Quad 8 444 Mastering/Mid-Side EQ

Projects > Quad 8 444 Mastering/Mid-Side EQ

The 444 is a clone of a 4-band mastering EQ unit with optional M/S operation. It is 500/51x compatible and can be run at a variety of operating voltages.


  • Transformer-balanced output, hybrid transformer/5532 IC balanced input
  • 4-band parametric operation, Hi/Lo Q switches on each band, shelf/bell switches on low/high bands
  • Uses Quad8 AM-10 discrete op-amp


  • ~$350-$400 per module, depending upon transformers used
  • Circuit is currently (6.29.2014) in final stages of prototyping, however entire project documentation is available below

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