THE ENHANCER
Parametric Phono Equalizer
THÖRESS presents the
Parametric Phono Equalizer MKIII...
A highly versatile vacuum tube phono preamplifier with
MM and MC gain and unique on-the-fly adjustable
tone control facilities. The frequency response of the
amplifier can be controlled within wide limits by varying
the edge frequencies of the de-emphasis characteristic
via three 6-position rotary selectors (tone selectors).
As a side effect of this unique concept, the entire range
of phono equalization curves used by the prominent
record companies throughout history
(including those of pre-microgroove 78-rpm era)
can be activated or at least closely approximated
by choosing appropriate
tone selector settings.