channels. In order to achieve one of these options,
configure the inputs 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 the e2150, use a “Y-Adaptor” to
split the single channel signal into both left and right
RCA inputs (or parallel-connect both positive and
both negative high-level input connections to a
single channel source signal).This option is useful
when using one e2150 to drive the left channel
speakers only and another e2150 to drive right
channel speakers only.
When parallel-connecting both positive and both
negative high-level input connections as described
above, make sure to connect negative (–) wires to
negative (–) wires and positive (+) wires to
possitive (+) wires.
2) Left + Right Channel Information: When
bridged and fed by a stereo input, the e2150 will
automatically combine the left and right channels
into a summed mono (left + right) channel.This
option is useful when using the e2150 to drive a
subwoofer system or a summed mono
center channel.
AMPLIFIER STATUS INDICATOR LIGHTS /
PROTECTION CIRCUITRY
There are two status indicator lights on the
input / control end of the amplifier:
1) “Power” (Green): lights to indicate that the
amplifier is turned on and operating normally.
2) “Protect” (Red): lights or flashes to indicate
that the amplifier protection circuitry has been
activated to prevent product failure.
a) If the red “Protect” indicator lights steadily
(without flashing), the amplifier has exceeded its safe
operating temperature.This causes the amplifier to
shut off in order to protect its circuitry. When the
amplifier’s temperature drops to a safe level, the red
“Protect” indicator will shut off and the amplifier
will return to normal operation.
b) If the red “Protect” indicator flashes
intermittently, the protection circuitry has detected a
short-circuit or a dangerously low impedance
connected to the amplifier output(s). Connecting
the speaker outputs to an impedance lower than
2Ω stereo (4Ω bridged) will cause this protection
mode to activate.The amplifier’s output may cycle
on and off when this protection mode is activated.
When the problem is eliminated, the amplifier will
return to normal operation.
SERVICING YOUR JL AUDIO AMPLIFIER
If your amplifier fails or malfunctions, please
return it to your authorized JL Audio dealer so
that it may be sent in to JL Audio for service.
There are no user serviceable parts or fuses
inside the amplifier.The unique nature of the
circuitry in the JL Audio amplifiers requires
specifically trained service personnel. Do not
attempt to service the amplifier yourself or
through unauthorized repair facilities.This will not
only void the warranty, but may result in the
creation of more problems within the amplifier.
If you have any questions about the installation or
setup of the amplifier not covered in
this manual, please contact your dealer or the
JL AUDIO Technical Department for assistance:
(954) 443-1100
9:00 AM – 5:30 PM Eastern Time,
Monday – Friday
JL AUDIO e2150 9
PRE-OUTS
The e2150’s “Pre-Outs” connectors output
unprocessed (pass-through) left and right channel
preamp level signals, permitting connection of
additional amplifiers in a system.
When using either the line level inputs (RCA
input connections) or the “High Level Inputs”
(four-pin connector), the output signals are identical
to the input signals. If the “High Level Inputs” are
used, the signal present at the “Pre-Outs” can still
be sent to another JL Audio amplifier. In either case,
the “Pre-Outs” signals are not affected by any
settings in the “Amplifier Controls” or “Bass
Boost Controls” sections.
SPEAKER OUTPUTS
The e2150’s speaker outputs are designed to
accept 8 AWG - 16 AWG wire.
The e2150 is designed to deliver power into
speaker loads equal to or greater than 2Ω when
using a “stereo” configuration and speaker loads
equal to or greater than 4Ω when using a
“bridged” configuration.
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.
Speaker loads below 2Ω nominal per channel
are not recommended and may cause the amplifier
to initiate a protection mode and shut itself off.
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 e2150 has been designed for bridging
of its two channels without the need for input
inversion adaptors.
To bridge the e2150’s two channels, use the
“Ch1 +” and “Ch2 –” speaker connectors only
(the “Ch1 –” and “Ch2 +” remain unused).When
bridged, the e2150 will deliver optimum power into
a 4Ω load.
When bridged, the e2150 will deliver 150W x 1
into a 4Ω load or 90W x 1 into an 8Ω load.
Operating a bridged e2150 into a load lower than
4Ω 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 the e2150 is 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
