JL Audio XD700/5 - Manual (Page 10)

10 | JL Audio - XD700/5 Owner’s Manual
When a pair of the XD700/5’s main channels
are bridged, they will deliver 200W x 1 into a
4 ohm load or 150W x 1 into an 8 ohm load.
Operating a pair of bridged channels into a
load lower than 4 ohms is not recommended.
A bridged pair of channels requires that both
channels in the pair receive input. You must
connect the mono or stereo source signal to
both the left and right inputs the bridged
channel pair. Connection of only one input will
result in reduced power output, increased
distortion and can cause the amplifier to
overheat. Do not do this!
When a pair of the XD700/5’s main channels
are operating in bridged mode, the output will be
in mono (only one channel). This mono channel
can contain only right channel information, only
left channel information, or the sum of the signals
from right and left input channels. In order to
achieve one of these options, configure the inputs
to that pair of channels in one of these two ways:
1) Left Channel Only or Right Channel Only
Information: If you wish to send a left-only
or right-only signal to a pair of the XD700/5’s
channels you must use a “Y-Adaptor” to split
the single channel signal into both left and
right RCA inputs of the bridged channel
pair. This option is used when deploying a
pair of the XD700/5’s main channels to drive
left channel speakers only and the other pair
of the XD700/5’s main channels to drive right
channel speakers only.
2) Left + Right Channel Information: When
bridged and fed by a stereo source signal, a
bridged pair of the XD700/5’s channels will
automatically combine the left and right input
signals into a summed mono (left + right)
input signal.
SUBWOOFER OUTPUTS
The XD700/5’s single subwoofer channel is
designed to deliver power into subwoofer loads
equal to or greater than 2 ohms. It is rated for
300W into 2 ohms, 250W into 3 ohms and 200W
into 4 ohms (Continuous Power, RMS Method).
Subwoofer loads below 2 ohms nominal are not
recommended and may cause the amplifier
to initiate a protection mode which reduces
power output.
The XD700/5’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. If only connecting one
pair of subwoofer wires, it is not necessary to use
both sets of connections.