Millennia LOC Analog Legacy Phonographic / Archiving Preamplifier - Manual (Page 8)

1
LOC
Millennia
Media & Music Systems

LOC Millennia
Media & Music Systems
LEGACY RECORDINGS
The 78 RPM record was a standard format for decades, followed by 33-1/3 RPM. While
33 RPM “LP” records produced after 1954 almost universally follow the EMI or RIAA
standards, compensation curves used for 78 RPM records varied significantly between
manufacturers and era. Via historical research and empirical testing, audio engineers
have attempted to classify the myriad of legacy equalization formats. The following
chart lists a small sampling of various EQ curves which have been derived from papers,
audio journals, jacket information on early LPs, experimentation, and other sources for
records made generally between 1925 and 1955. The audio engineer should use these
numbers as a guide only. Ultimately, use your ears as the final reference for correct
compensation on legacy formats.
SOURCE SERIES TURNOVER (Hz) ROLLOFF (dB @ 10 kHz)
Acoustic Recording (such as
cylinders, etc..) 0 (or as required) 0 (or as required)
“AES”
standard
400 -12
AFRS Transcriptions 500 0 or -5
Allegro 750 -16
Allied 500 -16
American Recording Society 500 -12 or –13.7
Angel 500 -12
Arizona 400 -12
Artist 500 -16
Atlantic 500 -16
Audiophile 300 -8
BBC Transcriptions 1949 500 -5
BBC Transcriptions most 250-300 0 to -5
Bach Guild 501-529 500-750 -16
Banner adjust as required 500 -16
Bartok 629 -16
Bartok 301-304, 309, 906-920 700 -16
Berliner speed = 71.29 RPM 0 0
Blue Bird 800 -10
Blue Note Jazz 400 -12
Boston COL* -16
Brunswick rare 1000 -8.5
Brunswick from 1946 300 -16
Brunswick early 300-500 0 or -16
BSI 353 -10.5
Caedmon 629 -11
Caedmon 1001-1022 700 -12
Cameo inconsistent, adjust as required
Canyon 400 -12
Capitol FDS 400 -12
Capitol-Telefunken 500 0
Capitol 500 -12
SOURCE SERIES TURNOVER (Hz) ROLLOFF (dB @ 10 kHz)
Cetra Soria 400 -12 or -16
Cetra 400 -11
Colosseum 400 -12
Columbia* 1925 200 -7
1926 250 -5
1938-most 300 -16
various COL* -16
European 300 -5
Concert Hall 400 -12
Contemporary 400 -11
Cook Laboratories 500 -11
Cook Laboratories binaural inside band 500 0
Coral 400 or 750 -12 or -16
Decca early 150 or 300 0 or -6
1946- 400 or 500 -12
Decca FFRR 1949 250 -5
Decca FFRR 1951 300 -14
Deutsch-Grammophone 300 -5
Dial 500 or 750 -16
Disc 300 -16
Ducretet-Thomson 450 -11
EMI 1931 250 0
33LP 500 -12
EMS 375 -12
Edison 0 0
Electrola 800 -10
Elektra 629 -16
Epic thru 1954 COL* or 750 -16
Esoteric 400 or 500 -12
European 280 0
Festival 750 -16
Folkways 629 -16
Good Time Jazz 400 -12
Gramophone 300 -10
HMV 1925-1946 250 0
HMV 1946 400 -10
HMV 1946-1954 500 or 800 -16
HMV american 400 -12
Handel Society 750 -16 or -17
Haydn Society 750 -16 or -17
Harmony Acoustics thru 8/29 300 -16
Hit of the Week 500 -5
Kapp 700 -16
Kendall 629 -16
King 500 -16
Linguaphone 300 0
L’Oiseau-Lyre 500 -10
London early 300 0