27
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 LPF / LOWPASS SUB cut-off frequency for the subwoofer should
usually be set in between 50 and 90 Hz. Adjust the LOWPASS SUB
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
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.
2
Sensitivity Adjustments and System Matching
GAIN FRONT, REAR and SUB
To reach a maximum of dynamic response from your individual head unit
/ amplifier / speaker combination, it is important to set the respective
input sensitivity controls (LEVEL) correctly. On the one hand the sensi-
tivity determines the actual signal-to-noise ratio. On the other hand the
sensitivity also controls the maximum distortion-free sound pressure
level (SPL) possible with your specific car audio system.
It is recommended to effect the sensitivity adjustments and system
GAIN matching in the same sequence as listed below:
™ Set all tone controls (Bass, Mid, Treble, Sub) on the head-unit as
well as all fader and balance controls to neutral. The „Loudness“
option should be in the „Off“ position, too.
™ Set all 3 GAIN controls of the C609 to their lowest position.
™ Turn-on your head-unit and turn-up the volume control to approxi-
mately 3/4 of full volume and start playing a well recorded, dynamic
piece of music.
™ Slowly turn up the GAIN control of 5CH until you can just hear
distorted bass sounds. Slowly decrease the GAIN SUB control to the
point where the distortions have disappeared.
™ Now you reduce the main volume level on the head-unit to a
medium listening level.
™ Start turning up the FRONT GAIN control (1CH/2CH) clockwise until
you have reached a good tonal balance between the front satellites
and the subwoofer. A slight attenuation of the bass range should be
preferred, as this will be compensated by normal driving noises.
C609 Manual DE.indd 27C609 Manual DE.indd 27 15.02.2005 10:34:06 Uhr15.02.2005 10:34:06 Uhr
