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STA-2A Dual High Gain Line Amplifiers
Pro Net: $192.74
Price: $144.55
You Save: $48.19 (25 %)
Item Number: STA-2A
Manufacturer: Radio Design Labs
Manufacturer Part No: STA-2A
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Up to 24 dB Gain in Audio Lines
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Conversion between Unbalanced and Balanced
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Conversion between High and Low Impedance
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LowImpedance, HighCurrent Line Drivers
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DualChannel LineLevel Preamplifiers
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High Gain, High Output, High Performance
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RDL® SupplyFlex Power Input Configuration
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The STA2A is a dualchannel, linelevel audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 k and accept either an unbalanced or a balanced audio signal. Gain is adjustable from unity to +24 dB using a 25turn precision audio taper trimming potentiometer. The output line driver circuits are designed to drive long balanced audio lines into 600 loads.
The STA2A features wideband circuitry for excellent phase response, low noise, low distortion and exceptional audio clarity. RDLs SupplyFlex power input configuration is included in the STA2A. The power supply input may be fed from a floating (not groundreferenced) 24 Vdc power source, from a bipolar power supply (+/ 12 Vdc or +/15 Vdc) or from a groundreferenced 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 lowimpedance lines terminated with 600 transformers. The STA2A is specifically designed for such installations, and is also ideal in installations requiring high gain in linelevel audio transmission.
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Typical Performance:
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Amps per STA2A:
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2 identical circuits (stereo or dual mono operation)
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Inputs (2):
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20 k balanced or unbalanced
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Input Signal (for +4 dBu out):
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20 dBu (18 dBV) to +18 dBu
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Maximum Input Level:
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+24 dBu
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Outputs (2):
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150 balanced or 75 unbalanced
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Output Signal:
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Balanced:
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+4 dBu nominal
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Unbalanced:
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6 dB below balanced line level
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Maximum Output Level:
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+25 dBu
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Frequency Response:
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10 Hz to 100 kHz (+/ 0.05 dB)
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THD+N:
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< 0.004% (unity gain)
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IMD:
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< 0.005% (unity gain)
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Noise below +4 dBu:
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< 90 dB (unity gain)
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Crosstalk:
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< 80 dB (unity gain)
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Headroom:
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> 20 dB (above +4 dBu)
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Gain:
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Unity +24 / 14 dB (adjustable)
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CMRR:
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> 60 dB (50 Hz to 120 Hz)
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Power Requirement:
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GROUNDREFERENCED or FLOATING, 24 to 33 Vdc @ 50 mA
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Have a Question?
Expert advice is only an email or phone call away. Email advice@globalav.com or call 1-800-595-4436 to speak with one of our knowledgeable system integrators regarding this product.
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