SPEAKER OUTPUTS
The XD800/8v2's speaker outputs are designed
to accept
16
AWG - 8 AWG wire.
To
connect the
speaker 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.
Each pairofthe XD800/8v2's channels are
designed to deliver power into speaker loads equal
to orgreater than 2 ohms when using a "stereo"
configuration and speaker loads equal to orgreater
than 4 ohms when using a "bridged" configuration.
OIMPORTANTI
Speaker
loads below 2
ohms
nominal
per
channel
(or 4
ohms
bridged)
are
not
recommended
and
may
cause
the
amplifier
to
initiate
a
protection
mode
which reduces power
output.
BRIDGING CONSIDERATIONS
Bridging is the practice
of
combining the
output
of
two amplifier channels to drive a single
load.
When
bridged, each channel produces
signals
of
equal magnitude, but opposite polarity.
The combined output
of
the two channels
provides twice the output voltage available from a
single channel. The XD800/8v2 has been designed
for bridging
of
its channel pairs without the need
for input inversion adaptors.
To
bridge a pair
of
channels, use the "Left +"
and
"Right
-"
speaker connectors only. The
"Left
-"
and
"Right
+" remain unused.
When
bridged, each channel
pair
will deliver
optimum
power into a single 4
ohm
load.
10
I
JL
Audio-
XD800/8v2 Owner's Manual
OIMPORTANTI
When
a
pair
of
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.
Because a
bridged
pair
of
channels
requires
that
both
channels receive
input,
you
need
to
connect
both
left
and
right
inputs
to
the
source
unit.
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 XD800/8v2's channels are
operating in bridged mode, the output will be in
mono (only one channel). This mono channel
can contain right channel only information,
left channel only information
or
the
sum
of
the information from
both
the right
and
left
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 XD800/8v2's
channels, use a "Y-Adaptor" to split the single
channel signal into
both
left
and
right RCA
inputs. This option
is
useful when using a
pair
of
the XD800/8v2's channels to drive left
channel speakers only
and
another pair
of
the
XD800/8v2's channels to drive right channel
speakers only.
2)
Left +
Right
Channel
Information:
When
bridged and fed by a stereo input, a pair
of
the XD800/8v2's channels will automatically
combine the left
and
right channels into a
summed
mono (left + right) channel. This
option
is
useful when using a pair
of
the
XD800/8v2's channels to drive a subwoofer
system or a
summed
mono center channel.
