Filters; Bypass Switch; Power On/Off Led - Klark Teknik Square One Graphic Operator's Manual

Front panel features

Filters

The high and low pass filters on each channel both have an on/off pushbutton switch and yellow LED that
illuminates to indicate that the filter is in operation. Both filters are fixed and have a 12 dBu/octave roll-off
characteristic.
The corner frequencies of the filters, that is, 80Hz on the high pass filter and 12kHz on the low pass filter,
have been selected to match the typical low- and high-end responses, respectively, of monitor wedges in
applications where they are being driven full-range to aid intelligibility and allow higher gain before feedback.
To audition the effect of the filters, just switch them on or off and note the effect.
BYPASS filter
pushbutton bypasses
any active filters

BYPASS switch

Each channel has BYPASS pushbutton on/off switch with red LED that illuminates to indicate a bypass
condition.
When switched on, the BYPASS switch bypasses the input gain and graphic equalisation.

POWER on/off LED

The blue POWER LED on the front panel illuminates to indicate that mains power is applied to the unit.
The unit does not have a power on/off switch.
High pass filter
pushbutton cuts off
frequencies below
80Hz
14
LEDs for on/off filter
indication
Low pass filter
pushbutton cuts off
frequencies above
12kHz
Square ONE Graphic