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Radio Design Labs STA-2A

RDL

BSW PART:
STA2A

High Output Line Amplifier

$222.51 $296.68
You save $74.17

The STA-2A is a dual-channel, line-level audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 kΩ and accept either an unbalanced or a balanced audio signal. Gain is adjustable from unity to +24 dB using a 25-turn precision audio taper trimming potentiometer. The output line driver circuits are designed to drive long balanced audio lines into 600 Ω loads.

The STA-2A features wideband circuitry for excellent phase response, low noise, low distortion and exceptional audio clarity. RDL's SupplyFlex power input configuration is included in the STA-2A. 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.

Many audio products provide optimum performance when feeding into a bridging input, but may not provide the output needed to directly drive low-impedance lines terminated with 600 Ω transformers. The STA-2A is specifically designed for such installations, and is also ideal in installations requiring high gain in line-level audio transmission.

$222.51 $296.68
You save $74.17

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  • Main Features:
  • Up to 24 dB Gain in Audio Lines
  • Conversion between Unbalanced and Balanced
  • Conversion between High and Low Impedance
  • Low-Impedance, High-Current Line Drivers
  • Dual-Channel Line-Level Preamplifiers
  • High Gain, High Output, High Performance
  • RDL SupplyFlex Power Input Configuration
  • Specifications:
  • Amps per STA-2A: 2 identical circuits (stereo or dual mono operation)
  • Inputs (2): 20 kΩ balanced or unbalanced
  • Input Signal (for +4 dBu out): -20 dBu (-18 dBV) to +18 dBu
  • Maximum Input Level: +24 dBu
  • Outputs (2): 150 Ω balanced or 75 Ω unbalanced
  • Output Signal:
  • Balanced: +4 dBu nominal
  • Unbalanced: 6 dB below balanced line level
  • Maximum Output Level: +25 dBu
  • Frequency Response: 10 Hz to 100 kHz (+/- 0.05 dB)
  • THD+N: < 0.004% (unity gain)
  • IMD: < 0.005% (unity gain)
  • Noise below +4 dBu: < -90 dB (unity gain)
  • Crosstalk: < -80 dB (unity gain)
  • Headroom: > 20 dB (above +4 dBu)
  • Gain: Unity +24 / -14 dB (adjustable) CMRR: > 60 dB (50 Hz to 120 Hz)
  • Power Requirement: GROUND-REFERENCED or FLOATING, 24 Vdc @ 50 mA
  • Ambient Operating Environment:0° C to 55° C