Talent Amplifiers can

be connected for headphone monitoring

• Downmix

• Channel mute/solo

Summary of content (5 pages)

PAGE 1
Model 74 Central Controller / Model 75 Control Console StudioComm for Surround The StudioComm for Surround Model 74 Central Controller and Model 75 Control Console work together to provide 5.1 surround and stereo source monitoring capabilities, along with a full-featured headphone “talkback” cue system. The system is a perfect fit for contemporary facilities that need to perform a variety of audio tasks.
PAGE 2
The Model 74 provides two 6-channel monitor outputs. A powerful system feature is the ability to configure the monitor outputs to meet the exact needs of an installation. In a “straight-ahead” application the monitor outputs might be configured to support two independent surround (5.1) loudspeaker systems. Alternately, one surround and one stereo monitor system could be connected. However, other more unique configurations are also possible.
PAGE 3
be muted as required. In the solo mode, one channel can be monitored while the others are automatically muted. Depending on the configuration, multiple channels can be simultaneously selected for “soloing.” The flexibility of having both mute and solo available allows an operator to quickly select the most comfortable and productive operating mode. Two functions allow the format of the monitored sources to be checked for level or phase inconsistencies. The 5.
PAGE 4
Specifications Model 74 Central Controller General Audio: Frequency Response: 20 Hz-20 kHz ±0.1 dB (down 0.5 dB @ 60 kHz), monitor outputs Distortion (THD+N): 0.
PAGE 5
Model 75 Control Console Front Panel Monitor Output Channel Mute / Solo Mute / Solo Mode Select Built-in Microphone for Talkback Downmix • Stereo to Mono • 5.