Atlas TSD-ML22VCA Owner's Manual
Atlas TSD-ML22VCA is a 2 input, 2 output true VCA with enhanced features including a high quality microphone pre amplifier. It can be used as a Mic Preamp, Line Preamp, Line Drive, or Remote System Controller in various audio applications, such as churches, restaurants, sports bars, schools, industrial facilities, and houses of worship.
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Owner’s Manual
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Owner’s Manual
Description
The Atlas Sound TSD-ML22VCA is a 2 input, 2 output true VCA with enhanced features including a high quality microphone pre amplifier. VCA’s inserted prior to amplification provides a far more efficient solution than transformer-based attenuators for volume adjustment in high power music applications. The dual channel design can provide level control for two separate discrete zones or stereo sources and is perfect for use in sports bars, restaurants, hotels or other installations.
The TSD-ML22VCA also provides two high quality, low noise mic pre-amps, which allows simplification of designs that require remote microphone level adjustment. Switchable phantom power is provided for powering condenser microphones and a 12dB/octave @ 125Hz high pass filter is available on each mic input to minimize bass rumble and low frequency feedback in the system ensuring focus and clarity for the voice spectrum.
The TSD-ML22VCA is part of a full line of Atlas Sound Time Saving Devices. These compact (1.5" x 4" 2.75") units are designed to solve some of the common audio system problems in the easiest and in the most efficient and cost-effective way. All models are made from high quality components and include removable individual I/O connectors for quick and precise wiring, separate ground terminals for all
I/Os assuring secured connections, and removable level controls that can be replaced with tamper-proof security covers. The TSDs are highly efficient and meet Energy Star™ standards as one
24V DC power supply (available separately) can power multiple Atlas Time Saving Devices.
Features
• Two (2) Selectable Balanced Mic or Line
Inputs
• High Gain Mic Input 50dB
• 12dB/Oct @ 125Hz Low Cut Filter Per Input
• Phantom Power Per Input
• Two (2) Balanced Mic/Line Outputs
• Separate Channel VCAs for Remote Level
Control via Wall Plate or Programmable
DC
• Input Peak Indicator Per Channel
• Input Signal Indicator Per Channel
• High Gain Output for Long Distance
Applications
• Cable Management System
• Multiple Mounting Configurations
• Separate Ground Connections
• Removable Phoenix Style I/O Connectors
• Security Covers Included for All Front
Controls
• Meets Energy Star™ Standards
• Compact Chassis Design
Audio Applications
• Mic Preamp
• Line Preamp
• Line Drive
• Choirs
• Remote System Controller
Installation
• Churches
• Restaurants
• Sports Bars
• Schools
• Industrial Facilities
• House of Worship
AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 2 –
Specifications are subject to change without notice.
Owner’s Manual
Front Panel Description
6
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
6
6
4
5
3
6
1 2
1. Input 1-2 Level Controls - Adjusts the gain of the independent input signals. Turn clockwise to
increase the signal level and counter-clockwise to decrease it. Note: The Input Level Control
knobs can be removed and replaced with a supplied security cover to prevent unauthorized
adjustment.
2. Output 1-2 Level Conrols - Adjusts the gain of the independent output signals. Turn clockwise to
increase the signal level and counter-clockwise to decrease it. Note: The Output Level Control
knobs can be removed and replaced with a supplied security cover to prevent unauthorized
adjustment.
3. Power LED - Illuminates Blue when 24VDC is present.
4. Input Peak LEDs - Illuminates Red when the input signal reaches 3dBV below when signal clipping
will occur. Occasional flashing is normal but if this indicator is continuously On, then reduce the
input level using the output level controls on the front panel. There is an LED for each input
channel.
5. Signal LEDs - Illuminates Green when the input signal strength reaches 25mV to verify a signal
path. There is an LED for each input channel. Note: The LED will not illuminate if the output Level is
turned Off.
6. Bracket Retainer Points - Each TSD includes two mounting brackets for securing the TSD to a
cabinet or wall. Remove screws and align the bracket with the panel hole before firmly tightening
the screws.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Rear Panel Description
5
Owner’s Manual
5
5 5
1 2 3
TSD Input/Output connections are removable for easy system wiring. The connector has a 3.5mm pitch between pins.
1. DC Power Input - Each TSD that requires DC power comes with a 2 position connector for
an external 24VDC power supply (sold separately). Because of the TSD’s low power consumption,
a single external power supply may power more than one TSD. Please refer to the specifications
on current requirements in milliamps to match with the appropriate power supply. Note: It is
acceptable to exceed the current requirements of the TSDs but NOT safe to use a power supply
that is below the current requirement of the device.
2. Balanced Mic/Line Input 1-2 - Connects to balanced line or mic level sources. Your connection
must be mated properly to the input connector or signal loss and/or noise may occur. For gain or
source input type selection, refer to the “Dip Switch Function Identification” chart for proper
input setting. Note: Unbalanced line level inputs can be inserted with proper wire configuration by
connecting the (G) and (-) terminals together.
