- 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
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. | 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: | 0.003% to 0.009%; (0.005% nominal) | | Output Level: | +4 dBu | | Headroom: | 18 dB (at rated output of +4 dBu) | | Noise: | -80 to -85 dB (referred to +4 dBu);
-98 to -103 dB (referred to +22 dBu) | | CMRR: | -70 dB to -80 dB (100 Hz) | | Crosstalk: | Better than 75 dB | | Power Requirement: | FLOATING, 24 to 33 Vdc @ 50 mA | | Ambient Operating Environment: | 0° C to 55° C |
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