XPRO 4000 owner’s manual • page 03 • black
3
GB
O W N E R ' S M A N UA L
2/1 CHANNEL UNIVERSAL CAR AMPLIFIER
Features
2 x 140 W/2 x 90 W • can be used in a bridge connection 1 x 250 W (4 Ohm) • for 2 or 4 Ohm speaker s
HiFi MOSFET final amplifier • MOSFET adapt er • adjus t able bass boos t (0/+6/+12 dB) • 3 sound swit ch
modes t o drive bass, treble and wide-range speaker s • adjus t able cut-of f frequency • input level
contr ol • two LED’s t o signal power and the operation of pr ot ection cir cuits • anti-pop circuit for swit ching
on • output t o other amplifier s • gold-coat ed connect or s • low and high-level line input
The
XPRO 4000
universal two-channel car amplifier is suited to drive bass, mid+treble and broadband speakers. Its high
output power makes it ideal for sub boxes and sub tubes in a bridge circuit. It can be used with 2 or 1 channels. Its sound
switch is adjustable, allowing you to set the optimal frequency transmission for your system. For enhancing the transmission
of bass frequencies the amplifier also has an adjustable SUPER BASS boost circuit.
Electronic sound switch
The amplifier can be used universally because of the three-state adjustable active sound switch. The sound switch allows you
to use it either as a traditional amplifier to drive broadband car speakers, or to separately drive bass or mid+treble speakers
only. The sound switch’s cut-off frequency can be adjusted between 50 - 250 Hz or 120 - 3.000 Hz. This means that in sub
bass (LPF) mode the frequency range can be adjusted between 10 - 50 Hz and 10 - 250 Hz, and in HPF mode, between
120 - 50,000 Hz and 3.000 - 50,000 Hz. In broadband (FULL) mode the transmitted frequency range is 10 - 50,000 Hz.
Both sets of switches and controls affect two channels identically.
Combinations of settings
X - O V E R
S U P E R B A S S
FULL
LPF
50-250 Hz
HPF
120-3.000 Hz
BOOST 0 dB
BOOST +6 dB
BOOST +12 dB
s o u n d s w i t c h s e t t i n g
b a s s b o o s t
broadband
bass
mid+bass
off
mid
maximum
Connecting the speakers
Make sure you connect the speakers with the correct polarity. In stereo mode use at least 2 Ohm speakers. When using in a
high-power bridged connection, use at least 4 Ohm speakers.
You can achieve this load impedance by connecting multiple speakers, but you must make sure that their total impedance
together reaches the specified value. The recommended cross-section of the speaker cords is 2x1mm
2
R- / R+
: right speaker
L- / L+
: left speaker
BRIDGE - / +
: bridged connection (mono)
Connecting the input
Use a stereo cable with RCA plugs to connect the two sockets labeled “RCA” to the source (car stereo, headset etc.).
Lead this cable away from the power and speaker cables.
If your car stereo only has a speaker output and no low-level (line) out, you can use the high-level input labeled HIGH IN
with the included cable. If the audio device has both types of output, it is recommended to use the low-level one. You must
never connect both types of input at the same time.
Connecting the power supply
You must supply power through three connectors to the amplifier. The length of the cable between the battery and the
external fuse socket (12 V, not included) should not exceed 50 cm. The ground cable should also be as short as possible.
Connect the negative wire first. It is very important that this connection is perfectly grounded. Otherwise the amplifier may
produce noise or malfunction. The cross-section of the power cords should be at least 6-10 mm
2
. (REM cable: 0.75 mm
2
)
GND
: ground (-)
REM
: remote control*
B+
: +12 Volt
* If your car stereo has no 12 V output for this purpose, connect this point to the power cable. In this case, however, it is
recommended to either put a switch before the remote control’s connection, or to take the control signal from a location
which has no voltage when the ignition is off. Otherwise the amplifier would be on all the time, draining the car’s battery.
