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Verfügbare Sprachen
Verfügbare Sprachen
1 Connecting the remote lead
The remote lead is connected to the automatic antenna
(aerial positive) output of the head unit (radio). This is
only activated if the head unit is switched ON. Thus the
amplifier is switched on and off with the head unit.
2 Connecting the battery cable
Connect the +12 V power cable to the positive terminal
of the battery. Recommended cross section: min.
2
16mm
.
3 Connecting the ground cable
The ground cable should be connected to a central
ground reference point (this is located where the negati-
ve terminal of the battery is grounded at the metal body
of the vehicle), or to a bright bare-metal location on the
vehicle chassis, i.e. an area which has been cleaned of all
paint residues.
4 Fuses
The input fuses are connected in parallel and provide
protection against an internal equipment fault, i.e. the
system must be additionally protected by a further line
fuse located in the vicinity of the battery (max. distance
from battery: 30 cm). The fuse ratings are 4 x 20 ampe-
res, and both must be installed as the amplifier protec-
tion rating is 80 amperes (4 x 20 A).
5 Fuse Function Indication
If the fuses (4) are destroyed due to malfunction the red
LED illuminates. In normal operation the LED turns off.
6 - 7 Signal input
The A1 Competition has RCA connectors for RCA
cables that can be connected with the pre-amplifier out-
put of the line-outputs of the headunit or of a pre-ampli-
fier i.g. HXE 100. This connectors are gold-plated to
ensure a better signal transmission.
8 Level control for input sensitivity
These control can be used to match the input sensitivity
of the inputs 6 and 7 - to the output voltage of the
connected head unit. These control is not a volume con-
trol and are solely intended for the purpose of sensitivi-
ty trimming. The control range extends from 500 mV to
8 V.
9 - 11 CPS - Color Protection System
This LEDs show the operation mode of the amplifier
green (11) = in operation; yellow (10) = malfunction of
the amplifier, short circuit at loudspeaker output; red (9)
= overheating
If the amplifier shuts off due to overheating it can take a
while until it turns on again. This depends on the outsi-
de temperature.
12 Switch for LP/BP, Linear and HP
To switch the internal active crossover to Highpass/ Full
Range (linear) or Lowpass.
If this switch is set on Highpass the frequency range can
be adjusted with switch No. 14 and the exactly frequen-
cy can bet set with control No. 18.
At switch position Lowpass/Bandpass the Highpass is
always active. That means a Bandpass is built in any
case. With switch 14 and control 18 adjust the
Highpass and with switch 13 and control 17 adjust the
Lowpass. Thus every desired Bandpass between 15 Hz
and 6000 Hz can be adjusted.
Caution! To avoid a lost of sound pressure make sure
that the crossover frequencies of High- and Lowpass
are separated of 2 octaves when building a Bandpass.
That means: If the lowpass signal is adjusted to 320 Hz
the highpass should be adjusted 2 octaves lower on
approx. 80 Hz. (1 octave = double frequency or half fre-
quency)
If a subwoofer is connected we recommend to use
highpass control 18 as variable subsonic filter or to
turn the control counter-clockwise to 15 Hz to get a
subsonic filter.
13 Control for frequency range Low Pass
This control enables to adjust the control range of the
potentiometer 17 from 15 Hz up to 80 Hz, from 80 Hz
up to 700 Hz and from 650 Hz up to 6 kHz.
14 Control for frequency range High Pass
This control enables to adjust the control range of the
potentiometer 18 from 15 Hz up to 80 Hz , from 80 Hz
up to 700 Hz and from 650 Hz up to 6 kHz.
15 Stereo/Mono switch
To set the operating mode of the amplifier.
Mono: To use this mode set the switch to Mono (M) and
use input „MONO" only.
Stereo: To use this mode set the switch to Stereo (St)
and use inputs „MONO" and „STEREO". In posiition
„St" both inputs (6 and 7) must be used.
16 Speaker terminal
17 Control for frequency adjustment Low Pass
Control to adjust the crossover frequency from 15 Hz to
6000 Hz
Low Pass: 15 - 80 Hz
variable
Hz
15 Hz
80 Hz
Low Pass: 80 - 700 Hz
variable
Hz
80 H
700 H
Low Pass: 650 - 6000 Hz
variable
2K
5K
6 kHz
650 Hz
18 Control for frequency adjustment High Pass
Control to adjust the crossover frequency from 15 Hz to
6000 Hz
High Pass: 15 - 80 Hz
variable
Hz
15 Hz
80 Hz
High Pass: 80 - 700 Hz
variable
Hz
80 Hz
700 Hz
High Pass: 650 - 6000 Hz
variable
2K
5K
Hz
650 Hz
6 kHz
Hz
7
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