RDL 5 input Mixer Part

The RDL RU-MX5ML is a five-channel audio mixer built around four selectable microphone-or-line inputs and one line-level input, with an additional direct MIX input. Switch-selectable 24 V phantom power supports compatible microphone connections, while balanced mic- and line-level outputs provide two output-level options. Audio connections use detachable terminal blocks, and the compact unit combines flexible source handling with studio-quality low-noise performance.

Ideal Use Cases

The RU-MX5ML fits systems that need to combine several balanced microphone and line sources in a compact hardware mixer. Its four selectable mic/line inputs allow the mixer to accommodate different source types, while the dedicated line input adds a fifth mixing channel. The direct MIX input accepts an additional mix signal. Balanced connections, detachable terminal blocks, and both mic- and line-level outputs support organized wired integration where multiple source and output levels must be managed.

Why Choose This Model

This model combines source flexibility, adjustable gain, phantom power, metering, and two balanced output levels in one compact unit. The specified gain ranges are Off to 65 dB for microphone signals and Off to 15 dB for line signals. Phantom power is switch-selectable at 24 V and is specified to IEC 61938: 2013. A dual-LED VU meter, calibrated to +4 dBu, provides output-level monitoring. The mixer also offers 20 dB of headroom above its +4 dBu output.

Installation and Integration

Inputs, outputs, and the power connection are presented on detachable terminal blocks. The enclosure measures 1.7 inches high by 5.8 inches wide by 4.8 inches deep, equivalent to 4.3 by 15.0 by 12.2 centimeters. Its required power is ground-referenced 24 Vdc at 75 mA, with a maximum of 120 mA when phantom power is included. A power supply is not included. The recommended supplies are the PS-24AS for the USA and the PS-24AX for international use. The specified ambient operating range is 0° C to 55° C.

Performance Highlights

The four selectable inputs provide balanced microphone or line operation. Microphone input impedance is greater than 1.2 kΩ balanced, while line input impedance is greater than 10 kΩ balanced. Maximum input levels are -20 dBu for microphone signals and +24 dBu for line signals. Microphone frequency response is 80 Hz to 40 kHz within ±1 dB, with an integral high-pass filter producing a response below -6 dB at 20 Hz. Line frequency response is 10 Hz to 35 kHz within ±0.5 dB. Microphone THD+N is specified below 0.03%.

The two balanced outputs are specified at -45 dBu for microphone level and +4 dBu for line level, with a balanced output impedance of 150 Ω. Noise is below -70 dB relative to the +4 dBu output from 20 Hz to 20 kHz when all microphone channels operate at 50 dB gain or when one microphone channel operates at 60 dB gain. With all channels off, noise is below -90 dB relative to the +4 dBu output across the same frequency range. CMRR is specified at greater than -65 dB for microphone signals from 10 Hz to 10 kHz and greater than -45 dB for line signals.

What Makes It Different

The RU-MX5ML brings together five mixing channels, a direct MIX input, and selectable mic/line operation on four inputs. This configuration offers more routing flexibility than a fixed set of microphone-only or line-only connections. Its combination of switch-selectable phantom power, wide gain ranges, balanced dual-level outputs, detachable terminal blocks, calibrated dual-LED metering, and an integral microphone high-pass filter provides a defined set of controls and connection options for mixed-source audio systems.

Final Assessment

The RDL RU-MX5ML is a compact choice for combining four selectable mic/line sources, one dedicated line source, and a direct mix feed. Its balanced signal path, 24 V phantom power, adjustable gain, low-noise specifications, 20 dB headroom, dual-LED VU meter, and detachable terminal-block connections provide the core functions required for controlled microphone and line-level mixing. Installation requires a separate compatible 24 Vdc power supply.