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.
Features:
- 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:
<0.03%
Output Level:
+4 dBu
Headroom:
18 dB (at rated output of +4 dBu)
Noise:
<-75 dB (referred to +4 dBu)
CMRR:
-50 dB to (50 to 120 Hz)
Crosstalk:
Better than 75 dB
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
FLOATING, 24 Vdc @ 50 mA
