Hi-Z (for high-impedance Moving Magnet cartridges)	Schematic	Parts List
Lo-Z (for low-impedance Moving Coil cartridges)	Schematic	Parts List
Board Outline

The Retro is a balanced input RIAA filter/gain stage for integrating vinyl into your balanced audio chain. There are two versions of the circuit:

Hi-Z is designed for higher-impedance MM cartridges

Low-Z is designed for low-impedance MC cartridges

The Retro uses Texas Instruments OPA1632 fully-differential and OPA-1642 JFet-input op-amps, low-noise Dale RN55/CMF55 resistors, Wima and Dayton Audio polypropylene, and CD silver-mica capacitors.

While Retro is designed for balanced wiring of your cartridge, it will also support standard single-ended input wiring (by tying -IN to GND), and still provide balanced output.

You can read more about the Retro module on DIYAudio.

The Retro requires a 12-15V bipolar supply, such as our LCBPS or Placid HD BP.