– 12 –
– 13 –
2.0 SPEAKER IMPEDANCE & POWER WIRE INFO
It is recommended that you follow the optimum speaker / subwoofer impedance suggestions
below.
A250
➞
4/2 ohms stereo / 4 ohms mono bridged
A295
➞
4/2 ohms stereo / 4 ohms mono bridged
A460
➞
4/2 ohms stereo / 4 ohms mono bridged
A480
➞
4/2 ohms stereo / 4 ohms mono bridged
A1300
➞
4/2 ohms mono
3. AMPLIFIER MOUNTING
Attention! For your own safety, disconnect the negative battery terminal (GND) or remove
the main fuse in the positive power cable near the car battery, before you start any wiring
work!
Before you proceed to install this AXTON amplifier, it is recommended to map out the
complete system and the respective wiring required. Consider all additional electrical
requirements and accessories, such as power cables, interconnect cables etc., to complete
the install. Please note that - because of possible interference problems with the existing car
electrics and electronics, especially the routing of the signal cables and the chassis ground
connection will have a profound impact on the trouble-free (noise free!) operation of the
amplifier.
The mounting location should be carefully selected and in the interest of passive driver and
passenger safety, the amplifier must be securely mounted. Make sure that there is no wiring
harness, fuel tank etc. behind or below the mounting surface that may be damaged by the
drilling of the holes for the amplifier mounting screws. After installation, there should be a
clearance of at least 5cm to all sides including the top of the amplifier heatsink. Make sure
the unit is not exposed to direct sunlight, humidity, water, oil or spill of other fluids that may
enter the amplifier.
Once the location where the amplifier will be mounted is determined, use the unit as a
template for the marking of the mounting holes with pencil or felt-tip marker. The mounting
holes should be pilot-drilled, using a 2,5 mm or 3 mm drill bit. Bolt the amp down.
Important! There must not be a direct contact of the amplifier heatsink, bottom panel
or any other metal part of the amplifier to the vehicle metal panel! Electrical ground-
loops will cause audible hum!
4. WIRE ROUTING
4.1 MAIN POWER WIRES
We recommend a minimum main power cable cross-section (5m total length) of 10 to
16 mm², for both the positive and the ground wires. Following these recommendations
guarantees a trouble-free operation of your amplifier, as well as full power output.
Run the positive main power cable („+12 V“) directly from the positive terminal of the
car battery to the amplifier. For protection of your car audio system against electrical fire
hazards, resulting from a short-circuit of the main power cable to chassis ground a main
fuse holder must be inserted within the first 30 cm of the positive main power cable. The
applicable fuse value must be matched to the limitations of your main power cable and the
current draw of the amplifier – therefore choose an appropriate fuse value.
Attach the ground cable to the amplifier. In most cases it will be best to keep the ground
cable („-12V“) as short as possible, i.e. to find a chassis contact very close to the amplifier.
The ground power wire must have the same cross-section as the positive power cable. The
contact point where the ground wire is attached to, must be solid and clean, i.e. free from
rust or paint!
Tighten both power input terminals of the amplifier, and double check for perfect fit of both
main cable leads!
4.2 RCA & REMOTE WIRES
For best interference free transmission of the music signal, use double or triple shielded
RCA interconnects only. Twisted pair Interconnects offer excellent noise rejection as well.
Route the RCA interconnects away from potential sources of Interference, such as engine
computers, gas pumps, etc.
Carefully run the audio signal interconnects, the remote wire and – if applicable - the cable
of the low pass level remote control (A1300 only) from the head unit or dashboard to the
amplifier. As mentioned before, the audio signal cables should always be routed completely
separate from the power cables. Connect the remote (turn on/turn off) lead to the respective
input terminal of the amplifier and to the remote output of your head-unit. Now you can
connect the RCA interconnects to the respective outputs of your head-unit and to the inputs
of the amplifier. Pay attention to connect the stereo interconnects correspondingly, left is
1CH, right is always 2CH a.s.o.
4.3 LOUDSPEAKER WIRES
For longer distances to the speakers, it is best to use 1.5 mm
2
or 2.5 mm
2
speaker cables to
avoid a loss of power or risk degradation of the signal quality.
Once the speaker cables have been routed, turn loose the screws of the speaker terminal
binding posts and – after inserting the stripped and bare speaker cable ends – re-tighten the
screws. Maintain correct polarity („+“ to „+“; „-„ to „-„).
Close the electrical circuit by attaching the ground wire to the battery and switch on your
head unit. The status bar below the AXTON logo should turn on. If the status bar does not
illuminate, your installation is wrong! Immediately turn off your head-unit and carefully re-
check all installation and wiring steps!
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