The AtlasIED TSD-ML22VCA is a versatile 2-input, 2-output mic/line preamp and true VCA (Voltage Controlled Amplifier) designed for professional audio installations that require efficient and precise remote volume control. Unlike transformer-based attenuators, the TSD-ML22VCA provides smooth, accurate level adjustment with no signal degradation — ideal for restaurants, sports bars, hotels, and multi-zone venues.
This dual-channel unit enables level control for two discrete zones or stereo sources, offering exceptional flexibility for both background music and paging applications. Each input features a high-quality, low-noise microphone preamp with switchable 24V phantom power to accommodate condenser microphones, ensuring crystal-clear, reliable sound.
To maintain intelligibility and focus in voice applications, each channel includes a 12dB/octave high-pass filter at 125Hz to reduce bass rumble and low-frequency feedback. The high-gain balanced outputs can drive long cable runs with minimal noise, making the TSD-ML22VCA a powerful yet compact solution for commercial and professional audio systems.
The unit operates on any compatible AtlasIED TSD power supply (sold separately) and draws 70mA. For installations using multiple TSD devices, the AtlasIED TSD Power Calculator can help determine the appropriate power supply size.
2 x 2 Mic/Line Preamp and VCA Key Features:
-
True VCA (Voltage Controlled Amplifier) for remote volume control
-
Two (2) Mic/Line Inputs for flexible routing
-
High-Quality Microphone Preamps with low-noise performance
-
Switchable 24V Phantom Power for condenser microphones
-
12dB/Octave Low-Cut Filter @ 125Hz per input
-
Dual Outputs for independent zone or stereo operation
-
Signal & Peak Indicator LEDs for precise monitoring
-
High-Gain Balanced Outputs for long cable runs
-
All I/O via Removable Phoenix-Style Connectors
-
Separate Ground Connections for system stability
-
Security Covers for front panel control protection
-
Energy-Efficient Design
-
Power Supply Sold Separately
AtlasIED TSD-ML22VCA Specifications
|
INPUT IMPEDANCE
|
1.2KΩ Balanced, 600Ω Unbalanced
|
|
PHANTOM POWER
|
24VDC Defeatable
|
|
LOW CUT FILTER
|
125Hz/12dB Defeatable
|
|
LINE INPUT LEVEL
|
1V (0dBV) Balanced 2V (+6dBV) Balanced Output
|
|
MIC INPUT LEVEL
|
46dB Gain 10mV (-40dBV) Balanced
|
|
OUTPUT IMPEDANCE
|
300Ω Balanced, 150Ω Unbalanced
|
|
LINE OUTPUT LEVEL
|
1V (0dBV) In
|
|
FREQUENCY RESPONSE
|
20Hz - 20kHz
|
|
SIGNAL TO NOISE RATIO LINE TO LINE
|
85dBV
|
|
SIGNAL TO NOISE RATIO LINE TO MIC
|
55dBV
|
|
24VDC POWER REQUIREMENTS
|
70mA
|
|
HEIGHT
|
1.5" (3.81 cm)
|
|
WIDTH
|
4" (10.16 cm)
|
|
DEPTH
|
2.5" (6.35 cm)
|
|
WEIGHT
|
6oz., .165kg
|
|
VOLTAGE COMPATIBILITY
|
24V
|
