Dual Balanced/Unbalanced Line Amplifier -12 to 20 dB Gain

  • Up to 20 dB Gain in an Audio Line
  • Conversion from Balanced to Unbalanced
  • Conversion from Unbalanced to Balanced
  • Conversion from High to Low Impedance
  • Conversion from Low to High Impedance
  • Bridge an Audio Line Feed
  • Precisely Match Audio Levels
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The STA-1 is a dual-channel line-level preamplifier with bridging inputs, adjustable gain or loss, and low-impedance outputs. Each of the two identical circuits is both an electronic line transformer and a line amplifier. Hook up the STA-1 just like a pair of audio transformers with gain. True dc amplifiers produce unsurpassed audio clarity, high common-mode rejection, ultra-low distortion and low noise. The STA-1 is perfect for most line amplification, impedance or balanced/unbalanced conversion.

    The STA-1 operates from floating or bipolar dc power. For installations where ground-referenced power is preferred, use the STA-2A Dual High Gain Line Amplifiers.


    Amps per STA-1:2 identical circuits (stereo or dual mono operation)
    Gain:20 dB (adjustable, separate controls for each channel)
    Input Impedance:10 kΩ bridging
    Input Configuration:Balanced or unbalanced
    Output Impedance:200 Ω balanced (drives 600 Ω or 10 kΩ lines)
    Output Configuration:Balanced or unbalanced
    Frequency Response:dc to 25 kHz (± 0.25 dB)
    Output Level:+4 dBu
    Headroom:18 dB (at rated output of +4 dBu)
    Noise:<-75 dB (referred to +4 dBu)
    CMRR:-50 dB to (50 to 120 Hz)
    Crosstalk:Better than 75 dB
    Ambient Operating Environment:0° C to 55° C
    Power Requirement:FLOATING, 24 Vdc @ 50 mA
    Package Type:Cardboard Box
    WEEE weight:0.14 lbs.
    Shipping Weight:0.19 lbs.
    Tariff code:8543.70.9860
    Package Dimensions:2 x 2 x 4 in.

    Related Products

    Line Amplifiers / Interface
    • FP-BUC2

      Balanced to Unbalanced Converter - 2 channel

    • FP-UBC2

      Unbalanced to Balanced Converter - 2 Channel

    • RU-AFC2

      Stereo Audio Format Converter

    • Unbalanced to Balanced Amplifier


      Unbalanced to Balanced Amplifier - 2 channel

    • STA-1M

      Audio Line Amplifier - Mono: -14 to 14 dB Gain

    • STA-2A

      Dual High Gain Line Amplifiers

    Microphone Products
    • RU-MLA2

      Dual Microphone / Line Preamplifier

    Related Products

    General Mounting Accessories
    • DMK-5

      Detachable Mounting Kit for RDL Modules

    • MB-1

      Mounting Kit - RU, ST and TX Series

    • SR-4

      STICK-ON Series Mounting Rack - 7 modules

    STICK-ON® Mounting Accessories
    • SMK-12

      STICK-ON Mounting Plate

    • SR-10

      STICK-ON Series 19" Mounting Rack - 10 modules

    • SR-12A

      STICK-ON Series 19" Mounting Rack - 12 modules

    • ST-PBR4

      STICK-ON Mounting Bracket

    • ST-RRB1

      Rear rack rail mounting kit for any STICK-ON module

    • STR-19A

      STICK-ON Series 19" Racking System - 12 modules

    • STR-19B

      STICK-ON Series 19" Racking System - 10 modules

    • STR-H6A

      10.4" Rack Mount for 6 STICK-ON Series Products

    General Wiring Accessories
    • DTB

      STICK-ON® Series Detachable Terminal Block

    DIN Rail Mounting Accessories
    • DRA-35S

      STICK-ON DIN Rail Adapter - 1 module

    • DRA-35S6

      STICK-ON DIN Rail Adapter - 6 modules




    CAD FilesUnitsFormat
    Engineering Functional BlockAmericanDXF
    Panel Diagram - EndAmericanDXF
    Panel Diagram - FrontAmericanDXF
    Panel Diagram - EndMetricDXF
    Panel Diagram - FrontMetricDXF
    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