The STA-2A is a dual-channel, line-level audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 k ohm 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 ohm 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 ohm transformers. The STA-2A is specifically designed for such installations, and is also ideal in installations requiring high gain in line-level audio transmission.
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
Amplifier Signal Type - Audio
Amplifier Type - Other
Operating Temperature (Maximum):
131 F
Operating Temperature (Minimum):
32 F
Maximum Frequency Response (Bandwidth):
100 kHz
Maximum Frequency Response (Bandwidth):
100000 Hz
Minimum Frequency Response (Bandwidth):
10 Hz
Minimum Frequency Response (Bandwidth):
0.01 kHz
Total Harmonic Distortion + Noise (THD+N):
0 %
Shipping Weight:
0.25 lbs
Number of Inputs:
2
Number of Outputs:
2
Amps per STA-2A:
2 identical circuits (stereo or dual mono operation)
Inputs (2):
20 k Ohms balanced or unbalanced
Input Signal (for +4 dBu out):
-20 dBu (-18 dBV) to +18 dBu
Maximum Input Level:
+24dBu
Outputs (2):
150 ohms balanced or 75 Ohms unbalanced
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