wjm@whuxk.UUCP (08/08/83)
For those who questioned my analog disk dynamic range figures (Ken Newman, et al)
I present the following figures from the Telarc direct-to-disk "Direct from
Cleveland" LP jacket - the dynamic range of the entire procedure from mikes
through console and cutting lathe to finished disk (remember this is d-d so
no tape is involved) is in excess of 80 dB (they didn't say how much). Several
of the early articles in both "High Fidelity" and "Stereo Review" discussing the
first group of audiophile recordings (mostly Sheffield (d-d's) and Telarc digitals
mentioned a 90 dB dynamic range, especially when dbx processing was used to
get rid of the surface noise. If you have't heard a dbx encoded disk - DO SO
there simply isn't any surface noise.
I strongly disagree with Ken Newman about the importance of proper capacitive
loading on MM phono cartriges, and refer him to discussions by either B. V.
Pisha of "Audio" or Julian Hirsch of "Stereo Review" about the effects that
improper loading can have on cartridge frequency response. This is one of
the advantages of MC cartridges - their low inductance makes their capacitive
loading non-critical. The generally accepted tolerance in capacitive loading
on MM cartridges is +/- 50 pF.
Bill Mitchell (whuxk!wjm)