Hafler PH60B, Руководство пользователя

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PH60B PHONO STAGE Hafler
3
MAGNET
COIL
STYLUS
The Hafler PH60B is a combination pre-preamp and RIAA preamp that
both increases the level to accommodate the moving coil, adds in the
RIAA equalization curve and then boosts the signal so that it can be used
by a typical high fidelity receiver.
aBoUT THe RIaa eqUaLIzaTIon CURVe
The Recording Institute Association of America (RIAA) figured out that in
order to reproduce a vinyl recording effectively, the high frequencies have
to be exaggerated. Upon playback, the reverse filter must then be applied
– resulting in a flat and natural sound.
Moving coil cartridges produce a much
lower output than a moving magnet. In
order to bring their gain up to a useable
level, between 60 and 70dB of gain
is required. This in fact is extremely
difficult to do without introducing noise
or artefact. This is why moving coil
preamps are more expensive.
10 Hz
Preamp
Playback
Record
100 Hz 1 kHz 10 kHz
-20
-10
0
+10
+20
-60 dB -10 dB
Receiver Amp
Moving Coil PH60B
oVeRVIew