STM-DA3 Mic Level Distribution Amplifier - 1x3
STM-DA3 Mic Level Distribution Amplifier - 1x3 | | - Feed 1 Microphone to 3 Microphone Inputs
- Electrical and Audio Isolation
- Studio Quality Low‑Noise, Low‑Distortion Performance
- Excellent Phase Response
- Versatility of STICK‑ON® Compactness
| The STM‑DA3 is designed for use in quality commercial sound, broadcast and recording applications. The 1.2 kΩ balanced input accepts a wide variety of microphone input levels without loading professional low impedance microphones. A multi‑turn trimmer is user adjustable for either gain or loss in order to match the facility standard microphone levels. Three balanced outputs provide nearly total isolation between the output lines. Unlike mic‑splitting transformer systems, the STM‑DA3 also provides audio isolation. In fact, the audio isolation is so good that a +4 dBu signal fed into one output is still below the noise floor on the adjacent output. Loading of one output including a direct short, has no effect on the other outputs. The STM‑DA3 is built on the electrical architecture of RDL's low‑noise studio quality mic preamplifiers. Dynamic or condenser microphones may be used with the STM‑DA3. Standard 24 V phantom is supplied to the input when the supply voltage is connected to the PHM terminal. Optimum operating level is set using RDL's unique Dual‑LED VU meter, located adjacent to the terminal block. A green LED illuminates at 15 dB below optimum level. The intensity of the green LED progresses from minimum to full intensity over a 15 dB range. The adjacent red LED illuminates when the operating level exceeds the optimum level. This makes the STM‑DA3 easy to set up without any external test equipment, and operating levels may be monitored at the module For Mic to Line level distribution, use the RDL STM‑LDA3. | Typical Performance: | Input: | | 1.2 kΩ balanced | Outputs (3): | | ‑45 dBu, 150 Ω balanced | Gain Range: | | 17 dB (Adjustable, 25‑turn trimmer) | Control Fully CCW: | | Gain = ‑5 dB | Control Fully CW: | | Gain = 12 dB | Frequency Response: | | 30 Hz to 20 kHz (+/‑ 0.2 dB) | IMD: | | < 0.1% | Noise: | | < 80 dB (below ‑50 dBu output, ‑50 dBu input) | Headroom: | | > 20 dB (‑50 dBu output, ‑45 dBu input) | CMRR: | | > 60 dB (100 Hz to 5 kHz) | Output Isolation: | | > 135 dB (balanced audio)
> 150 dB (common mode) | Power Requirement: | | GROUND‑REFERENCED, 24 to 33 Vdc @ 40 mA |
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 MB-1
Mounting Kit - RU, ST and TX Series
|  MB-3
Kit to Mount ST, TX Series Modules on FP Panel
|  MSR-1
Snap Rail Adapter - STICK-ON Series
|  RC-1U
Universal Rack Chassis - RU, ST and TX Series
|  RU-RA3A
Rack Mount for 3 RACK-UP Series Products
|  SMK-12
STICK-ON Mounting Kit
|  SR-10
STICK-ON Series Mounting Rack - 10 Modules
|  SR-12A
STICK-ON Series Mounting Rack - 12 Modules
|  SR-4
STICK-ON Series Mounting Rack - 7 Modules max.
|  STR-19A
STICK-ON Series Racking System - 12 Modules
|  STR-19B
STICK-ON Series Racking System - 10 Modules
|  UC-1
Single Wide Enclosure - RACK-UP Mounts
|  UC-2
Double Wide Enclosure - RACK-UP Mounts
|  WDG1
Table Top Chassis for RU, ST and TX Series
|  DRA-35S
STICK-ON DIN Rail Adapter
|  DRA-35S6
Stick-On DIN Rail Adapter
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 DTB
STICK-ON® Series Detachable Terminal Block
|  AMS
Accessory Mounting System
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RU-MLD4
Mic / Line Distribution Amplifier | STM-LDA3
Studio Quality Mic Preamp w/ phantom |
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Copyright © 2008 Radio Design Labs, Inc. RDL, Radio Design Labs, the RDL logo, STICK-ON, RACK-UP and the Rack-Up logo are registered trademarks of Radio Design Labs, Inc. Flat-Pak, RCX, SourceFlex, SupplyFlex, Sure-Lok, TX, ULTRASTYLE, and Specialists in Practical Precision Engineering are trademarks of Radio Design Labs, Inc. All other trademarks are the property of their respective owners. Typical Performance reflects product at publication time exclusive of EMC data, if any, supplied with product. Date last modified: June 20 2008
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