MLS 100 A

Four Input Stereo Audio Switcher
Key Features
  • Additional input accepts balanced/unbalanced mono line level audio signals for mixing with any of the four switchable inputs
  • Audio input gain and attenuation
  • Controllable via TouchLink® Control System, MediaLink® Controller, front panel buttons, or RS-232
  • Rack-mountable, 1U, quarter rack width metal enclosure
  • External Extron Everlast™ power supply included
The Extron MLS 100 A
Model Version Description Part #
MLS 100 A Four Input Audio 60-497-01

The Extron MLS 100 A Switcher is a compact, four-input stereo audio switcher. Inputs one through four provide unbalanced audio while an additional input is an active auxiliary line level mono audio input that can be mixed with any of the other four selectable inputs. When used with a TouchLink® Control System or MediaLink® Controller, input selection and volume control are easily achieved using RS-232 or the controller's user interface. Input selection can also be controlled using the MLS 100 A switcher's front panel buttons.

Housed in a quarter rack width metal enclosure, the MLS 100 A is ideal for installation in podiums and other space-constrained areas.

The CSR 6 Captive Screw to RCA Audio Adapter is available as an optional output adaptor, converting the captive screw output of the MLS 100 A to a pair of female RCA connectors.


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MLS 100 A
   Gain Unbalanced output: -6 dB; balanced output: 0 dB (unity)
   Frequency response 20 Hz to 20 kHz, ±0.5 dB
   THD + Noise <0.5% @ 1 kHz at nominal level
   S/N >90 dB @ 20 Hz to 20 kHz
   Crosstalk <-65 dB @ 20 Hz to 20 kHz, <-80 dB @ 1 kHz and below 60 Hz, fully loaded
   Stereo channel separation >72 dB @ 20 Hz to 20 kHz
   CMRR >75 dB @ 20 Hz to 20 kHz
Audio input
   Number/signal type 4 stereo/mono, unbalanced (switchable)
1 mono, balanced/unbalanced aux-mix (always active, non-switchable)
   Connectors (5) 3.5 mm captive screw connectors, 3 pole
   Impedance >10k ohms unbalanced, >20k ohms balanced, DC coupled
   Nominal level -20 dBV (100 mV), -10 dBV (316 mV), 0dBu (0.775 V), or +4 dBu (1.23 V); (configurable)
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
+4 dBu and 0 dBu are professional audio line level standards.
-10 dBV and -20 dBV are semiprofessional, computer audio, and consumer audio standards.
   Maximum level +14 dBu, (balanced or unbalanced) at stated %THD+N
   Input gain adjustment –18 dB to +24 dB, adjustable per input (via RS-232/control software)
   Aux/Mix level adjustment -43 dB to +24 dB (adjustable only via front panel)
Audio output
   Number/signal type 1 stereo or mono, balanced/unbalanced
   Connectors (1) 3.5 mm captive screw connector, 5 pole
   Impedance 50 ohms unbalanced, 100 ohms balanced
   Gain error ±0.1 dB channel to channel
   Maximum level (Hi-Z) >+21 dBu, balanced or unbalanced at 1% THD+N
   Maximum level (600 ohm) >+15 dBm, balanced or unbalanced at 1% THD+N
    NOTE     An unbalanced-wired output results in a 6 dB attenuation.  A balanced-wired output has unity (0 dB) gain/attenuation.
Control/remote — switcher
   Serial control port RS-232, 3.5 mm, 5 pole captive screw connector
   Baud rate and protocol 9600 baud, 8 data bits, 1 stop bit, no parity
   Serial control pin configuration A = Tx, B = Rx, D = Gnd
   Program control Extron control/configuration program for Windows®
Extron Simple Instruction Set (SIS)
   Power Supplied by an optional MediaLink Controller (MLC) or an external power supply
   Power supply External, included
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 0.5 A, 6 watts
   Power input requirements 12 VDC, 0.4 A
   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
      Rack mount Yes, with optional 1U rack shelf
      Furniture mount Yes, with optional mini under-desk mounting kit
      Pole mount Yes, with optional mini pole mounting kit
   Enclosure type Metal
   Enclosure dimensions 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(42 mm H x 110 mm W x 76 mm D)
(Depth excludes connectors and buttons.)
   Product weight 0.7 lbs (0.3 kg)
   Regulatory compliance CE, C-Tick, c-UL, FCC Class A, ICES, UL, VCCI
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-497-01 2.44" (6.2 cm) 7.13" (18.1 cm) 9.5" (24.1 cm) 1.91 lbs (0.87 kg)


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.