Operation Manual

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The HIGHPASS filtering setting (HPF) - on the respective (FILTER) FREQ.
control - of the satellite channels will also take away unnecessary me-
chanical and electrical 'strain' from coaxial speakers or component
speaker systems (compos), as such speakers are not designed to re-
produce powerful bass signals in the first place. Depending on the
actual cone surface area, voice-coil diameter and the rated power hand-
ling of the 'satellites' it is recomenended to set the hiphpass cross-over
/ cut-in frequency between 40 and 240 Hz.
If the satellite highpass frequency is set too low, the mid-bass repro-
duction will be increased, but at the same time the power-handling ca-
pacity of the satellites will decrease. If the highpass frequency is set
too high, the mid-bass reproduction will become 'thinner' while the po-
wer-handling capacity of the satellites will increase.
As a general guideline, below you find a practice-proven list for
ap-
propriate satellite (HIGHPASS) FREQ. / HPF crossover frequen-
cies
covering the most widely used dashboard, door and rear-shelf
speaker diameters:
Front Satellite Systems HPF (FILTER) FREQ.
10 cm Ø Coaxials or 2-Way Compos 90-120 Hz
13 cm
Ø Coaxials or 2-Way Compos 80-100 Hz
16 cm
Ø Coaxials or 2/3-Way Compos 70 -80 Hz
Heck Satellite Systems HPF (FILTER) FREQ.
10 cm Ø Coaxials or 2-Way Compos 100-150 Hz
13 cm
Ø Coaxials or 2-Way Compos 120-130 Hz
16 cm
Ø Coaxials or 2/3-Way Compos 100-130 Hz
Satellite rule 1 The better sounding satellite system should
always be installed in the front of the vehicle.
Satellite rule 2 Based on identical speaker diameters and
comparable engineering quality of the front
and rear satellites, the crossover / cut-in
frequency of the front satellites should
usually be set lower than the highpass
frequency of the rear satellites.
The (LOWPASS) FREQ. / LPF crossover frequency for the sub-
woofer
should usually be selected between 50 and 90 Hz. Adjust the
LOWPASS FREQ. cut-off control in such a way that the bass reproduc-
tion will be stiff and rich, while still delivering a good and solid low-end
bass.
Subwoofer Generally, setting the LPF lowpass cut-off
guideline frequency too low will result In a weak
and uncontoured bass response. Setting the
LPF control too high tends to give the sub-
woofer a 'booming' sound.
High- & lowpass When selecting the high- and lowpass
system tip frequencies of a sound system' it is
recommended to 'leave a gap' between the
subwoofer LPF cut-off frequency and the
satellite HPF cut-in frequencies. Such a 'gap'
between the LPF and HPF settings can be
helpful to compensate for much of the midbass
resonance (around 100 Hz) otherwise occuring
in most vehicle environments.
C208 408 508 Manual UK-D-F 23.07.2003 19:30 Uhr Seite 35