11
EQUALIZATION SECTION MONO INPUT (SPECTRA-C)
Hi Freq 12kHz/8kHz Selection Switch
This switch selects the corner frequency of the shelving high frequency control. The 8 kHz position will have
a more dramatic effect on high frequency signals than the subtle effect of the 12 kHz frequency position.
Correct frequency selection should be performed by listening for the desired effect on the input signal. If in
doubt, we suggest the use of the 12 kHz position.
Hi Frequency Level Control
Adjust the high frequency cut/boost b/-15dB. The center “0” position of this control has a detent
to indicate that it is having no effect of the associated channel signal. Boost or cut of the high frequency
level control is usually used for minor tonal adjustments.
Hi-Mid Variable Freq Select Control
This control adjusts the center frequency of the hi-mid frequency band EQ between 400Hz and 8kHz at a
bandwidth of approximately one octave.
Hi-Mid Freq Level Control
Adjust the high-mid band cut/boost b/-15dB. The center “0” position of this control has a detent to
indicate it is having no effect of this frequency band. The high-mid frequency controls are used for minor
tonal adjustment or repair of a specific band of frequencies.
Lo-Mid Freq Control
This control adjusts the center frequency of the low-mid frequency band between 100Hz and 2 kHz at a
bandwidth of approximately one octave.
Lo-Mid Freq Level Control
Adjust the low-mid frequency cut/boost b/-15dB. The center “0” position of this control has a
detent to indicate it is having no effect of this frequency band. The low-mid frequency controls are used for
minor tonal adjustment or repair of a specific band of frequencies.
Lo Freq Level Control
Adjust the low frequency cut/boost b/-15dB. The center “0” position of this control has a detent to
indicate that it is having no effect of the associated channel signal. Boost or cut of the low frequency level
control is usually used for minor tonal adjustments.
Lo Freq 120Hz/60Hz Selection Switch
This switch selects the corner frequency of the shelving low frequency control. The 120Hz position will have
a more dramatic effect on low frequency signals than the effect of the 60 Hz frequency position. Correct
frequency selection should be performed by listening for the desired effect on the input signal. If in doubt,
we suggest the use of the 120 Hz position for boost and 60Hz position for cut.
EQ On Switch With LED
This switch places the EQ circuitry into the console signal path. EQ activation is displayed by the illumination
of a blue LED next to the EQ on switch. When not in use, it is suggested that the EQ switch be kept in the OFF
position for the best phase shift performance.
