35
The HIGHPASS filtering setting (HPF) - on the respective (FILTER)
FREQ. control - of the satellite channels will also take away unneces-
sary mechanical and electrical 'strain' from coaxial speakers or compo-
nent speaker systems (compos), as such speakers are not designed to re-
produce powerful bass signals in the first place. Depending on the ac-
tual 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 power-
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 frequencies
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 subwoofer
should usually be selected between 50 and 90 Hz. Adjust the LOWPASS
FREQ. cut-off control in such a way that the bass reproduction 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 subwoofer
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.
C202 402 502 (D+E) 30.04.2001 10:14 Uhr Seite 35
