Studio Technologies Model 372A Intercom Beltpack

ITEM #: STCH-M372A MFG #: M372A

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    M372A - Overview

    Why use the Studio Technologies MODEL 372A ? Having one talk and two listen channels may seem unconventional. But it can be ideal for many "real-world" applications. Often an intercom user is primarily listening and non-verbally responding to requests made by producers, directors, or stage managers. Typically, the Model 372A will be configured to be part of one talk-and-listen party-line intercom channel. During the time that an event is taking place the listen function will serve a much more important role; the talk function will rarely be utilized. However, the second listen channel will often be important. Typically, it will be designated as a program-listen or "show audio" channel. The two listen channels, along with the ability to receive and display call signals, allow the Model 372A to very effectively support production personnel in a compact and cost-effective manner.

    Only a single Power-over-Ethernet (PoE) connection is required for operation. Key user features can be easily configured using the STcontroller software application. Configurable parameters include electret microphone powering, microphone preamplifier gain, talk button operation, and headphone channel assignment. Features include integrated sidetone, call signal receive display, and remote mic kill ("talk off"). The range of capabilities, along with the excellent audio quality provided by the digital audio signal path, offers a unique and powerful user experience.

    Setting up and configuring a Model 372A is simple. An etherCONr RJ45 receptacle is used to interconnect with a standard twisted-pair Ethernet port associated with a local-area network (LAN). This connection provides both power and bidirectional digital audio. The Model 372A is compatible with both broadcast and "gaming" headsets.

    A broadcast or intercom-style headset with a dynamic or electret (DC-powered) microphone can be interfaced with the Model 372A using a 5-pin XLR connector. The Model 372A also directly supports connection of earbuds or gaming headsets that utilize a 3.5 mm 4-conductor TRRS plug. These moderately priced devices, commonly associated with mobile phones or personal computers, are often of high-quality and may be preferred for some applications. With the Model 372A's moderate price and ability to support a broad range of headset devices the overall cost of deploying an intercom system can often meet budget goals

    • Features:

      • Dante ™ audio-over-Ethernet technology
      • One talk and two listen channels
      • Supports dynamic and electret microphones
      • 5-pin female XLR headset connector
      • 3.5 mm 4-conductor TRRS headset connector
      • Call receive and display function
      • Excellent audio quality
      • Uses STcontroller for configuration
      • AES67 and Dante Domain Manager ™ (DDM) support
      • Power-over-Ethernet (PoE) powered
    • Specifications:

      • Power Source:
      • Power-over-Ethernet (PoE): class 1 (very low power, =3.84 watts) per IEEEr 802.3af

        Network Audio Technology:
      • Type: Dante audio-over-Ethernet
      • AES67-2013 Support: yes
      • Dante Domain Manager (DDM) Support: yes
      • Bit Depth: up to 24
      • Sample Rate: 48 kHz
      • Number of Transmitter (Output) Channels: 1
      • Number of Receiver (Input) Channels: 2
      • Dante Audio Flows: 4; 2 transmitter, 2 receiver

        Network Interface:
      • Type: 100BASE-TX, twisted-pair Ethernet, Power-over-Ethernet (PoE)
        supported Data Rate: 100 Mb/s (10 Mb/s and 1000 Mb/s "GigE" Ethernet not supported) Compatibility - Headset A: monaural single- or
        dual-ear broadcast-style with dynamic or electret (low-voltage DC- powered) microphone: pin 1 mic -/shield/screen; pin 2 mic +; pin 3
        phones -; pin 4 phones +
      • Compatibility - Headset B: CTIA™/AHJ configuration (typically uses electret powered mic): tip
        phones left; ring 1 phones right; ring 2 common; sleeve mic
      • Audio Channels: 1 talk, 2 listen

        Microphone Input:
      • Compatibility: dynamic or electret (low-voltage DC-powered) microphones
      • Type: unbalanced
      • Electret Microphone Power: 3.3 volts DC via 2.00 k resistor, selectable on/off
      • Impedance: 1 k ohms, nominal, microphone power off; 690 ohms, nominal, microphone power on
      • Gain: 24, 30, 36, 42, or 48 dB, selectable, ref. -60 dBu input to Dante output (-20 dBFS nominal)
      • Frequency Response: 40 Hz to 20 kHz, -3 dB
      • Distortion (THD+N): <0.02% (at minimum gain)
      • Dynamic Range: 91 dB of dynamic range

      • Application: applies to Dante transmitter (output) channel and sidetone audio
      • Threshold: 2 dB above nominal level (-19 dBFS)
      • Slope: 2:1
      • Status LED: compressor active

        Headphone Output:
      • Type: 2-channel
      • Compatibility: intended for connection to stereo (dual-channel) or monaural (single-channel) headsets
        with nominal impedance of 50 ohms or greater
      • Maximum Output Voltage: 2.8 Vrms, 1 kHz, 150 ohm load
      • Frequency Response: 20 Hz to 10 kHz, -3 dB
      • Distortion (THD+N): <0.002%
      • Dynamic Range: >100 dB

        Call Receive Function:
      • Implementation: monitors both Dante receiver (input) channels for presence of call signals
      • Signaling Method: 20 kHz, ±800 Hz, within audio channels
      • Call Receive Level: -27 dBFS minimum

      • Headset A: 5-pin female XLR
      • Headset B: 4-conductor (TRRS) 3.5 mm jack, per Japanese standard JEITA/EIAJ RC-5325A
      • Ethernet: Neutrik NE8FBH etherCON RJ45 receptacle
      • USB: type A receptacle (located inside Model 373A's enclosure and used only for application firmware

        Configuration: requires Studio Technologies' STcontroller software application,
        version 2.01.00 and later

      • Operating Temperature: 0 to 50 degrees C (32 to 122 degrees F)
      • Storage Temperature: -40 to 70 degrees C (-40 to 158 degrees F)
      • Humidity: 0 to 95%, non-condensing
      • Altitude: not characterized

    M372A - Required Accessories

      California Residents:
      Cancer and Reproductive Harm -