Gated Speech Preamplifier - Microphone to Line

  • Gated Mic to Line Preamplifier
  • Speech Activated Gating
  • Fast, Silent Audio Switching
  • Integral Single-Ended Noise Reduction
  • Adjustable Gain and Threshold
  • Balanced or Unbalanced Input / Output
  • Phantom Power Provision
  • Open-Collector Logic Output
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The ST-GSP1 is a gated speech preamplifier designed to be used in a variety of situations where it is desired to produce an automatically switched line-level signal from a microphone. This module may be used in conjunction with other RDL modules to configure automatic mixing systems or may be used alone as a voice-operated module. The open-collector slave output may be used to trigger other equipment or RDL modules. The versatility of ST-GSP1 applications range from complete automatic mixing system design to the addition of automatic mic gating to the inputs of conventional mixers or amplifiers.

    The MIC INPUT may be wired for balanced or unbalanced operation. A phantom voltage terminal is provided for use with condenser microphones. The phantom input accepts dc voltages up to 48 Vdc and is internally filtered. The mic input gain adjustment has sufficient range to accommodate a wide range of microphones, from low-output dynamic microphones to higher-output condensers.


    Input Impedance:500 Ω balanced, 5 kΩ unbalanced
    Switching Time:10 ms
    Off Delay:2 seconds nominal (may be extended using external capacitor)
    Control Output:Open-Collector @ 50 mA
    Headroom:> 18 dB (above +4 dBu)
    THD+N: 45 dB
    Frequency Response:15 Hz to 20 kHz (± 0.5 dB into 10 kΩ bridging input)
    Residual Noise:< -80 dB below +4 dBu unweighted (preamp muted)
    ON Gain:45 to 65 dB (Adjustable)
    Audio Outputs (1):+4 dBu nominal, 150 Ω balanced, terminal block
    Ambient Operating Environment:0° C to 55° C
    Power Requirement:GROUND-REFERENCED, 24 Vdc @ 75 mA
    Package Type:Cardboard Box
    Package Dimensions:2 x 2 x 4 in.
    Shipping Weight:0.2 lbs.
    WEEE weight:0.145 lbs.
    Tariff code:8543.70.9860

    Related Products

    • ST-GLA1

      Gated Line Amplifier - Noise Gate

    Power Amplifiers
    • ST-MA2

      2 W Mono Audio Amplifier with Muting - 8 Ω

    Related Products

    General Wiring Accessories
    • DTB

      STICK-ON® Series Detachable Terminal Block

    General Mounting Accessories
    • DMK-5

      Detachable Mounting Kit for RDL Modules

    • SR-4

      STICK-ON Series Mounting Rack - 7 modules

    • MB-1

      Mounting Kit - RU, ST and TX Series

    TX™ Mounting Accessories
    • MB-1

      Mounting Kit - RU, ST and TX Series

    DIN Rail Mounting Accessories
    • DRA-35S

      STICK-ON DIN Rail Adapter - 1 module

    • DRA-35S6

      STICK-ON DIN Rail Adapter - 6 modules

    STICK-ON® Mounting Accessories
    • STR-H6A

      10.4" Rack Mount for 6 STICK-ON Series Products

    • ST-PBR4

      STICK-ON Mounting Bracket

    • ST-RRB1

      Rear rack rail mounting kit for any STICK-ON module

    • SMK-12

      STICK-ON Mounting Plate

    • STR-19A

      STICK-ON Series 19" Racking System - 12 modules

    • SR-12A

      STICK-ON Series 19" Mounting Rack - 12 modules

    • STR-19B

      STICK-ON Series 19" Racking System - 10 modules

    • SR-10

      STICK-ON Series 19" Mounting Rack - 10 modules




    CAD FilesUnitsSizeFormat
    Engineering Functional BlockAmerican4.05 KBDXF
    Panel Diagram - EndAmerican11.4 KBDXF
    Panel Diagram - FrontAmerican63.65 KBDXF
    Panel Diagram - EndMetric11.56 KBDXF
    Panel Diagram - FrontMetric65.31 KBDXF
    High Res ImagesFormat
    Declaration of Conformity


    How To Buy

    Direct Dealer Program

    Becoming an RDL direct dealer is quick and easy. To become a direct dealer, your company must meet the following requirements:

    • Must be an A/V contractor, sound contractor or system integrator
    • Must possess a current resale certificate for your state
    Click here to submit a new direct dealer account inquiry

    Buy Online