Four-channel mono audio mixers in the popular RDL modular Rack-Up formats. Different models have four or five channels, microphone/line and line input types are offered. Powering is by external 24V DC supply. Accessories are available for use from AC supplies, and to mount the mixers in a variety of environments.
RU-MX4, RU-MX4T Microphone and Line Mixers
A four-channel mixer with expansion capability. Each channel has XLR and RCA (phono) connectors, for balanced microphone and unbalanced line inputs respectively, 24V phantom power switch, dual-LED level indicator and single rotary fader. A further unbalanced RCA (phono) connection provides a direct input to the mix amplifier for cascading mixers. The mix is displayed on an eight-LED VU meter and a soft-knee compressor may be switched in/out on the rear panel. The main output uses a balanced XLR connector, and an RCA (phono) provides unbalanced output. Both outputs follow a master output level control. The XLR output may be switched between microphone and line level. The RU-MX4T version has an output transformer for isolation.
Microphone inputs: -58 to +20dBu (phantom off) or -41 to +4dBu (phantom on) for +4dBu output, 2kohms, balanced, 80Hz high-pass filter. Line inputs: -25 to +20dBV for +4dBu output, -10dBV nominal, 20kohms, unbalanced. Response: Microphone 80Hz-30kHz +/- 1.5 dB, -10dB at 20Hz (high-pass filter); line 20Hz-30kHz, +/- 0.25dB. Distortion: Better than 0.1% (80Hz to 20kHz), microphone, 0.02% line, THD plus noise. Noise: Better than -82dB for four line sources at unity gain, -64dB for four microphone inputs at 60dB gain, wideband, referred to +4dB output. Outputs: +4dBu, 150ohms, balanced and -10dBV unbalanced. Power source: 24V DC, 150mA, ground-referenced. Dimensions: 150 x 122 x 43 (l x d x h) mm. These modules are Max Rack-Up format, where depth changes depending on function of the module.
Included accessories: Datasheet and power interconnection cable to cascade power to another module.
This has four balanced, line-level inputs instead of the four microphone inputs of the RU-MX4. There is no phantom power or compressor, and hence, the associated switches, but is otherwise similar to the RU-MX4.
Specification mostly as RU-MX4. Balanced inputs: -13 to +22dBu for +4dBu output, 20kohms. Distortion: Better than 0.01%, THD plus noise.
Included accessories: Datasheet and power interconnection cable to cascade power to another module.
RU-MX5ML Microphone and Line Mixer
A five channel mixer with detachable barrier block terminals for connection, aimed at permanent installation. Four inputs channels each have microphone and line input terminals, one of which is used at a time. The fifth input is line level only. Microphone inputs are intended for low-impedance balanced types although high-impedance unbalanced types may also be used. Line inputs are balanced, but may be connected unbalanced. Phantom power, 24V DC, may be jumpered to any or all microphones. Each channel has a rotary gain control. There is a separate unbalanced mix input for cascading mixers and similar applications. There are two balanced outputs, one microphone level, one line level. Two peak-reading LED indicators provide output metering.
Microphone inputs (max): -20dBu for +4dBu output, >1.2kohms, balanced. Line inputs: +24dBu for +4dBu output, -10dBV nominal, >10kohms, balanced. Response: Microphone 80Hz-40kHz +/- 1.0 dB; line 10Hz-35kHz, +/- 0.5dB. Distortion: Better than 0.03% (mic), 0.003% (line), THD. Noise: Better than -70dB, all channels active, microphone gain at 50dB, line gain at unity, referred to +4dB output. Outputs: +4dBu, 150ohms, balanced (line), and -45dBu, 150 ohms, balanced (mic). Power source: 24V-33V DC, 65 mA, ground-referenced. Dimensions: 150 x 122 x 43 (l x d x h) mm.
Included accessories: Datasheet.