STM-2 RADIO DESIGN LABS, STM-2 Datasheet
STM-2
Manufacturer Part Number
STM-2
Description
RDL MICROPHONE PREAMPLIFIER, POWER REQUIREMENTS: 24-33 VDC, 25 MA, FEATURES: OUTPUT IS ADJUSTABLE FROM 35-65 DB GAIN. SEPARATE PHANTOM POWER SUPPLY, UP TO 48 VDC, UNIT MAY BE OPERATED WITH SUPPLY AS LOW AS 9 VDC, WITH REDUCED HEADROO
Manufacturer
RADIO DESIGN LABS
Datasheet
1.STM-2.pdf
(2 pages)
STICK-ON
Model STM-2
Mic to Line Level
Preamplifier
ANYWHERE YOU NEED...
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You Need The STM-2!
The STM-2 is part of the group of STICK-ON products from Radio Design Labs. The STM-2 is a quality
microphone preamplifier designed for use in commercial sound, broadcast, and recording applications.
The STM-2 is very flexible with gain adjustment from 0 to 65 dB, two balanced or unbalanced outputs, and
available phantom supply input! Its compact size makes it ideally suited to locations where a larger or
heavier preamp cannot be used. Its performance makes it the best choice, even when larger preamps
could be used! The single-ended supply input makes STM-2 the ideal choice for both permanent and
mobile equipment installations. Some features of the STM-2 are:
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Anywhere you need an adjustable mic to line preamplifier, STM-2 is the reliable and cost-effective
solution!
Low-Noise Mic Preamp
Adjustable Output Levels
High or Low Impedance Mic Inputs
To Convert Line Inputs to Mic Inputs
Two Balanced or Unbalanced Outputs
Separate Phantom Supply Input
RF Filtered Inputs and Outputs
Low Distortion Performance
Balanced microphone input accepts impedances from 150 to 600 Ω
Input circuitry permits connection of unbalanced microphones, or 4 or 8 Ω speakers in intercom or
monitoring applications
Variable gain (up to 65 dB) and ample headroom allow operation with any mic
Phantom supply input terminals allow connection of external power when STM-2 is used with phantom
powered microphones
Supply input is single-ended and operates from 24 Vdc to 33 Vdc (12 Vdc at reduced headroom)
Two separate outputs are provided for balanced operation
No lugs required for reliable connections
Convenience of STICK-ON package yields quick, efficient installation
Use STM-2 in conjunction with other RDL STICK-ONs to make complete audio systems
RDL
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659 N. 6
®
SERIES
th
St.
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Prescott, AZ., USA 86301
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(928) 443-9391
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FAX (928) 443-9392
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www.rdlnet.com
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STM-2 Summary of contents
Page 1
... The STM-2 is part of the group of STICK-ON products from Radio Design Labs. The STM quality microphone preamplifier designed for use in commercial sound, broadcast, and recording applications. The STM-2 is very flexible with gain adjustment from dB, two balanced or unbalanced outputs, and available phantom supply input! Its compact size makes it ideally suited to locations where a larger or heavier preamp cannot be used ...
Page 2
... POWER WIRING OPTIONAL JUMPER TO PROVIDE PHANTOM VOLTAGE TO CONDENSER MIC WHICH CAN USE VOLTS PHANTOM NOTE THE STM-2 WILL OPERATE (WITH REDUCED HEADROOM) ON SUPPLY VOLTAGES FROM 9 VDC TO 23 VDC. TYPICAL PERFORMANCE Input Impedance: Phantom Voltage and Buildout: Output Impedance: Output Levels: Frequency Response: ...