Sound Technology

STA-1

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-12 identical circuits (stereo or dual mono operation)
Gain20 dB (adjustable, separate controls for each channel)
Input Impedance10 kΩ bridging
Input ConfigurationBalanced or unbalanced
Output Impedance200 Ω balanced (drives 600 Ω or 10 kΩ lines)
Output ConfigurationBalanced or unbalanced
Frequency Responsedc to 25 kHz (± 0.25 dB)
THD+N<0.03%
Output Level+4 dBu
Headroom18 dB (at rated output of +4 dBu)
Noise<-75 dB (referred to +4 dBu)
CMRR-50 dB to (50 to 120 Hz)
CrosstalkBetter than 75 dB
Ambient Operating Environment0° C to 55° C
Power RequirementFLOATING, 24 Vdc @ 50 mA
Package TypeCardboard Box
WEEE weight0.14 lbs.
Shipping Weight0.19 lbs.
Tariff code8543.70.9860
Package Dimensions2 x 2 x 4 in.