Retro - Balanced RIAA Stage


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.



    Ordering Options
    Kits
    Retro "HI-Z" Complete Kit (MM)
  • Stereo Pair (Two Mono Channels)
  • Op-amps premounted
  • $75.00 USD (Sold Out)
    Retro "LO-Z" Complete Kit (MC)
  • Stereo Pair (Two Mono Channels)
  • Op-amps premounted
  • $75.00 USD (Sold Out)
    PCBs
    Retro "HI-Z" Board Pair with Pre-Installed OpAmps
  • [2] OPA1632 OpAmps (SOIC) Installed
  • [4] OPA1642 OpAmps (SOIC) Installed
  • $56.00 USD
    Retro "LO-Z" Board Pair with Pre-Installed OpAmps
  • [4] OPA1632 OpAmps (SOIC) Installed
  • [2] OPA1642 OpAmps (SOIC) Installed
  • $62.00 USD
    Retro "HI-Z" Board Pair (no parts) $26.00 USD
    Retro "LO-Z" Board Pair (no parts) $26.00 USD