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Sensitivity Adjustments and
gain matching
To reach a maximum of dynamic response from your individu-
al head unit / amplifier / speaker combination, it is important
to set the respective input sensitivity controls (GAIN) correctly.
Firstly the sensitivity determines the actual signal-to-noise
ratio. Secondly, 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 LEVEL 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.
➜ Turn the gAin control (s) of the connected amplifier(s)
to its/their lowest positions.
➜ Turn-on your head-unit and turn-up the volume control
to approximately 3/4 of full volume and start playing a well
recorded, dynamic piece of music.
➜ 2- or 4-channel fullrange operation, only: Slowly turn
up the gAin control until you can hear distorted sounds.
Slowly decrease the LEVEL control to the point where the
distortions will have disappeared. The system adjustment
is completed.
Logical sequence to adjust the input gains of installs with
3/4- or 5-channels:
All manuals and user guides at all-guides.com
➜ SUB/ 3- or 5-channel operation (2x) stereo + mono
sub, only:
Slowly turn up the gAin control until you
can hear some distorted bass sounds. Slowly decrease the
GAIN level control to the point where the distortions just
have disappeared.
➜ Now you reduce the main volume level on the head-unit
to medium listening level.
➜ FRONT/ 3- or 5-channel operation (2x) stereo + mono
sub, only: Start turning up the gAin l + r Front control clo-
ckwise until you have reached good tonal balance between
the (front) satellites and the subwoofer. A slight attenua-
tion of the bass range should be preferred, as this will be
compensated later by normal driving noises. For 3-channel
operation the system adjustment is completed.
➜ REAR/ 5-channel operation 2x stereo + mono sub, only:
Start turning up the gAin l + r rear control clockwise until
you feel to you have reached an appropriate 'rear fill' in the
back of the car, so that the overall in-car sound becomes
smooth and homogenous.
➜ Finally, you may want to do some fine-tuning on the
different highpass and lowpass frequencies selected. It
is recommended to start fine-tuning with the subwoofer
lowpass frequency. Then proceed - if necessary - with the
front satellites and finish the adjustments with the rear
satellites highpass frequencies.
imPOrTAnT: All advice on controls and adjustments of this
manual section is based on the assumption that you are also
thoroughly acquainted with all the requirements and features
of the entire audio equipment – especially the head-unit and
the speakers – connected to this amplifier!
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