EMPHASER EA1300, Руководство по установке и эксплуатации

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5. CROSSOVER ADJUSTMENTS
For the amplifier to perform best with your speakers, the electronic crossover controls must
be set and adjusted accordingly. Since all controls can be accessed directly from the top side
of the amp, this should not prove too difficult.
5.1 SELECTING THE OPERATION MODE
You must select and set the appropriate operation mode before you can proceed to to adjust
crossover frequency points. This operation mode depends on the speaker system connected
to the respective amplifier channels.
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Select HIGHPASS, if the speaker system is a component-, coaxial- or triaxial- type.
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Select LOWPASS in case of a subwoofer system.
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Select FLAT, if your speaker system will handle a full range signal without electrical or
mechanical overload.
5.2 HIGH PASS CROSSOVER FREQUENCY ADJUSTMENT
For satellite speaker systems, select the “HPF” mode, to cut off the bass content in the music
signal.
Highpass filtering will take away unnecessary mechanical and electrical ‘strain’ from the con-
nected coaxial or component speaker systems. Depending on cone surface, voice-coil diameter
and the power handling of the speakers, the following recommendations can be issued:
Front Door Satellite Speaker System („HPF” MODE) HP CrossOver Frequency
13 cm 2-way Component System 80 - 110 Hz
16 cm 2- or 3-way Component System 50 - 80 Hz
Rear Satellite Speaker System („HPF” MODE) HP CrossOver Frequency
13 cm 2-way Coaxial or Component System 100 - 120 Hz*
16 cm 2-way Coaxial or Component System 100 - 120 Hz*
6 x 9” or 7 x 10” Triaxial Speaker System 100 - 120 Hz*
* When a subwoofer is part of the audio system install.
5.3 LOW PASS CROSSOVER FREQUENCY ADJUSTMENT
Select “LPF”, to activate the lowpass filter of the integrated electronic crossover.
The LOWPASS cut-off frequency setting depends on the woofer system and each vehicle is
different! As a rule of thumb, settings in between 60 to 90 Hz will usually give solid results. The
woofer lowpass
frequency point is mostly a matter of taste, and must therefore be ‘played by ear’.
5.4 SUBSONIC / HIGH PASS CROSSOVER FREQUENCY ADJUSTMENT
Now proceed to adjust the subsonic highpass frequency. This subsonic crossover frequency
point depends on the size and the power handling of the installed subwoofer system. The
higher the subsonic crossover frequency is set, the better or higher mechanical power handling
will result. The trade-off is reduced low end extension! The subsonic highpass cannot be
bypassed. But you can set the potentiometer to a value of 15 Hz to make subsonic filtering
completely inaudible.
5.5 PHASE ADJUSTMENT
Depending on the speaker systems installed and the subwoofer enclosure type, it may be
necessary to invert the phase of the channel(s) that drive the subwoofer. Do so by trying both
slide switch positions of the Phase control switch. In phase response is what you want - out of
phase will cause a full or partially cancellation of bass signals (and the system will sound "thin").
5.6 INPUT GAIN ADJUSTMENT
To reach a maximum in dynamic response from each individual head-unit/amplifier/speaker
combination, it is important to set the respective input sensitivity controls („GAIN“) of all chan-
nel pairs correctly.
Before you start, you MUST set all tone controls (Bass, Mid, Treble, Loudness etc.) and the
fader on the head unit to their neutral or center positions.
Now turn all input gain controls of the installed amplifiers anti-clockwise to their minimum posi-
tions and start with the channel pair, that drives the subwoofer system.
SUBWOOFER CHANNEL(S)
Set the volume control of your head-unit to approximately ¾ of full volume, while playing a
dynamic piece of music. Slowly increase the input gain control of the channel pair driving the
subwoofer(s), by turning the GAIN control clockwise. Increase clockwise until the bass starts
to distort. Reduce the main volume level of your head-unit to a medium listening level. Proceed
with further channels, if applicable.
SATELLITE CHANNELS
Slowly increase the input gain control of the channel pair driving the satellite system, by turn-
ing the GAIN control clockwise. Increase clockwise until you reach a good tonal balance with
a slight emphasis of the bass range. Repeat for all further channels.
FINE TUNING OF ALL CROSSOVER FREQUNCY POINT SETTINGS
Finally you can attempt to fine-tune the HP, BP and/or the LP crossover frequencies on your
amplifier setup, to reach the maximum tonal balance and channel integration of all loudspeak-
ers connected to your car audio system.