MCM Electronics

RDL Universal Audio Mixer By Radio Design Labs (ST-MX2) MCM Part #555-ST-MX2

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Universal Audio Mixer

The ST-MX2 is used in any application requiring mixing of two audio sources. A mic may be mixed with a line-level music source. Two mics may be mixed to feed the mic or line level input of a power amplifier. A mic or professional +4 dBu line-level mono sum is possible. It may be used to convert mono line-level signals from consumer to professional, or from professional to consumer format.

Specifications Top

It may also be used as a microphone preamplifier, or conversely to adapt unbalanced or balanced line-level signals into the microphone input of other equipment.

  • Two Input Audio Mixer
  • Selectable Mic or Line Level Inputs
  • Simultaneous Mic and Line Outputs
  • Add Additional Inputs to an Existing Mixer
  • Audio Output Dual-LED VU Metering
  • Balanced or Unbalanced Inputs and Outputs
  • Low-Noise and Low-Distortion Performance

Inputs (2): Selectable mic or line
Input Level for +4 dBu output: Mic: -45 dBu to -65 dBu; Max input -28 dBu
Line: -18 dBV to +10 dBu; Max input +22 dBu
Input Impedance: Mic: 200 ohm
Line: 20 Kohm bridging
Input or Output Configuration: Balanced or unbalanced
Outputs (2): MIC and LINE
Output Impedance: 150 ohm (mic or line)
Frequency Response: Mic: 25 Hz to 50 kHz (± 1 dB)
Line: 10 Hz to 30 kHz (± 0.25 dB)
THD+N: Mic: < 0.05% 25 to 20 kHz
Line: < 0.005%
IMD: < 0.004%
Output Level: Mic: -45 dBu
line: +4 dBu
Headroom: Mic Input: >22 dB (rel. -50 dBu), >32 dB (rel. -60 dBu)
Line Input: >18 dB (rel. +4 dBu), Output: >20 dB (rel. +4 dBu)
Noise (below +4 dBu): Mic: <-70 dB (150 ohm source, 50 dB gain), <-80 dB (200 ohm source, 50 dB gain)
Line: < -90 dB (reference +4 dBu, unity gain)
CMRR: Mic: > 65 dB (50 Hz to 120 Hz)
Line: > 45 dB (50 Hz to 120 Hz)
Ambient Operating Environment: 0° C to 55° C
Power Requirement: GROUND-REFERENCED, 24 VDC @ 60 mA
Dimensions: Height 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in (3.9 cm)
Package Dimensions: 2" x 2" x 4"
Shipping Weight: 0.18 lbs.

Part Numbers
MCM Part #:555-ST-MX2
Radio Design Labs Part #:ST-MX2
Package Specifications & Dimensions
Weight:0.23 lbs.
Warranty:1095 days
Need to Return?
Length:4.25 in.
Width:2.25 in.
Height:2 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages
MCM Cat 57, Page 149
MCM Cat 56, Page 164
View in Catalog

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