RU-MX5 RADIO DESIGN LABS, RU-MX5 Datasheet - Page 2

• Manufacturer Part Number: RU-MX5
• Description: RDL FIVE INPUT MIC/LINE MIXER, INPUT IMPEDANCE: (BALANCED MIC) 150-600 OHM, (UNBALANCED MIC) 5 KOHM, (BALANCED OR UNBALANCED LINE) 10 KOHM, MIC LEVEL OUTPUT: -45 DBU, LINE LEVEL OUTPUT: DBU AT 150 OHM, MIC FREQUENCY RESPONSE: 70 HZ-
• Manufacturer: RADIO DESIGN LABS

RU-MX5
Rear Panel View
AUDIO INPUTS: Inputs are labeled 1 through 5., L is for line level inputs, M is for mic level inputs. You
may use either the mic or line terminals for inputs 1-4, Input 5 is line only. Both may not be used
simultaneously. Connect balanced audio to +, -, and ground. Connect unbalanced audio to + terminal;
connect - to ground terminal together with the unbalanced shield.
PHANTOM MIC OPERATION: The line input terminals are used to jumper phantom voltage to a given
microphone. If Mic 1 is to be phantom powered, connect the balanced mic to M1+, M1-, and and shield to
GND. Then connect L1-, L1+ and PHM (phantom) terminals together. Any or all the mic inputs may be
phantom powered in this manner. External phantom voltage source can not exceed 24 Vdc.
MIX INPUT: This input is a direct input to the summing amplifier. An unbalanced source, such as another
mixer, may be connected to this input. This input will always feed the output of this mixer at unity gain.
Connect the positive-wire to the MIX terminal, connect the shield to one of the GND terminals.
AUDIO OUTPUTS: Both a line level and a mic level output are provided. They are labeled L for line, and
M for mic. For balanced wiring, connect the conductors to + and - terminals. The ground is typically
connected at the OTHER end for line output, and at both ends for mic level signals. If it is desired to
connect the ground, use the nearest GND terminal. For unbalanced wiring, connect the signal to output +,
connect the shield to the nearest GND terminal. Do not connect the output - to the shield or ground
terminals. Both outputs may be used at the same time to feed two unbalanced loads.
POWER CONNECTION: Connect a single-ended 24 Vdc power source to the +24V terminal. Connect the
ground return from that supply to the GND terminal directly below the +24V Terminal. Power supply
ground and circuit ground are common.
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