Atlas Sound TSD-MIX41 – 4-Input Balanced Mic/Line Mixer

Product Overview

The Atlas Sound TSD-MIX41 is a four-input balanced mic/line mixer designed for commercial audio systems requiring multiple microphone or line-level sources to be sub-mixed or summed to a single balanced output. As a 4x1 mic/line mixer for distributed audio, it serves as both a standalone mixer and a building block within larger TSD-series signal processing chains. Common deployment contexts include house of worship choir mic mixing, restaurant background music paging, conference room multi-mic summing, and school announcement systems requiring a compact 4-channel mixer with phantom power.

Product Description

The TSD-MIX41 provides four balanced mic/line inputs, each switchable between microphone and line-level operation with individually switchable 24VDC phantom power for condenser microphone support. Each input includes a high-quality, low-noise mic preamp with up to 50dB of gain, ensuring quiet signal amplification without unwanted coloration. A 12dB/octave high-pass filter at 125Hz is available on each input to attenuate bass rumble and low-frequency feedback before it reaches the summed output. Input peak and signal indicator LEDs provide visual monitoring of input levels. The balanced line output delivers a 2V (+6dBV) output level when driven by a 1V line-level input, with an output impedance of 300Ω balanced / 150Ω unbalanced, supporting long cable runs to downstream amplifiers. The unit uses removable Phoenix-style I/O connectors for clean pre-wiring and field serviceability, and security covers are included for all front panel controls to prevent unauthorized tampering. The TSD-MIX41 mounts to the TSD-RMK rack mount kit for equipment room installations and operates from a 24VDC power supply (sold separately), drawing 60mA. A single TSD power supply can power multiple TSD units simultaneously; AtlasIED provides a TSD Power Calculator to size power supplies for multi-unit systems.

Key Features

• Four Balanced Mic/Line Inputs — Each of the four inputs is independently switchable between microphone and line-level operation via rear-panel controls.
• Professional Mic Preamps with Phantom Power — Four low-noise preamps with up to 50dB of gain and individually switchable 24VDC phantom power for condenser microphone support.
• 12dB/Octave Low-Cut Filter at 125Hz — Defeatable high-pass filter on each input reduces bass rumble and low-frequency feedback common in live mic environments.
• High-Gain Balanced Output — 300Ω balanced output drives long cable runs to downstream amplifiers with a clean 2V output level.
• Input Signal and Peak LEDs — Visual indicators on each input channel aid in level setting and troubleshooting during installation and operation.
• Removable Phoenix-Style Connectors — Detachable I/O connectors allow pre-wiring before the unit is physically installed in the system.
• Security Covers Included — Front panel control covers prevent unauthorized level changes in unattended installations such as restaurants and classrooms.
• Energy Efficient 24V Operation — Draws only 60mA at 24VDC, allowing multiple TSD units to share a single power supply for cost-effective system design.

Typical Applications

• House of worship
• Conference room
• Training room
• Multi-purpose room
• Commercial meeting space
• Boardroom
• All-hands room

Technical Specifications

Frequently Asked Questions

Q: Does the TSD-MIX41 include a power supply?

A: No. The unit requires a 24VDC TSD power supply sold separately. At 60mA draw, the TSD-MIX41 can share a power supply with other TSD-series units. Use the AtlasIED TSD Power Calculator to select the correct supply.

Q: Can I use condenser microphones with the TSD-MIX41?

A: Yes. Each of the four inputs has individually switchable 24VDC phantom power, supporting standard condenser microphones without an external power source.

Q: How much gain does the mic preamp provide?

A: The mic preamp provides up to 50dB of gain (46dB nominal at 10mV input), suitable for a wide range of dynamic and condenser microphones in commercial environments.

Q: Can the TSD-MIX41 be rack-mounted?

A: Yes. The optional TSD-RMK rack mount kit accommodates TSD-series modules in a standard equipment rack.

Q: What is the signal-to-noise ratio?

A: The TSD-MIX41 achieves 85dBV SNR on line-to-line paths and 78dBV SNR on mic-to-line paths, providing clean summed output appropriate for commercial paging and distributed audio.

Q: Is the low-cut filter available on all inputs?

A: Yes. A 12dB/octave high-pass filter at 125Hz is individually available on each of the four inputs and is defeatable via front panel controls protected by security covers.