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RE: Soundsmith explains RIAA and Strain Gauge

Posted by coffee-phil on December 11, 2010 at 21:04:07:
Most of what Peter said in his post makes sense to me. From 50 Hz to 500 Hz and from 2121 Hz up RIAA records are recorded constant amplitude so an amplitude responding cartridge such as a ceramic or strain gauge will have the correct response through those parts of the spectrum however from 500 Hz to 2121 Hz the records are cut constant velocity so the response will fall 6 dB / octave over those ~ two octaves. He points that out but says it is a good trade to accept that rather than use EQ to fix it. For a cheap system with a ceramic cartridge who would argue the point but for a high end system using a strain gauge I have to believe the effort would be justified. He points out that the EQ will introduce phase shift. This of course is true but the points of inflection in the recording process (500 Hz and 2121 Hz) introduce phase shift as well. I would think one would want a network on the playpack end which is the inverse of the record EQ. This network wont be the same as the one used with a velocity responding cartridge.

Phil