Radio Design Labs ST-MX2 2 Channel Audio Mixer

2 Channel Audio Mixer - Microphone or Line Input and Output

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. 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 Ω
  Line: 20 kΩ bridging
• Input or Output Configuration: Balanced or unbalanced
• Outputs (2): MIC and LINE
• Output Impedance: 150 Ω (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 Ω source, 50 dB gain), <-80 dB (200 Ω 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 Type: Cardboard Box
• Package Dimensions: 2 x 2 x 4 in.
• Shipping Weight: 0.18 lbs.
• WEEE weight: 0.125 lbs.
• Tariff code: 8518.40.2000