Studio Technologies Model 220 Announcers Console

MODEL 220 - Overview

• Features:

  • Microphone preamp with selectable gain and 48 V phantom power
  • Two line-level inputs
  • Broadcast IFB input
  • Three pushbutton switches offer programmable "click-free" audio path control
  • Transformer-balanced main output
  • Two line-level talkback outputs
  • Stereo headphone monitoring of selectable sources
  • Two rotary headphone output level controls
  • Microcontroller-directed audio routing
  • Auxiliary relay contacts
  • Powered by IFB or by external DC source
  • All configuration switches and trim potentiometers accessible via the bottom of the enclosure
   

• Specifications:

  • General Audio:
  • Frequency Response: 10 Hz-20 kHz, ±0.2 dB, mic in/main out
  • Distortion (THD+N): 0.008%, measured at 1 kHz, mic in/main out
  • S/N Ratio: 86 dB, referenced to -42 dBu mic in/-2 dBu main out
  • Dynamic Range (A-weighted): 108 dB
    
    Connectors:
  • Mic In, IFB In, Line In 1 & 2: 3-pin female XLR
  • Main Out, Talkback Out 1 & 2: 3-pin male XLR
  • Headphone Out: ¬-inch 3-conductor phone jack
  • 24 Vdc Power In: coaxial power jack, 2.1 x 5.5 mm, locking bushing, compatible with Switchcraft
    S760K plug
    
    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, nominal
  • CMRR: >80 dB, 20 Hz-20 kHz, 40 dB gain
  • Gain Range: 20 to 60 dB, nominal, adjustable in 10 dB steps
  • Compatibility: dynamic or phantom-powered mics
  • Phantom Power: 48 Vdc, nominal, meets IEC 1938 P48 standard
    
    IFB Input:
  • Type: 2-channel, unbalanced (pin 1 common; pin 2 DC with channel 1 audio; pin 3 channel 2 audio)
  • Impedance: 10 k ohms, nominal
  • Nominal Level: -10 dBu
    
    Line Inputs: 2
  • Type: balanced, transformer-coupled
  • Impedance: 10 k ohms, nominal
  • Nominal Level: -12 dBV to +6 dBu, adjustable
    
    Compressor:
  • Threshold: 2 dB above nominal level
  • Attack/Release Time: 2 mSec/100 mSec, nominal
  • Slope: 5:1, nominal
  • Status LED: compressor active
    
    Main Output:
  • Type: balanced, transformer-coupled
  • Nominal Level: -2 dBu
  • Maximum Level: +20 dBu into 2 k ohms
  • Impedance: 100 ohms, nominal
    
    Talkback Outputs: 2
  • Type: transformer-coupled with series capacitors and isolation resistors
  • Impedance: 600 ohms, nominal
  • Nominal Level: +4 dBu
  • Maximum Level: +11 dBu (compressor restricts maximum)
    
    Headphone Output: 1, 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: 12 Vpp, 150 ohm load
    
    Auxiliary Relay:
  • Function: software configurable
  • Contacts: 2, form C (Common, Normally Closed, Normally Open)
  • Rating: 1 A, 30 W (resistive)
  • Access: requires user-implemented connector scheme
    
    Power Sources:
  • IFB: 24-32 Vdc, 125 mA
  • External: 24 Vdc nominal, 80 mA @ 24 Vdc; acceptable range 20-30 Vdc. Each unit shipped with a universal input/24 Vdc output power supply.