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,
Some features of the STA-1 are:
- No capacitors or transformers in the audio circuits
- Two identical amplifier circuits in each STA-1
- True DC amplifiers provide impeccable audio quality
- Ultra-low distortion
- Ultra-low noise
- 18 dB of headroom at operating level
- Output level adjustable from off to 20 dB gain
- Provides -10 dBV unbalanced to +4 dBu balanced conversion
- Multi-turn trimmers for precise level adjustment
- Recessed adjustments discourage tampering
- All inputs and outputs are RF bypassed
- Full operation in either high or low impedance circuits
- Operation unaffected by unbalancing of inputs or outputs
- Outputs short-circuit protected
- Very high common-mode rejection when bridging balanced lines
- Positive connections via barrier block. No audio connectors to wire