Precision Audio and AV Interface Products

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ST-UMX3 3x1 Universal Audio Mixer - 3 microphone or line inputs x 1 microphone or line output

  • Audio Mixing with Up To Three Inputs
  • Switch-Selectable Mic or Line Inputs
  • Switch-Selectable Mic or Line Output
  • Add Additional Microphone or Line Level Inputs to an Existing Mixer
  • Combine Signals of Different Level, Impedance, or Balanced /Unbalanced Configuration
  • Overview
  • Specifications
  • Related Products
  • Accessories
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  • Product Series
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The ST-UMX3 is a three-channel audio mixer for combining mic-level or line-level signals to a single output. A MIC/LINE switch is provided for each input. A separate MIC/ LINE switch selects the output level. Each input features a separate preamplifier circuit, which isolates it from the other inputs. An audio taper single turn gain adjustment is provided for each of the three input preamps. Signals from the three preamps are actively summed and fed to the output amplifier which includes an RDL® dual-LED VU meter.

Each input level is set while observing the LED output level meter. The dual-LED output meter follows standard VU ballistics. The intensity of the green LED progresses from minimum at -11 dBu to full intensity at +4 dBu.

The flexibility of switching each input and the output between MIC or LINE allows installers to address a wide variety of mixing solutions with only one product type.

Videos

Applications

Inputs (3):
Mic: 600 Ω; Line: 50 kΩ, balanced
NOTE: MIC INPUTS ON ST-UMX3 ARE NOT PROTECTED AGAINST PHANTOM VOLTAGE. USE THE ST-MPA24 or ST-MPA48 MIC PHANTOM ADAPTER.
Maximum Input Signal:
Mic: -18 dBu; Line: +25 dBu
Gain (each input):
Mic: Adjustable from OFF to 60 dB
Line: Adjustable from OFF to 21 dB
Output:
150 Ω balanced; 75 Ω unbalanced
Output Signal:
Mic: 50 dB below line level
Line: +4 dBu nominal
THD+N:
< 0.006%
IMD:
Mic (@ 50 dB gain): < 0.04%
Line: < 0.008%
Freq. Response:
Mic: 50 Hz to 100 kHz (± 1 dB)
Line: 10 Hz to 100 kHz (± 0.05 dB)
Noise (each input):
Mic: < -70 dB (50 dB gain)
Line: < -82 dB (unity gain)
Headroom:
18 dB
CMRR:
Mic: > 60 dB
Line: > 50 dB, (50 to 120 Hz)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 55 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.175 lbs.
WEEE weight:
0.12 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
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A&E Specifications:
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STICK-ON SERIES

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

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ST-UMX3 ST-UMX3