DIN CCIR LP COLUMBIA AES RCA NAB DIN 45533 45536 45537 IEC 98

Record Equalization:

A lot has been written about Record EQ's. We, at TitanAudio are primarily concerned with EQ's for 45 and 33 rpm records. Most Phono Pre-Amplifiers cannot properly playback older vinyl records due to the fact that almost all Phono Pre-Amplifiers use the RIAA EQ Playback characteristics, which has been in use world wide since about 1965. Prior to this time most records were cut to different EQ standards. 
Our Prinz von Bluecher Phono Pre-Amp Series reflects those different EQ's and some of our Prinz von Bluecher Phono Pre-Amp's have at least 2 different EQ settings. 
 

The following Equalizations where used:
Organization Timeperiode used Time constants used EQ Playback Curve
(click image to enlarge)
CCIRunknown 50µsec + 450µsec
DIN 45533 78's09/1951 to 07/1957unknown

unknown

07/1957 to 04/195950µsec + 318µsec + 3180µsec
DIN 45536 45's03/1953 to 07/195750µsec + 450µsec
07/1957 to 04/195950µsec + 318µsec + 3180µsec

04/1959 to 11/196275µsec + 318µsec + 3180µsec

DIN 45537 33's03/1953 to 07/195750µsec + 450µsec

07/1957 to 04/195950µsec + 318µsec + 3180µsec

04/1959 to 11/196275µsec + 318µsec + 3180µsec

RIAAfrom 1958 to present75µsec + 318µsec + 3180µsec
NARTBfrom 1956 to 196150µsec + 450µsec
Columbia Records (Stereo only! CS #!)from 1956 to 196550µsec + 450µsec with +3dB Boost at 100Hz