Subsonic Highpass Crossover Adjustment; Input Level Adjustment - EMPHASER EA450-250 Einbau- Und Bedienungsanleitung

5.4 SUBSONIC HIGHPASS CROSSOVER FREQUENCY ADJUSTMENT
This amplifier features a subsonic filter for channel 5, that is activated by setting the operation mode
to "BPF". Adjusting the subsonic highpass filter with the corresponding potentiometer. This setting
depends the size and the power handling of the installed subwoofer system. The higher the subsonic
crossover frequency is set, the higher the mechanical power handling of the connected subwoofer
system will be. The trade-off is reduced low end extension! The subsonic highpass can not be bypas-
sed, when the 5-CH operation mode switch is set to BPF, but you can set the subsonic potentiometer at
10Hz, so the subsonic highpass filtering remains inaudible.

5.5 INPUT LEVEL ADJUSTMENT

To reach a maximum in dynamic response from each individual head-unit/amplifier/speaker combi-
nation, it is important to set the respective input level controls („GAIN") of all channel 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 positions
and start with the channel pair, that drives the subwoofer system!. The low pass level remote control
– if installed in your system configuration - should be set at a low position, so there is enough hea-
droom to turn up the bass level later on.
➡ SUBWOOFER CHANNEL
Set the volume control of your head-unit to approximately 3/4 of full volume, while playing a dyna-
mic piece of music. Slowly increase the input gain control of the channel pair, that drives the subwo-
ofer(s), by turning the GAIN control clockwise until you can just about hear distorted sounds coming
out of your subwoofer system. Reduce the main volume level on your head-unit to a medium listening
level.
➡ SATELLITE CHANNELS
Slowly increase the input gain control of the channel pair, that drives the satellite system, by turning
the GAIN potentiometer clockwise, until you reach a good tonal balance with a slight emphasis on the
bass region. Aim at a full bodied bass response.
Now slowly turn up the input GAIN control of the remaning channel pair 3/4CH, until you reach a
good tonal balance between front and rear satellites.
➡ FINE TUNING OF ALL CROSSOVER FREQUNCY POINT SETTINGS
Finally you can attempt to fine-tune the HP and BP crossover frequencies on your amplifier, to obtain
the best sound quality of all loudspeakers connected to your car audio system.
11