Installation Instructions

XLb 250 A • XLb 300 A
41
Bass boost
The BASS BOOST control < is used to adjust the bass re-
sponse of the ampli er.
The adjustment range is from 0 dB to +12 dB.
X-OVER frequency control
The X-OVER control = allows setting the desired entry
frequency.
Example:
At a setting of 150 Hz, the ampli er has a frequency range
of 25 Hz to 150 Hz.
Settings
The following control setting is recommended as basic
setting before putting the device into operation: Sensitiv-
ity (GAIN) Pos. > to minimum, PHASE Pos. 3 to 0°,  lter
(X-OVER) Pos. = to approx. 80 Hz. Switch on the device and
select a musical piece with distinctive bass playback.
Increase the volume of your car sound system to the desired
volume level. Now slowly increase the GAIN control
> until
you can hear a clear ampli cation of the bass level. Next, use
the X-OVER control = to select a  lter setting that provides
a well-contoured bass. You may have to alternately optimise
the gain control setting > and the  lter setting =.
A droning bass with excessive volume requires a  lter setting
with a low frequency.
The phase switch
3 must be set so that the bass is inte-
grated into the acoustic pattern as best as possible and not
recognisable as an individual source.
Also check your settings of the XLb with the bass control
fully open and, if necessary, with activated loudness. An
overloading of the subwoofer box by selecting an excessive
ampli cation (pos.
>) results in a distorted playback and can
damage the loudspeaker.
Power-on indicator (PWR / PRO)
Green LED:
Output stage on, regular operating status.
Red LED:
Output stage is electronically switched o due to an error.
Recycling and disposal
Please use the return and collection systems avail-
able to dispose of the product.
Subject to changes!
BM_XLb250A_XLb300A_22LG.indd 41BM_XLb250A_XLb300A_22LG.indd 41 12.09.2012 13:05:40 Uhr12.09.2012 13:05:40 Uhr