Studio Technologies M233 Announcer's Console, XLR, Dual Talkback

The Model 233 Announcer's Console is the premier audio control "hub" for announcers, commentators, and live-event production personnel. Compatible with essentially all broadcast and production audio system environments, the tabletop unit is ideally suited for numerous applications including stadium announce, on-air television, and radio broadcasting.

Three pushbutton switches—Main, Talkback 1, and Talkback 2—operate under microprocessor control to offer unmatched flexibility and "click-free" audio routing. The Main button controls the main output with operating modes that include push-to-mute (cough), push-to-talk, and latching. The Talkback 1 and Talkback 2 buttons control dedicated line-level outputs to provide talent-originated cue signals to production personnel. The Talkback buttons can also be configured to send audio to the dual-channel intercom interface. "Stadium announce" mode and "production" mode enable special feature sets for these applications. Simple customization of the button labels ensures the user is presented with an easy-to-use set of controls and indicators.

Featuring a studio-inspired low-noise/low-distortion preamplifier design, adjustable gain, and 48 volt phantom power, the Model 233 is compatible with balanced dynamic and condenser microphones. With high output capability and the use of an output transformer expressly designed for professional audio applications, the main output offers broadcast-quality audio as the stadium announcement, on-air, or other primary audio feed.

The headphone output's circuitry provides high output levels with very low distortion and noise. The user can monitor up to four external audio sources: line input 1, line input 2, intercom channel 1, and intercom channel 2. Possible signal sources for the line-level inputs include off-air receivers, wireless IFB systems, and audio consoles. The Model 233's intercom interface is compatible with standard party-line intercom systems from manufacturers such as RTS™ and Clear-Com®. If desired, broadcast IFB can also be connected to the intercom input. Each source can be individually assigned to the left, right, or both channels of the binaural headphone output. Three rotary controls allow the user to adjust the levels of the externally connected sources and the user’s sidetone. Studio Technologies' unique "auto-terminate" feature ensures talkback-to-intercom "squeal" will never occur in the headphone output if an intercom line is disconnected.

Features:

• Microphone preamp with selectable gain and 48 volt phantom power
• Two line-level inputs
• Three pushbutton switches offer programmable "click-free" audio path control
• Transformer-balanced main output
• Two line-level talkback outputs
• Dual-channel intercom interface with "auto-terminate"
• Stereo headphone monitoring of selectable sources and integrated sidetone
• Three rotary headphone output level controls for external sources and sidetone
• Microcontroller-directed audio routing
• Tally status output and auxiliary relay contacts
• Powered by intercom or by supplied external DC source
• All configuration switches and trim potentiometers accessible via the bottom of the enclosure

Specifications:

• General Audio:
  • Frequency Response: Frequency Response: 20 Hz-20 kHz, ±0.1 dB, mic in/main out
  • Distortion (THD+N): 0.008%, measured at 1 kHz, mic in/main out
  • S/N Ratio: 80 dB, referenced to –46 dBu mic in/–2 dBu main out
• Connectors:
  • Mic In, Line In 1 & 2, Intercom Interface: 3-pin female XLR-type
  • Main Out, Talkback Out 1 & 2: 3-pin male XLR-type
  • Headphone Out: ¼-inch 3-conductor phone jack
  • 24 Vdc Power In: 2.1 x 5.5 mm coaxial power jack
  • Spare Connector Locations: 3
  • Allows up to three Neutrik NC*D-L-1 connectors to be installed (*=3F, 3M, 5F, 5M, 6F, 6FS, etc.)
• Microphone Input/Preamplifier:
  • Type: electronically balanced
  • Input Impedance: 2 k ohms
  • Gain Range: 20 to 60 dB, adjustable in 10 dB steps
  • Compatibility: dynamic or phantom-powered mics
  • Phantom Power: 48 Vdc, nominal, meets IEC 61938
• Compressor:
  • Threshold: 2 dB above nominal level
  • Attack/Release Time: 2 mSec/100 mSec
  • Slope: 5:1
  • Line Inputs: 2
  • Type: balanced, transformer-coupled
  • Impedance: 10 k ohms
  • Nominal Level: –12 dBV to +6 dBu, adjustable
• Intercom Interface:
  • Type: 2-channel, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3 channel 2 audio)
  • Compatibility: single- and dual-channel intercom systems such as from RTS™ and Clear-Com®
  • Impedance: 10 k ohms
  • Nominal Level: –10 dBu
• Main Output:
  • Type: balanced, transformer-coupled
  • Nominal Level: –2 dBu
  • Maximum Level: +20 dBu into 2 k ohms
  • Impedance: 100 ohms
• Line-Level Talkback Outputs: 2
  • Type: transformer-coupled with series capacitors and isolation resistors
  • Impedance: 600 ohms
  • Nominal Level: +4 dBu
  • Maximum Level: +11 dBu (compressor restricts maximum)
• Headphone Output: 1, binaural (stereo)
  • Compatibility: intended for connection to mono or stereo headphones or headsets with nominal impedance of 100 ohms or greater
  • Type: voltage driver
  • Maximum Output Voltage: 8 Vpp, 150 ohm load
• Auxiliary Relay:
  • Contacts: 2, form C (Common, Normally Closed, Normally Open)
  • Rating: 1 A, 30 W (resistive)
• Tally Output: 3.5 Vdc, 12 mA maximum, nominal
• Power Sources:
  • Intercom Interface: 24-32 Vdc, 125 mA
  • External: 24 Vdc, 90 mA; acceptable range 20-30 Vdc. All units include a universal input/24 Vdc output power supply.
• Dimensions (Overall):
  • 8.1 inches wide (20.6 cm)
  • 3.3 inches high (8.4 cm)
  • 8.5 inches deep (22.4 cm)
  • Weight: 4.5 pounds (2.1 kg)