The 2020S is a custom designed 1:1 ratio high-impedance audio transformer.  It has 1/4" input and output jacks (interchangeable) and it requires no power supply to operate.  The 2020S is designed to be used with electric musical instruments and specifically to be placed between FX pedals to give your pedals more of a vintage-studio-gear sound.  The steel core laminations provide a bit of a retro sonic signature.  You'll probably notice a little bit of an upper HF boost and a coloration of the mids.  Both of these aspects become more obvious when the 2020S is driven by a boost pedal or when multiple 2020S's are in use in a signal chain.  

Features:

• Custom wound LBA-20SB audio transformer.  See 20SX for a feature-rich version of this transformer.
  
• Designed for Hi-Z signal paths.
• No power supply required.
• input and output jacks are interchangeable with no affect on performance.
  

Technical Information:

• Impedance ratio:  1:1
• Insertion loss: 0.5dB
• Core:  82.7% steel.  The remaining 17.3% is "secret-sauce".
• Frequency Response:  Varies depending on devices connected on in/out.  Typical response (used with FX pedals) is flat from 10Hz-12kHz with a gradual boost reaching +3dB at 20kHz, however results may vary depending on other equipment (impedance) in the signal chain.  
  
• Weight: 7oz (198.447g) 
  
• Dimensions: 3.64" x 1.52" x 1.06" (92.456mm x 38.608 x 26.924​)