RDL (Radio Design Labs) STA-1 Universal Line Amplifier

Used, pulled from working install, great condition. A few scratches and scuffs from use.

The STA-1 is a dual-channel line-level pre-amplifier 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.

Some features 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 


For more information, see the RDL website.

NOTE: Requires a 24V DC power source or a bi-polar (+/-12V DC or +/-15V DC) power supply which is NOT INCLUDED.

The STA-1 is part of a group of products in the STICK-ON series from Radio Design Labs. The idea is to permit permanent or removable mounting. As such, this unit has Velcro on the back as shown. 


[REF: STA-1_2]