3. Balanced Mic/Line Output 1-2 - Provides output when an input signal is present for connection
to balanced mic or line level devices. Your output connections must be connected properly to
the connectors or loss and/or noise may be introduced into the signal. For gain or source input
type selection, refer to the “Dip Switch Function Identification” chart for proper output setting.
Note: Unbalanced line level devices can be used with proper wire configuration by connecting the
(G) and (-) terminals together.
4. VCA - Remotely control the audio levels via VCA technology. Connect one side of a 10K linear taper
pot to the terminal marked DC10V, the other side of the pot to the (G) terminal, and the wiper to the
Control 1 terminal. Set the switch to the correct channel terminal. Control 1 will adjust input
channel 1 and Control 2 will adjust input channel 2.
5. Cable Management Retainer Points - Each TSD includes two cable retainer straps for securing
the included cable management retainers. Remove one of the rear panel screws, align the
panel hole with a retainer and firmly tighten the screws.
AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 4 –
Specifications are subject to change without notice.
Owner’s Manual
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Dip Switch Function Identification
SWITCH FUNCTIONS
Switch Position
• DIP SW # 1 - 24VDC Phantom Power applies power for condenser mic operation. Down
position is On.
• DIP SW # 2 - Input Mic or Line Select for input gain selection. Up position is Line, down position
is Microphone.
• DIP SW # 3 - Low Cut Filter engages at 125Hz with a roll off rate of 12dB per octave. This filter
operates either in the Line or Mic mode and is available on each input. Ideal for vocal
microphones to reduce low frequency energy and to increase intelligibility. Down position is On.
• DIP SW # 4 - Output Mic or Line Select for ouput gain selection. Up position is Line, down
position is Microphone.
Knob and Security Cover
All front panel level controls feature a removable knob that can be replaced with an included security cover. Follow these steps to prevent potentiometer damage or unwanted changes.
1. Knob Installation - Turn the potentiometer shaft fully counter-clockwise. Align the knob indicator
to the lowest setting on the panel and the potentiometer shaft slot. Carefully press the knob onto
the potentiometer shaft. Do not force or damage may occur to the potentiometer.
2. Security Cover Installation – Remove the knob from the panel and insert the cover. Do not force or
damage may occur to the potentiometer. Small pliers may be required to remove the knobs.
Mounting
There are three ways to securely mount this TSD:
1. Velcro™ - Each unit includes industrial grade Velcro™ with adhesive backing to adhere to any
flat surface.
2. Brackets - Each unit includes two mounting brackets to secure to a cabinet or wall.
3. Rack Mount Panel - The optional TSD-RMK rack mount panel supports up to four TSDs in a
1RU space.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Block Diagram
1
INPUT 1 FUNCTION SET
PHANTOM
2
INPUT
3
MIC
LOW CUT
4
OUTPUT
OFF LINE OFF LINE
ON MIC ON MIC
1 2 3 4
MIC/LINE
MIC/LINE
INPUT 1
+
G
INPUT 1
LEVEL
LOW CUT
125Hz -12dB
PEAK
1
INPUT 2 FUNCTION SET
PHANTOM
OFF
2
INPUT
LINE
3
MIC
LOW CUT
OFF
4
OUTPUT
LINE
ON MIC ON MIC
1 2 3 4
SIGNAL
VCA
MIC/LINE
OUTPUT 1
LEVEL
Owner’s Manual
+
–
G
CHANNEL 1
OUTPUT
FROM VCA CTRL 10V DC
DC 10V OUT (20mA MAX)
CHANNEL 1 VCA CTRL
CHANNEL 2 VCA CTRL
GND
MIC/LINE
INPUT 2
+
–
G
LOW CUT
125Hz -12dB
INPUT 2
LEVEL
PEAK
VCA
MINI
PHOENIX
+
–
G
CHANNEL 2
OUTPUT
SIGNAL
OUTPUT 2
LEVEL
20 V TO PREAMP
10 V TO VCA CTRL
POSITIVE REGULATORS
FILTER, ANTI-JAMMING
DC 24V
Specifications
Description
Chassis Color
Chassis Material
2 x 2 Mic/Line Preamp with VCA Control
Black
Aluminum
Inputs
Type
Connection
Qty 2, Balanced Mic or Line Selectable
Removable 3 Position Captive Screw 3.5mm Spacing
Impedance 1.2KΩ Balanced, 600Ω Unbalanced
Phantom
Low Cut Filter
Line Input Level
Mic Input Level
24VDC Defeatable
125Hz/12dB Defeatable
1V (0dBV) Balanced = 2V (+6dBV) Balanced Output,
Maximum Input 6V (+15dBV)
46dB Gain, 10mV (-40dB) Balanced = 2V (+6dBV) Balanced Output,
Maximum Input 40mV (-27dBV)
AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 6 –
Specifications are subject to change without notice.
