Function, functional components and their effect
The W23 3 TiltBaxxEQ is a combination of a tilt filter (level filter) and a Baxandall tone control.
The tilt filter (sound balance) determines the turning point (tilt frequency) of the low and high frequencies
around a switchable center frequency (500 Hz, 700 Hz, 1100 Hz). Simultaneously, the level components of
the high and low frequencies are changed in opposite directions about up to 5 dB around a turning point.
The shift in the tone balance is symbolically represented by the colored button. The red mark left
represents the low-frequency range and the blue mark on the right represents the high-frequency range.
When the red and blue line forms a horizontal line, the TiltEQ is in neutral position and has no effect on
the frequency distribution.When rotated clockwise, the proportions of low frequencies increase and the
high frequency decreases. The effect is reversed by turning the TiltEQ in the opposite direction, then the
low-frequency components become smaller and the high-frequency components increase. This change
also takes influence on the energy of the audio signal and can be compensated by adjusting the gain-pot
(gain).
The Baxandall tone control consists of two faders that separately change the level components for the
high frequency “HF” and low frequency “LF”. The frequency of "HF" (2 kHz, 5 kHz) and "LF" ( 0 Hz, 110 Hz)
can be preselected via toggle switch, too. In center position, the respective filter is deactivated (byp.). This
bypass-function is used to quickly check the filter´s effectiveness. Due to the historical circuit design, the
two EQs influence each other and are part of the circuit.
An illuminated push button ("on") deactivates the entire filter and allows the user to check all set filter
effects very quickly. Technically, this is a hardware bypass, using a relay to switch all the electronics out of
the signal path.
Functional components
Tilt filter
• "tilt angle" - potentiometer with 5 dB control range
• 3 turning points at frequencies 500 Hz, 700 Hz or 1100 Hz
• "gain" - potentiometer with +/- 5 dB control range
Baxandall filter
• High-frequency "HF" adjustable via fader +/- 12 dB
• Switchable frequency range for "HF" band 2 kHz or 5 kHz
• Low-frequency "LF" adjustable by means of fader +/- 12 dB
• Switchable frequency range for low band 0 Hz or 110 Hz
• Separate bypass "byp." for "HF" and "LF" of the Baxandall filter
• Bypass "on" for the entire module
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