Acoustical Controls - Klein + Hummel O 810 Operating Manual

subwoofers, using XLR "Y" cables, and the signal level adjusted at the source by -9.5 dB or +0.5 dB so that the
reproduction level (at 0 or +10 dB) is consistent with the main channels.
Left
Center
Right
LFE

Acoustical Controls

Acoustical Controls
Acoustical Controls Acoustical Controls
The acoustical controls are low-order analog filters designed to compensate for some of the acoustical issues
commonly found in listening environments. The acoustical controls' settings will depend on the subwoofer's
location and will probably be different for the same subwoofer type positioned in different locations in the same
room. When calibrating subwoofers there are three areas requiring attention: in-room response, level relative the
main loudspeakers, and phase relative to main loudspeakers.
For systems containing subwoofers, it is highly recommended to use an acoustical measurement system to set
the acoustical controls (gain, parametric and low cut filters, and phase) in the most appropriate way to
compensate for the subwoofer's location. This is especially true of the parametric equalizer's controls which are
very hard to set by listening.
The acoustical control set consists of the following:
• The Low Cut Low Cut Low Cut control reduces the output level of the subwoofer in ranges of 30 Hz using a peak filter centered Low Cut
on 30 Hz and with a Q of 1.5 – see graph below. This is used to compensate for a rise in level seen at very low
frequencies due to a lack of LF damping.
Low Cut acoustical control Low Cut acoustical control
Low Cut acoustical control Low Cut acoustical control
O 810 / O 870 Operating Manual
Large system mounting to make a 4- - - - way column system Large system mounting to make a 4 Large system mounting to make a 4 Large system mounting to make a 4 way column system way column system way column system
Parametric Equalizer acoustical controls Parametric Equalizer acoustical controls
Parametric Equalizer acoustical controls Parametric Equalizer acoustical controls
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Klein + Hummel
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