Radio Design Labs ST-MX2

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.

PS24AS power supply not included.

• 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:

• Input or Output Configuration: Mic: 200 Ω; Line: 20 kΩ bridging

• Balanced or unbalanced

• Outputs (2):

• Output Impedance: MIC and LINE 150 Ω (mic or line)

• Frequency Response:

• Mic: 25 Hz to 50 kHz (+/- 1 dB)

• Line:

• THD+N:10 Hz to 30 kHz (+/- 0.25 dB)

• Mic: < 0.05% 25 to 20 kHz

• Line: < 0.005%

• IMD:

• Output Level: < 0.004%

• Mic: -45 dBu; line: +4 dBu • Headroom:Mic Input: >22 dB (rel. -50 dBu)

• Mic Input: >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)

• Mic: <-80 dB (200 Ω source, 50 dB gain)

• Line: <-90 dB

• CMRR:

• Mic: > 65 dB (50 Hz to 120 Hz)

• Line: > 45 dB (50 Hz to 120 Hz) Power Requirement: GROUND-REFERENCED 24 Vdc @ 60 mA

• Ambient Operating Environment:0° C to 55° C