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10 | JL Audio - XD300/1v2 Owner’s Manual
SUBWOOFER OUTPUTS
The XD300/1v2 is designed to deliver power
into subwoofer loads equal to or greater than 2
ohms of nominal impedance.
The XD300/1v2’s subwoofer outputs are
designed to accept 16 AWG - 8 AWG wire. To
connect the subwoofer wires to the amplifier, first
back out the set screws on the top of the terminal
block, using the supplied 2.5 mm hex wrench.
Strip 1/2 inch (12 mm) of insulation from the
end of each wire and insert the bare wire into the
terminal block, seating it firmly so that no bare
wire is exposed. While holding the wire in place,
tighten the set screw firmly, taking care not to
strip the head of the screw.
You will notice that there are two “+” positive
connections and two “–” negative connections.
This is to facilitate multiple subwoofer wiring.
The two positive and two negative connections
are connected in parallel inside the amplifier.
They are not stereo outputs. Connecting two
subwoofers, each to one set of positive and
negative terminals, will result in a parallel
subwoofer connection. When only connecting
one pair of subwoofer wires, it is not necessary
to use both sets of connections.
Subwoofer loads below 2 ohms nominal are not
recommended and may cause the amplifier
to initiate a protection mode which reduces
power output.
STATUS LED / PROTECTION CIRCUITRY
There is a single multi-color LED on the top
surface of the amplifier to indicate the amplifier’s
operating status.
Rem.
|
Oset
|
Signal
Input Voltage
Low
|
High
Turn-On Mode
Monoblock Subwoofer Amplifier
1) Flashing Green: The amplifier is powering up,
audio output is muted.
2) Constant Green: The amplifier is on and
functioning normally, audio output is active.
3) Constant Red: lights to indicate that the
amplifier has exceeded its safe operating
temperature, putting the amplifier into a
self-protection mode, which reduces the
peak power output of the amplifier. When
its temperature returns to a safe level, the red
light will return to green and the amplifier will
return to full-power operating mode.
4) Constant Amber (Yellow): Indicates that
an over-current condition has occurred
and is accompanied by a muting of the
amplifier’s output. Because the muting
behavior may be very short in duration, it
may manifest itself as an audible, repetitive
ticking or thumping noise in the output.
Over-current conditions can be caused by a
speaker impedance lower than the optimum
load impedance range for the amplifier or
a short-circuit in the speaker wiring. The
latter can result from a short circuit between
the positive and negative speaker wires or
between either speaker wire and the vehicle
chassis. The “Status LED” will remain amber
for a few seconds, even if the over-current
condition is of a very short duration.
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