Atlas Sound TSD-ML22VCA – 2x2 Mic/Line Preamp and VCA Module
Atlas Sound TSD-ML22VCA – 2x2 Mic/Line Preamp and VCA Module is backordered and will ship as soon as it is back in stock.
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Atlas Sound TSD-ML22VCA – 2x2 Mic/Line Preamp and VCA Module
Product Overview
The Atlas Sound TSD-ML22VCA is a 2-input by 2-output true VCA (Voltage Controlled Amplifier) with integrated high-quality microphone preamplifiers, designed for remote volume control and microphone-level management in commercial audio systems. This commercial mic preamp and VCA module is ideal for installations in sports bars, restaurants, hotels, and multi-zone audio systems where remote microphone input management and discrete zone level control are required without a full DSP processor. Long-tail applications include remote VCA volume control for commercial distributed audio zones, microphone preamp with phantom power for commercial AV installations, and 2-channel audio level control for restaurant or bar background music zones.
Product Description
The TSD-ML22VCA provides two independent mic/line input channels, each feeding a true VCA for smooth, accurate remote volume control. Unlike transformer-based attenuators, VCA-based level control is more efficient for high-power music applications and produces lower distortion at all gain settings. The dual-channel design supports two discrete zones or a stereo source, making it appropriate for restaurants, sports bars, hotels, and similar commercial deployments. Each mic input has a high-quality, low-noise preamp with switchable 24VDC phantom power for condenser microphones. A defeatable 12dB/octave high-pass filter at 125Hz is available per mic input to reduce bass rumble and low-frequency feedback, maintaining speech clarity in paging and announcement contexts. All I/O connections use removable phoenix-style connectors. High-gain output drivers handle long balanced line runs to remote amplifiers or processors. Signal presence and peak LEDs per channel enable fast diagnostics. Security covers on all front-panel controls prevent unauthorized adjustments after commissioning. The unit operates on a 24VDC power supply (sold separately) at 70mA draw, allowing multiple TSD devices to share a single supply. Physical dimensions: 1.5" H x 4" W x 2.5" D; 6 oz. CE marked; 36-month warranty.
Key Features
- True VCA Level Control — Voltage-controlled amplifier provides efficient, low-distortion volume adjustment for mic and line sources compared to transformer-based attenuators.
- 2 High-Quality Microphone Preamps — Low-noise mic preamps with 46 dB gain support condenser and dynamic microphones.
- Switchable 24VDC Phantom Power — Per-channel defeatable phantom power for condenser microphone operation.
- 12dB/Oct High-Pass Filter @ 125Hz — Defeatable low-cut filter per mic input minimizes bass rumble and reduces low-frequency feedback risk.
- 2 Independent Output Channels — Controls two discrete zones or a stereo source independently.
- High-Gain Balanced Outputs — Designed to drive long balanced cable runs to remote amplifiers or processors without level degradation.
- Signal & Peak Indicator LEDs — Per-channel LEDs provide immediate signal presence and overload indication.
- Removable Phoenix-Style Connectors — All I/O uses removable phoenix connectors for professional field termination.
- Security Covers on Controls — Protects front-panel adjustments from unauthorized changes after installation.
- Energy Efficient — 70mA at 24VDC; multiple units can share a single TSD power supply.
Typical Applications
- Boardroom
- Conference room
- Commercial meeting space
- House of worship
- Multi-purpose room
- Training room
- All-hands room
- Broadcast studio
Technical Specifications
| Specification | Value |
|---|---|
| Configuration | 2 inputs x 2 outputs |
| Input Impedance | 1.2KΩ balanced, 600Ω unbalanced |
| Output Impedance | 300Ω balanced, 150Ω unbalanced |
| Phantom Power | 24VDC (defeatable) |
| Mic Gain | 46 dB (10mV / -40dBV balanced input) |
| Line Input Level | 1V (0dBV) balanced |
| Line Output Level | 2V (+6dBV) balanced |
| Low-Cut Filter | 125Hz, 12dB/oct (defeatable) |
| Frequency Response | 20Hz – 20kHz |
| S/N Ratio (Line-to-Line) | 85 dBV |
| S/N Ratio (Line-to-Mic) | 55 dBV |
| Power Requirement | 24VDC, 70mA (power supply sold separately) |
| Height | 1.5" (3.81 cm) |
| Width | 4" (10.16 cm) |
| Depth | 2.5" (6.35 cm) |
| Weight | 6 oz. (0.165 kg) |
| Certifications | CE |
| Warranty | 36 months from date of purchase |
Frequently Asked Questions
Q: Does the TSD-ML22VCA include a power supply?
A: No. The TSD-ML22VCA requires a 24VDC power supply sold separately. It draws 70mA and can share a power supply with other TSD series devices. Use the AtlasIED TSD Power Calculator to specify the correct supply for multi-unit installations.
Q: What is a VCA and why is it preferred over transformer-based attenuators?
A: A VCA (Voltage Controlled Amplifier) adjusts audio levels electronically with low distortion across the full gain range, which is more efficient and accurate than transformer-based attenuators, particularly in high-power music playback applications.
Q: Does the phantom power work with all condenser microphones?
A: The TSD-ML22VCA provides 24VDC phantom power. Most professional condenser microphones require 48VDC phantom power. Verify your microphone’s phantom power requirements before use. Some condenser mics operate on 24V; check the microphone’s datasheet.
Q: Can the two channels be used for separate zones?
A: Yes. The two channels are independent and can control two discrete audio zones or a stereo source independently.
Q: What connectors are used?
A: All I/O connections use removable phoenix-style connectors for professional installation and easy field reconfiguration.
Q: Can the high-pass filter be bypassed?
A: Yes. The 125Hz low-cut filter is defeatable on each mic input channel individually.
Q: What is the warranty on the TSD-ML22VCA?
A: AtlasIED provides a 36-month warranty from the date of purchase.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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