hifi

After building three phono equalizers (tube amps of-course) I realized that the platenspeler.com (translated: turntable.com) site did not yet contain much information on RIAA equalization.

And even now, I'm sure there are somewhere on the net much better sources of information, but at least I could not find them, therefore I created these pages which contains the following information:

Page 1: Background on RIAA equalization, and the RIAA curve explained
Page 2: Passive RIAA filters (used in my tube amps)
Page 3: Active RIAA filtering (used in my OpAmp based phono amps)
Page 4: Tube examples, containing calculations and spreadsheet info used in some of my tube projects
Page 5: OpAmp examples, calculations/charts/formulas for PhonoClone and opamp based phono amps
Page 6: Designing and building a inverse RIAA filter (Draft)

Page last modified: December 13, 2004