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STM-1 Microphone Preamplifier - 50 dB Gain

STM-1 Microphone Preamplifier - 50 dB Gain

Radio Design Labs - Microphone Preamplifier - 50 dB Gain



  • High or Low Impedance Input Mic Preamp
  • Fixed 50 dB Gain for Consistency
  • Balanced or Unbalanced Output
  • Phantom Capability
  • RF‑Filtered Inputs and Outputs
  • Excellent Performance
  • STICK‑ON® Convenience

The STM‑1 is a low‑cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used. The high‑performance circuit provides a fixed 50 dB gain to bring any mic‑level signal up to the line‑level range of nearly any line input. The STM‑1 supply input is single ended and operates from 24 to 33 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. For intercom applications, the input will operate directly from a speaker.

Typical Performance:

Input:

500 Ω balanced; 5 kΩ unbalanced

Phantom:

24Vdc; IEC 1938: 1996‑12, Filtered

Outputs (2):

+4 dBu 150 Ω balanced; ‑10dBv unbalanced

Frequency Response:

50 Hz to 20 kHz (+/‑ 1.5 dB)

Gain:

50 dB nominal

THD+N:

< 0.05%

CMRR:

> 60 dB (50 Hz to 30 kHz)

Residual Noise:

< ‑70 dB (below +4 dBu; 150 Ω source @ 50 dB gain)

Headroom:

> 20 dB (24 Vdc supply);
> 14 dB (12 Vdc supply)

Phantom Power Input:

24 to 33 Vdc @ 10 mA maximum

Power Requirement:

GROUND‑REFERENCED, 24 to 33 Vdc @ 25 mA

Ambient Operating Environment:

0° C to 55° C


High Low Impedance Input Mic Preamp, Fixed 50 dB Gain for Consistency, Balanced Unbalanced Output, Phantom Capability, RF-Filtered Inputs Outputs, Excellent Performance, STICK-ON® Convenience, The STM-1 low-cost quality microphone preamplifier designed use in commercial sound broadcast applications compact size makes it ideal where larger heavier preamp cannot used high-performance circuit provides fixed 50 dB gain to bring any mic-level signal up to line-level range of nearly any line input STM-1 supply input single ended operates from 24 to 33 Vdc Operation from 12 Vdc possible 6 dB reduction in headroom intercom applications, input will operate directly from speaker, format converter Data/Installation

Mounting Accessories:

Mounting Kit - RU, ST and TX SeriesMB-1
Mounting Kit - RU, ST and TX Series

Kit to Mount ST, TX Series Modules on FP PanelMB-3
Kit to Mount ST, TX Series Modules on FP Panel

Snap Rail Adapter - STICK-ON SeriesMSR-1
Snap Rail Adapter - STICK-ON Series

19" Universal Rack Chassis - RU, ST and TX SeriesRC-1U
19" Universal Rack Chassis - RU, ST and TX Series

19" Rack Mount for 3 RACK-UP Series ProductsRU-RA3A
19" Rack Mount for 3 RACK-UP Series Products

STICK-ON Mounting PlateSMK-12
STICK-ON Mounting Plate

STICK-ON Series 19" Mounting Rack - 10 modulesSR-10
STICK-ON Series 19" Mounting Rack - 10 modules

STICK-ON Series 19" Mounting Rack - 12 modulesSR-12A
STICK-ON Series 19" Mounting Rack - 12 modules

STICK-ON Series Mounting Rack - 7 modulesSR-4
STICK-ON Series Mounting Rack - 7 modules

STICK-ON Series 19" Racking System - 12 modulesSTR-19A
STICK-ON Series 19" Racking System - 12 modules

STICK-ON Series 19" Racking System - 10 modulesSTR-19B
STICK-ON Series 19" Racking System - 10 modules

Single Wide Enclosure - RACK-UP MountsUC-1
Single Wide Enclosure - RACK-UP Mounts

Double Wide Enclosure - RACK-UP MountsUC-2
Double Wide Enclosure - RACK-UP Mounts

Table Top Chassis for RU, ST and TX SeriesWDG1
Table Top Chassis for RU, ST and TX Series

STICK-ON DIN Rail Adapter - 1 moduleDRA-35S
STICK-ON DIN Rail Adapter - 1 module

STICK-ON DIN Rail Adapter - 6 modulesDRA-35S6
STICK-ON DIN Rail Adapter - 6 modules

Rear rack rail mounting kit for any STICK-ON moduleST-RRB1
Rear rack rail mounting kit for any STICK-ON module

General Accessories:

STICK-ON® Series Detachable Terminal BlockDTB
STICK-ON® Series Detachable Terminal Block

Accessory Mounting SystemAMS
Accessory Mounting System

Related Products:

RU-MLA2
Dual Microphone / Line Preamplifier

FP-MPA2
Dual Microphone Phantom Adapter 12, 24, 48 V - XLR

STM-LDA3
Studio Quality Microphone Preamplifier with phantom - 3 line outputs

EZ-MPA1
Microphone Preamplifier - Stereo Output with Compressors

EZ-MPA2
Dual Microphone Preamplifier - Stereo Output with Compressors

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Copyright © 2010 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: October 26 2009

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