④
have the Lundahl output transformer which is also capable of also driving unbalanced
loads.
4] Controls and Indicators
The Zodiak has two separate channels of equalization each with identical controls. If
using the unit on stereo material, it would be normal to set the controls identically on
each channel. As the name Tilt-n-Filter suggests, the unit features a Baxandall style tilt
eq control along with complimentary filter sections.
LO-CUT SECTION
This control is used to attenuate low frequencies (high pass filter), and is adjustable
from 26Hz to 220Hz. The slope (roll-off) of the filter is set to a Bessel 12dB per octave
with frequencies marked on the front panel being the -3dB point of the roll-off curve. It
can be switched in and out of circuit with the IN push button switch below the knob.
HI-CUT SECTION
This control is used to attenuate the high frequencies (low pass filter), and is adjustable
from 2.3kHz to 21kHz. The slope (roll-off) of the filter is set to a Bessel 12dB per octave
with frequencies marked on the front panel being the -3dB point of the roll-off curve. It
can be switched in and out of circuit with the IN push button switch below the knob.
BELL SWEEP SECTION
The Bell Sweep is a parametric equalizer that allows you to reduce or increase
resonance in the mid-range frequencies, and there are 3 controls associated with it.
The entire section can be switched in and out of circuit with the IN push button.
CUT/BOOST – sets the amount of attenuation or gain applied at the centre frequency
of the section, and is calibrated in decibels (dB).
FREQ – adjusts the centre frequency of the bell filter between 65Hz to 720Hz, or 770Hz
to 8800Hz when the high range mode is engaged with the HI switch below the knob.
