Important
Use either the low level or high level input, do not
use both at same time.
Low level input
Use a pair of shielded stereo audio cables with RCA
type jack. Most trunk-mount
amplifiers need a 20 feet
RCA cable ( appr 5 – 6 me-
ters). Most under the seat
installations require 12 feet
( 2 – 3 meters) RCA cables.
Avoid placing the RCA cable
close to speaker cables,
power cables and remote
control cable. Connect to input socket R / L.
X-A40 has dual inputs Front R / L & Rear R / L.
Depending on your chosen configuration you can
use either two separate RCA cables, or a single
RCA cable together with an Y-split to connect both
inputs.
X-A30 has dual inputs, one for the stereo channels
(Front Channel input R / L), and one for the mono
channel (Sub Channel input R / L). Both inputs must
be connected on the mono channel input socket.
Input and controls
Low level Input Wiring
Inputs may be low level from the RCA output of the car
stereo or high level from the car stereo speaker out-
put. Low level = RCA is to prefer for the best sound
quality.
Connect left and right speaker wires coming from
the car stereo to the high level input as shown. You
must connect both plus and minus as the inputs are
balanced, connecting plus only gives lower level and
bad sound quality. By changing the polarity of plus
and minus, you can change the phase.
X-A10/20/30
On these models you connect as in this example:
X-A30
On this model the high level signal is fed internally
to SUB-channel when using high level input and the
Parallel input switch in position P SUB.
X-A40
The four channel amplifier is connected likewise,
however we have four channels.
You can feed two channels from RCA and two
channels using high level input from rear speaker
cables, or all channels from high level input.
5
High level input socket and plugs.
Automatic turn on when using high level input.
The amplifier turns on automatically when using high
level input, you don’t need to connect a separate
remote wire from your head unit.
For a soft turn ON /OFF operation we recommend
you to use a remote wire, if this is available.
Parallel input on X-A30, X-A40
If you don’t have dual line cables to
Front & Rear channel inputs you can
use a single line cable. Connect to
the stereo Front input sockets and
set the Parallel input swich to posi-
tion P SUB (X-A30)
or
P REAR (X-A40) and the signal is
fed to both input sockets
automatically.
High Level Input wiring
Hi level input plug for Front channels.
High Input
(Front)
White: L ch.+
White/Black: L ch.-
Grey/Black: R ch.-
Grey: R ch.+
High Input
(Front Ch)
White: L ch.+
White/Black: L ch.-
Grey/Black: R ch.-
Grey: R ch.+
Hi level input plug for Rear channels.
High Input
(Rear)
White: L ch.+
White/Black: L ch.-
Grey/Black: R ch.-
Grey: R ch.+
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