AXTON ATB220 Einbau & Bedienungsanleitung Seite 3

ATB220
BANDPASS ENCLOSURE SUBWOOFER
OPERATING INSTRUCTIONS
Congratulations on your purchase of this AXTON enclosure sub-
woofer system. Please read and follow the provided installation
and operating instructions carefully, to benefit from the max. sound
quality and performance this component is capable of.
CONNECTION & INSTALLATION
Your trunk box subwoofer is designed to be placed in the trunk
compartment of your car, where it uses the boundary effect for linear
output and good bass extension. The terminal binding posts allow
quick and easy installation or removal of the trunk box – should
this be necessary from time to time. Ideally, the box should be
placed with the angled backside against the rear seats or against
the front dividing wall of the trunk compartment.
Connect the speaker wire coming from the sub-amplifier to the
terminal binding post of the subwoofer system. The best connec-
tion polarity of the speaker wire connected to your subwoofer will
be adjusted in the set up process described in the next chapter.
AMPLIFIER ADJUSTMENTS
LOW PASS FILTER
Your AXTON trunk box subwoofer needs a low-pass filtered signal
for optimum results. The low pass filter slope steepness of the
electronic crossover should be at least 12 dB/oct..
Make sure that the low-pass function of the amplifier channel(s)
driving the subwoofer is activated! Use the HPF (High Pass Filter)
function of your amplifier to cut of the low frequencies for the other
channels driving the main speakers and tweeters.
EU Legal Representative: ACR S & V GmbH, Industriestr. 35, D-79787 Lauchringen, Germany
Manufacturer: ACR Braendli + Voegeli AG, Bohrturmweg 1, CH-5330 Bad Zurzach, Switzerland
CROSSOVER FREQUENCY
A recommended starting point for the low pass cut-off frequency
is around 70 to 100 Hz and must be played by ear, i.e. is found
empirically by adjusting the frequency up and down in small steps
until the sonic result is pleasing.
The final crossover frequency and input gain adjustments on the
sub-amp should only be attempted after all tone controls such as
„treble", „bass" and „loudness" have been set back to their neutral/
zero position.
AMPLIFIER INPUT GAIN
Before you proceed, please close the input gain adjustment. Please
refer also to the manual of the amplifier. Now with the music playing
at a 3/4 to 4/5 level, open the input gain of the channel(s) driving
your AXTON subwoofer, until the amount of bass is balanced with
the remaining spectrum of the music.
ACOUSTICAL IN-PHASE CONNECTION
The acoustical „in-phase" connection of your subwoofer is critical
for best sonic results.
In-phase connection means that the corresponding acoustical
outputs of the satellite speakers in the front doors are in phase with
the output of your subwoofer, to sum up properly at the cross-over
frequency point. Out of phase connection means, the acoustical
output will cancel itself at the crossover frequency. Reversing the
polarity of the speaker cables connected to the terminal of your
subwoofer reveals the correct connection, since "in-phase" con-
nection will give you a stronger and fuller reproduction of bass
content and the music that is played back on your sound system.
Once the correct electrical polarity is found, you need to adjust
the input gain once more, and fine tune the crossover frequency
as the last step.
In general, selecting a crossover frequency too low will yield to
unprecise and infra-bass heavy sound without punch, whilst set-
ting the corresponding lowpass x-over point to high will render a
hard and droning sound reproduction.
TECHNICAL DATA
2 x 20 cm Bandpass Enclosure Subwoofer
Frequency response:
Nominal impedance:
Sensitivity (1W/1m):
Nominal power handling:
Maximum power handling:
Dimensions (HxWxD):
30 – 150 Hz
4 ohms
94 dB
200 W
300 W
295 x 665 x 355 mm