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hobbyists's
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Page created February 2003
The Finishing Touch
The Moving Magnet Cartridge
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The Moving Coil Principle
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Springs,
Resonances and Mass
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The very heavy Fidelity Research FR-66S has an effective mass of 38
grs.
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Replacing
an MC Cartridge
Replacement Styli for Moving Magnet Cartridges |
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RIAA
Curves, Characteristics, Turnover, Rolloff
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DIALING YOUR DISCS In the early mono days when not everything concerning records and recordings was standardized, High Fidelity, the American magazine for music listeners, regularly published tables with data for adjusting the characteristic of the frequency curve when playing records of various manufacture. Not all records were cut with the same characteristic. Important are the turnover frequency and the rolloff. The table at left gives data for most record labels. The rolloff for the RIAA curve was 13.7 dB. Several record labels did not comply with this standard. That is why many old recordings do sound differently. It is important to take the number of decibells into account. Strange to see that the value for His Master's Voice, Westminster and Remington was 16 dB instead of the prescribed 13.7 dB. Concert Hall only needed 10.5 dB attenuation, the lowest figure in the list. For the die hards who can and will afford it, there are preamplifiers and special units available today that allow the listener to choose the appropriate turnover frequency and the amount of bass boost and treble rolloff. The table at left can be of help, although these units do allow you to adjust the playback characteristic to your own taste as well in relation to the rest of the chain. The table was copied from the October 1955 issue of High Fidelity Magazine. |
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Want
to know the technical specifications of cartridges? Go check the
CARTRIDGE DATA-BASE.
It is a pitty though that no pF (capacitance) values of the MM cartridges are given to determine the best match with a specific (pre-)amplifier. |
Audio & Music Bulletin | LP List | Record Cleaning Service
25 Years CD - Digital Audio Compact Disc
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