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-D40 has dual inputs Front R/L & Rear R/L.
Depending on your chosen configuration you can
use either two separate RCA cable, or a single RCA
cable together with an Y-split to connect both inputs.
X-D30 has dual inputs, one for the stereo channels
(Input R/L), and one for the mono channel (Sub In-
put 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-D10/20/25/30
On these models you connect as in this example:
X-D30
On X-D30 the high level signal is fed internally to
channel SUB when using high level input.
X-D40
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.
5
RCA Output on X-D10, X-D20, X-D25
Use RCA Outputs to
connect additional
amplifiers (not available on
X-D30 / X-D40).
Input Output
RR
LL
High Input
(L/R Ch)
White: L ch.+
White/Black: L ch.-
Grey/Black: R ch.-
Grey: R ch.+
Hi level input plug on amp for CH L/R.
High Input
(Rear)
Violet: L ch.+
Violet/Black: L ch.-
Green/Black: R ch.-
Green: R ch.+
Hi level input plug on amp for CH L/R.
High Input
(Front)
White: L ch.+
White/Black: L ch.-
Grey/Black: R ch.-
Grey: R ch.+
High level input socket
Automatic turn on when using high level input.
The amplifier turns on automatically when using high
level input, you dont 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.
High Level Input wiring
Parallel input on X-D30
If you don’t have dual line cables to
front and sub Input you can use a
single line cable. Connect to the ste-
reo input sockets and set the Parallel
input swich to position P-sub and the
signal is fed to the Sub input socket
automatically.
Parallel
input
Off
P Sub
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