Operation Manual

The "Loudness" function should also be deactivated.

The HIGHPASS filtering setting (HPF) - on the respective (FILTER) FREQ.

control - of the satellite channels will also take away unnecessary mecha-

nical and electrical 'strain' from coaxial speakers or component speaker

systems (compos), as such speakers are not designed to reproduce

powerful bass signals in the first place. Depending on the actual cone

surface area, voice-coil diameter and the rated power handling 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

capacity 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 appro-

priate 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 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 reproduction will be

precise and rich, while still delivering a good and solid low-end bass.

Subwoofer Generally, setting the LPF lowpass cut-off

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.

C109-509 Manual DEF.indd 39C109-509 Manual DEF.indd 39 15.02.2005 15:30:34 Uhr15.02.2005 15:30:34 Uhr