Initial Start-Up And Functions - HELIX M ONE X Manual

Initial start-up and functions

8 Q-Factor
This control is used to adjust the Q factor (band-
width) of the Bass Boost. When set to "NAR" only a
narrow range around the center frequency (defined
by control 9) will be affected whereas when set to
"WIDE" the Bass Boost
around the chosen center frequency. The Q factor
remains constant if the centre frequency (control 9)
is changed
.
9 Bass Boost Frequency
This control is used to adjust the center frequency
of the Bass Boost from 30 Hz to 80 Hz. The ad-
justed bass frequency can be enhanced from 0 to
12 dB with control 7.
This is useful to emphasize or correct a determined
frequency of the subwoofer (kickbass).
16
has a broadband effect
Subsonic
10
This control is used to adjust the crossover
frequency of the subsonic filter from 10 Hz to 50 Hz.
The subsonic filter cuts off very low frequencies
which aren't audible and therefore relieves the am-
plifier and also the subwoofer. Additionally the am-
plifier will have more power available for the audible
frequencies. This control is always activated and its
adjustment is mandatory.
Lowpass
11
This control is used to adjust the crossover frequen-
cy of the lowpass filter from 50 Hz to 250 Hz. This
control is always activated and its adjustment is
mandatory.
In combination with the subsonic filter, the lowpass
filter creates a bandpass in any case. By adjusting
the subsonic (control 10) and lowpass filter (con-
trol 11) any bandpass between 10 Hz and 250 Hz
can be realized.
Caution: To avoid a loss of gain make sure that the
crossover frequencies of the subsonic and lowpass
filters do have an interval of at least two octaves
when generating a bandpass. That means if the
lowpass is adjusted to 100 Hz the subsonic should
be adjusted to 25 Hz or less (one octave = doubled
frequency or halved frequency).