MVC 121 Retired

Microphone Volume Control and Line Level Mixer
Key Features
  • Mixes two microphone inputs and a stereo line level input
  • Audio mixing and volume control via front panel or RS-232
  • 48 volt phantom power for condenser microphones
  • Fixed and variable line level outputs
  • Individual volume adjustment
  • Contact closure mute control
The Extron MVC 121
Model Version Description Part #
 MVC 121 Microphone & Line Level Mixer 60-572-01 Retired

This product has been retired.
Suggested Replacement
MVC 121 Plus

The Extron MVC 121 is a high performance Microphone Volume Control and Line Level Mixer. Equipped with RS-232 control capability, the MVC 121 is easy to integrate into existing AV systems where control needs to be simple and centralized, including such environments as small classrooms and meeting rooms. The MVC 121 is designed for intuitive operation with two microphone/line level inputs and a third, line level-only input, each with its own volume control. The mixer also provides 48 V microphone phantom power to enable the use of condenser microphones.

Features

  • Mixes two microphone inputs and a stereo line level input — Two mono microphone or line level inputs are mixed with a stereo line level input.
  • Inputs: Captive screw connectors
  • Outputs: Captive screw connectors
  • Audio mixing and volume control via front panel or RS-232 — A rear panel, captive screw port provides RS-232 control of audio mixing and volume adjustment.
  • Two microphone inputs with mic/line level option - DIP switch-selectable — The microphone inputs of the MVC 121 will accommodate either a mic level wired microphone or a line level wireless microphone.
  • 48 volt phantom power for condenser microphones
  • Fixed and variable line level outputs — The fixed output is ideal for recording devices or other equipment such as ALS - Assistive Listening Systems, while the variable output is designed to drive a power amplifier.
  • Smooth, 0.5 dB volume transitions — Adjustments are made in 0.5 dB increments, ensuring smooth transitions when changing volume levels.
  • Front panel volume level LEDs — The MVC 121 features one set of four LEDs to display volume levels for each channel.
  • Individual volume adjustment — Each input, as well as the master program output, has its own volume adjustment, which can be individually turned on or off.
  • Contact closure mute control — For simple applications without a control system, the microphone and line level inputs can be individually muted via contact closure.
  • Front panel security lockout — The MVC 121 offers two modes of front panel security lockout for limited control and full lockout to prevent unauthorized use or tampering.
  • Rack-mountable 1U, quarter rack width metal enclosure
  • Highly reliable, energy-efficient external universal power supply included, replacement part #70-775-01 — Provides worldwide power compatibility, with high demonstrated reliability and low power consumption for reduced operating costs.
OPTIONAL ACCESSORIES
  RSB 129 Basic Rack Shelf for 9.5" Deep Products
  RSU 129 Universal Rack Shelf Kit for 9.5" Deep Products
  RSF 123 Rack Shelf Kit for 3.5" Deep Products

Specifications

MVC 121
Audio
   Gain from mic input to both fixed and variable outputs at default settings
      Mic DIP switch = line level Unbalanced output: +20 dB; balanced output: +26 dB
      Mic DIP switch = mic level Unbalanced output: +50 dB; balanced output: +56 dB
   Gain from main input to both fixed and variable outputs at default settings
    Unbalanced output: 0 dB; balanced output: +6 dB
   Master volume range 0 to 92 ("off", and -79 dB to +12 dB in 0.5 dB steps)
   Mic 1, 2, and Main 3 gain range -79 dB to +12 dB in 0.5 dB steps
   Frequency response 20 Hz to 20 kHz, ±0.05 dB
   THD + Noise 0.03% @ 1 kHz at nominal level
   S/N >90 dB, balanced, at maximum output
   Crosstalk <-80 dB @ 1 kHz, <-60 dB @ 20 kHz, fully loaded
   Stereo channel separation >80 dB @ 1 kHz, >60 dB @ 20 kHz
   CMRR >75 dB @ 20 Hz to 20 kHz
    NOTE     All input gain default settings are at 80. The master volume default setting is 50 (-30 dB).
Audio input
   Number/signal type 
      Microphone inputs 2 mono, balanced/unbalanced
      Main input 1 stereo, balanced/unbalanced
   Connectors 
      Microphone inputs (1) 3.5 mm captive screw connector, 5 pole
      Main input (1) 3.5 mm captive screw connector, 5 pole
   Impedance >10k ohms, DC coupled
   Nominal level (mic inputs) 
      DIP switch = line level -30 dBV (32 mV) for a wireless microphone
      DIP switch = mic level -60 dBV (1 mV) for a wired microphone
   Nominal level (main input) -10 dBV (316 mV)
   Maximum level +20 dB above nominal level, (balanced or unbalanced) at 1% THD+N
   Input gain adjustment -79 dB to +12 dB, adjustable per input
   Input level sensitivity (mic inputs)
      DIP switch = line level -42 dBV (8 mV) for nominal output
      DIP switch = mic level -72 dBV (0.25 mV) for nominal output
   Input level sensitivity (main input) -22 dBV (79 mV) for nominal output
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Audio output
   Number/signal type 2 stereo, balanced/unbalanced
   Connectors (2) 3.5 mm captive screw connector, 5 pole
   Impedance 50 ohms unbalanced, 100 ohms balanced
   Gain error ±0.1 dB channel to channel
   Nominal level +4 dBu (1.23 V), balanced output (when gain is set to +6 dB)
-10 dBV (0.316 V), unbalanced output
   Maximum level (Hi-Z) >+24 dBu, balanced; >+18 dBu, unbalanced at 1% THD+N
   Maximum level (600 ohm) >+15 dBm, balanced at 1% THD+N
Control/remote — mixer/volume controller
   Serial control port RS-232, 3.5 mm female captive screw connector (3 poles of a 6 pole connector)
   Baud rate and protocol 9600, 8-bit, 1 stop bit, no parity
   Serial control pin configuration 1 = TX, 2 = RX, 3 = GND
   Contact closure mute control 1 = mic 1, 2 = mic 2, 3 = main input
   Program control Extron control program for Windows®
Extron Simple Instruction Set (SIS)
General
   External Power supply 100 VAC to 240 VAC, 50-60 Hz, external; to 12 VDC, 1 A, regulated
   Power input requirements  12 VDC, 0.5 A.
   Ambient temperature/humidity Storage -40° to +158°F (-40° to +70°C) / 10% to 90%, noncondensing
Operating +32° to +122°F (0° to +50°C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
   Mounting 
      Rack mount Yes, with optional 1U rack shelf
      Furniture mount Yes, with optional mini under-desk mounting kit
      Pole mount Yes, with mini pole mount kit
   Enclosure type  Metal
   Enclosure dimensions 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(4.3 cm H x 10.9 cm W x 7.6 cm D)
(Depth excludes connectors and knobs.)
   Product weight  0.6 lbs (0.3 kg)
   Shipping weight  3 lbs (2 kg)
   Vibration  ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance 
      Safety CE, c-UL, UL
      EMI/EMC CE, C-tick, FCC Class A, ICES, VCCI
   Product warranty 3 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
(7.6-101609-D6)

Diagram

MVC 121 System Diagram

Panel Drawing

MVC 121 Panel Drawing