The 6/15 switch with LED indication (3)
Via this switch you can change the scale (maximum boost/cut) of the graphic EQ. In its normal
position (LED out) the scale is +/- 6dB: use this scale for minor adjustments but with great
precision. When you push the button the LED will light and you will have access to the full
scale of the graphic EQ: +/- 15dB.
High Pass Filter Frequency Selection (4)
Via this rotary control you can adjust the high pass filter. This is a filter with a fixed slope of
12dB/octave; use the control to adjust the cut-off frequency between 20Hz and 250Hz. With
this section you can get rid of unwanted low frequency noise such as rumble or microphone
handling noise. Again: it is better to use this filter to cut-off low frequency noise than to use
several bands of the graphic section since less filters is always better.
high pass filter set at 50Hz
High Pass Filter on/off switch (5)
When the accompanying LED is out, the filter is not in the signal path. Push the switch to
activate the filter (the LED will light). You can use this switch to compare between filter in en
out to verify if the used setting thus not degrade your musical signal too much.
20
15
10
5
-5
-10
-15
-20
-25
-30
-35
-40
dB 0
25 31 40 50 63
100 120 160 200 250 315 400 500 630 800 1k 1k25 1k6 2k 2k53k15 4k 5k
8k 10k12k5 16k 20k Hz
6k3
80
