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RDL STA-1M Audio Line Amplifier - Mono: -14 to 14 dB Gain
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    RDL STA-1M Audio Line Amplifier - Mono: -14 to 14 dB Gain

    Manufacturer: Radio Design Labs

    Item #: STA-1M   •   MFG #: STA-1M




    Required Accessories

    The STA-1M allows bridging any audio line, adjusting the gain, and driving a balanced or unbalanced line. The circuit design allows the input to accept either balanced or unbalanced signals, of either high or low impedance. This is an instrumentation type input stage which will amplify the differential input, regardless of ground reference. The output is capable of driving either high or low impedance loads, and the output may be connected either balanced or unbalanced.

    RDL's SupplyFlex power input configuration is included in the STA-1M. The power supply input may be fed from a floating (not ground-referenced) 24 Vdc power source, from a bipolar power supply (+/ 12 Vdc or +/-15 Vdc) or from a ground-referenced 24 Vdc power supply.

    Required Power Supply RDL PS24V Sold Separately

    • Features

      • Single-Channel Audio Line Amplifier
        Balanced or Unbalanced Inputs and Outputs
        Bridge a Line to Avoid Loading
        High to Low Impedance Conversion
        Low to High Impedance Conversion
        Instrumentation Input to Isolate Ground Loops
        Precisely Match Audio Levels
        RDL SupplyFlex Power Input Configuration
    • Specifications

      • Input: 10 kΩ balanced or unbalanced bridge
        Outputs (2): 150 Ω balanced to drive low or high‑Z; 75 Ω unbalanced
        Output Signal: +4 dBu (nominal, adjustable)
        Frequency Response: 10 Hz to 20 kHz (+/‑0.25 dB)
        THD+N: < 0.05%
        Headroom above +4 dBu: > 18 dB
        CMRR: > 50 dB at full gain (100 Hz)
        Gain: Adjustable per chart below
        Unbal. Balanced : ‑7 dB +14 dB
        Bal. Balanced: ‑7 dB +14 dB
        Bal. Unbalanced: ‑14 dB +7 dB
        Unbal. Unbalanced:‑14 dB +7 dB
        Power Requirement: GROUND‑REFERENCED or FLOATING, 24 to 33 Vdc @ 50 mA
        Ambient Operating Environment: 0¡ C to 55¡ C

    Add Accessories for your STA-1M: