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.
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
Operating Temperature (Maximum):
131 F
Operating Temperature (Minimum):
32 F
Maximum Frequency Response (Bandwidth):
100 kHz
Maximum Frequency Response (Bandwidth):
100000 Hz
Minimum Frequency Response (Bandwidth):
50 Hz
Minimum Frequency Response (Bandwidth):
0.05 kHz
Total Harmonic Distortion + Noise (THD+N):
0.01 %
Inputs (3):
Mic: 600 ohm
Inputs Line:
50 K ohm balance
Maximum Inplut Signal:
Mic -18 dBu
Maximum Inplut Signal Line:
+25 dBu
Gain (each input)Mic::
Adjustable from OFF to 60 dB
Gain line:
Adjustable from OFF to 21 dB
Output:
150 ohm balanced
Output:
75 ohm unbalanced
Noise (each input):
Mic: < -70 dB (50 dB gain)
Noise Line::
< -82 dB (unity gain)
Headroom:
18 dB
CMRR:
Mic: > 60 dB
CMRR Line: > 50:
dB (50 to 120 Hz)
Power Requirement:
24 to 33 VDC @ 55 mA
FP-MX4
- 4 Mic or Line Input Mixer - Mic and Line Out
RU-MX4
- Pro 4 Input Mic/Line Mixer W/Phntm - Mic and Line Out
RU-MX4L
- Pro 4 Input Line Mixer - Mic and Line Out
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