Radio Design Labs STA-1 Dual Balanced/Unbalanced Line Amplifier

PA SKU # RDL STA1 MFR # STA-1 UPC # 813721010971
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  • Product Highlights
  • Up to 20 dB Gain in an Audio Line
  • Converts Balanced to Unbalanced
  • Converts Unbalanced to Balanced
  • Converts High to Low Impedance
  • Converts Low to High Impedance
  • Bridge an Audio Line Feed
  • Precisely Match Audio Levels

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

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.
  • 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
  • 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)
  • THD+N: 0.003% to 0.009%; (0.005% nominal)
  • Output Level: +4 dBu
  • Headroom: 18 dB (at rated output of +4 dBu)
  • Noise: -80 to -85 dB (referred to +4 dBu);
  • -98 to -103 dB (referred to +22 dBu)
  • CMRR: -70 dB to -80 dB (100 Hz)
  • Crosstalk: Better than 75 dB
  • Power Requirement: FLOATING, 24 Vdc @ 50 mA
  • Ambient Operating Environment: 0 C to 55 C
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