Owner’s Manual
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Outputs
Type
Connection
Impedance 300Ω Balanced, 150Ω Unbalanced
Line Output Level
Mic Output Level
Qty 2, Balanced Mic or Line Selectable
Removable 3 Position Captive Screw 3.5mm Spacing
1V (0dBV) In = 2V (+6dBV), Maximum Output 6V (15dBV)
10mV (-40dBV) In = 80mV (-21dBV),
Maximum Output 300mV (-10dBV)
Controls
Input Level Control
Output Level Control
VCA Control Port
Dip Switch Function
Qty 2, Removable Knobs with Security Covers
Qty 2, Removable Knobs with Security Covers
Channel 1 & 2, +10VDC Return Design,
Removable 4 Position Captive Screw 3.5mm Spacing
• Qty 2, Phantom Power 24VDC
• Qty 2, Input Mic/Line Select
• Qty 2, Input 125Hz/12dB High Pass Filter
• Qty 2, Output Mic/Line Select
Indicators
Input Signal
Input Peak
Green, 25mV On Threshold, Qty 2
Red, -3dB Before Clip, Qty 2
Power Blue
Electrical
Frequency Response
THD
Signal to Noise
Mounting
Velcro™
Brackets
TSD-RMK
Cable Retainer
20Hz - 20kHz (±1dB)
.06% & 1kHz
Line to Line: 85dBV
Mic to Line: 70dBV
Line to Mic: 55dBV
Mic to Mic: 55dBV
Industrial Grade, Included
Qty 2, Included
Optional 1 RU Rack Mount Panel (Supports 4 TSD Units)
Qty 2, Included
Power Requirements
Voltage 24VDC
Power Consumption
Power Consumption
70mA
1.68W
Dimensions
Weight
H 1.5" (39mm) x W 4" (101mm) x D 2.75" (70mm)
6oz, .165kg
Accessories
TSD 24VDC Power Supplies
TSD-RMK 1 RU Rack Panel
Safety and Certifications
External Power Supply cUL, CE, RoHS, TUV
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
TSD-ML22VCA
2x2 Mic/Line Preamp & VCA
Owner’s Manual
Limited Warranty
All products manufactured by Atlas Sound are warranted to the original dealer/installer, industrial or commercial purchaser to be free from defects in material and workmanship and to be in compliance with our published specifications, if any. This warranty shall extend from the date of purchase for a period of three years on all Atlas Sound products, including SOUNDOLIER brand, and ATLAS
SOUND brand products except as follows: one year on electronics and control systems; one year on replacement parts; and one year on Musician Series stands and related accessories. Additionally, fuses and lamps carry no warranty. Atlas Sound will solely at its discretion, replace at no charge or repair free of charge defective parts or products when the product has been applied and used in accordance with our published operation and installation instructions. We will not be responsible for defects caused by improper storage, misuse (including failure to provide reasonable and necessary maintenance), accident, abnormal atmospheres, water immersion, lightning discharge, or malfunctions when products have been modified or operated in excess of rated power, altered, serviced or installed in other than a workman like manner. The original sales invoice should be retained as evidence of purchase under the terms of this warranty. All warranty returns must comply with our returns policy set forth below. When products returned to Atlas Sound do not qualify for repair or replacement under our warranty, repairs may be performed at prevailing costs for material and labor unless there is included with the returned product(s) a written request for an estimate of repair costs before any nonwarranty work is performed. In the event of replacement or upon completion of repairs, return shipment will be made with the transportation charges collect.
EXCEPT TO THE EXTENT THAT APPLICABLE LAW PREVENTS THE LIMITATION OF CONSEQUENTIAL
DAMAGES FOR PERSONAL INJURY, ATLAS SOUND SHALL NOT BE LIABLE IN TORT OR CONTRACT
FOR ANY DIRECT, CONSEQUENTIAL OR INCIDENTAL LOSS OR DAMAGE ARISING OUT OF THE
INSTALLATION, USE OR INABILITY TO USE THE PRODUCTS. THE ABOVE WARRANTY IS IN LIEU OF
ALL OTHER WARRANTIES INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE.
Atlas Sound does not assume, or does it authorize any other person to assume or extend on its behalf, any other warranty, obligation, or liability. This warranty gives you specific legal rights and you may have other rights which vary from state to state.
Service
Should your Atlas TSD require service, please contact the Atlas Sound warranty department at 1-877-689-8055, ext. 1274 to obtain an RA number.
Atlas Sound Tech Support can be reached at 1-800-876-3333.
Visit our website at www.AtlasSound.com to see other Atlas products
©2010 Atlas Sound L.P. All rights reserved. Atlas Sound is a trademark of Atlas Sound L.P.
All other trademarks are the property of their respective owners. ATS003944 RevA 9/10
AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 8 –
Specifications are subject to change without notice.

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