4x2 Mic/Line Mixer with Priority Sense and Remote Control

Ideal Use Cases

The AtlasIED TSD-MIX42RT is a four-input, two-output mic/line mixer developed for applications that require paging, priority music override, or remote input selection with level control. Its input and output arrangement supports systems that need several microphone or line-level sources routed through two outputs. Priority sense and remote-control capabilities make the mixer particularly relevant when an installation must accommodate both routine program audio and higher-priority paging signals.

Why Choose This Model

This model combines mic/line mixing, priority operation, and remote source control in one compact unit. It supports balanced and unbalanced audio configurations, with an input impedance of 1.2 kΩ balanced or 600 Ω unbalanced and an output impedance of 300 Ω balanced or 150 Ω unbalanced. Defeatable 24VDC phantom power accommodates microphones that require phantom power while allowing the feature to be disabled when it is not needed. A defeatable 125 Hz, 12 dB low-cut filter provides another configurable option for managing incoming audio.

Installation and Integration

The TSD-MIX42RT measures 4 inches wide, 1.5 inches high, and 5.2 inches deep, equivalent to 10.16 x 3.81 x 13.2 cm. It weighs 13 ounces, or approximately 0.3 kg. These dimensions allow the mixer to be incorporated where available equipment space is limited. The unit operates from 24VDC and has a specified current requirement and power consumption of 60 mA.

For signal matching, the specified microphone input level is 10 mV (-40 dBV) balanced with 46 dB of gain. The line input specification is 1V (0 dBV) balanced, with the supplied technical data also identifying a 2V (+6 dBV) balanced output. Reviewing these levels together with the balanced and unbalanced impedance values helps define how the mixer fits into the surrounding audio system. Remote input selection and level control can be incorporated where those functions are required.

Performance Highlights

The mixer covers a frequency response of 20 Hz to 20 kHz within +/-1 dB. Total harmonic distortion is specified at 0.06% at 1 kHz. The signal-to-noise ratio is rated at 85 dBV for line-to-line operation and 78 dBV for mic-to-line operation. These published values provide concrete reference points for evaluating the unit within microphone, line-level, paging, and music-signal paths.

The electrical specifications address both microphone and line sources rather than limiting the unit to one input type. Balanced operation is supported across the stated input and output specifications, while unbalanced impedance values are also provided. The combination of mic gain, line-level handling, selectable phantom power, and a selectable low-cut filter gives installers several documented parameters for adapting the mixer to the connected sources.

What Makes It Different

The defining feature set is the combination of four-input, two-output mixing with priority sense and remote control. The mixer is not limited to basic source combining: it is specifically identified for paging, priority music override, and remote input selection with level adjustment. This makes its purpose distinct in systems where source priority and remote operation are part of the required signal workflow. The defeatable phantom-power and low-cut-filter functions further allow key microphone-related features to be enabled only when the installation calls for them.

Final Assessment

The AtlasIED TSD-MIX42RT is a focused mic/line mixing solution for installations requiring four inputs, two outputs, paging support, priority music override, or remote source selection and level control. Its documented 20 Hz to 20 kHz response, balanced and unbalanced impedance specifications, 24VDC operation, and compact enclosure provide the essential information needed for system planning. The product is covered by a 36-month warranty from the date of purchase.