Monoblock Amplifier: The JL Audio JX500/1D monoblock subwoofer
amplifier that has been optimized for low-frequency (10-150 Hz) amplification of
Note: The JX500/1D is not designed for driving full-range
speakers, midrange drivers, or tweeters.
Class D Amplifier Circuit: The JX500/1D employs an advanced Class D
switching design that allows it to produce 500 watts of clean subwoofer power
while drawing significantly less current from your electrical system and
generating less heat than a conventional Class A/B or Class B design.
MOSFET Switching Power Supply: The JL Audio JX series monoblock
amplifier employs a rugged MOSFET power supply for outstanding reliability and
(RMS) Power @ 14.4V
(10-150Hz, 90dB S/N, 1% THD+N)
(RMS) Power @ 12.5V
(10-150Hz, 90dB S/N, 1% THD+N)
High-Mass Heat Sink: A heavy extruded aluminum heat sink is designed
to keep the JL Audio JX series amplifier in a comfortable thermal range during
demanding operation. This high-mass, extruded heat sink removes heat from the
amplifier circuitry, extending high-power operation. This improves reliability
and reduces the frequency of thermally related shut-down event.
Protection Circuitry: The JX500/1D's protection circuitry automatically
shuts the amplifier down if thermal limits are exceeded, a short-circuit is
detected in the speaker wiring, or if low supply voltage limits are reached.
Status Indicator Lights: There are two status indicator
lights on the right side of the amplifier.
- Power (Green): This LED lights green to indicate that
the amplifier is turned on and operating normally.
- Protect (Red): The Protection LED lights red to
indicate the amplifier's protection circuitry has been activated to prevent
product failure due to thermal overload, a short-circuit, or a dangerously
low impedance connected to the amplifier's outputs.
Input Sensitivity: The Input Sensitivity Control is used to
match your source unit's output voltage to the input stage of the amplifier for
maximum clean output:
- Low-Level Input Range: 200mV-4V (RMS)
- High-Level Input Range: 2V-10V (RMS)
Low Pass Crossover: The JL Audio JX500/1D monoblock amplifier
is equipped with a 12dB/octave Butterworth low-pass filter with variable frequency
selection from 50 to 200Hz.
Bass Boost: The amplifier is equipped with a variable 0 to
+12dB, 45Hz Bass Boost.
Remote Level Control: The JX500/1D is equipped with an
RJ-25 connection for an optional wired
RBC-1 Remote Level Control
(sold separately) that allows volume level adjustment of the amplifier from the
front of your vehicle.
Power/Ground/Turn-On Terminals: The monoblock amplifier
features set-screw terminals for the power, ground, and remote turn-on
connections. A 2.5mm hex-wrench is supplied for tightening/loosening the
- Power and Ground: The JL Audio amplifier's set-screw
Power and Ground connections are designed to accept 8 to 4 AWG power wire.
- Remote Turn-On: The JL Audio JX series amplifier's set-screw
turn-on lead will accept 18 to 8 AWG wire.
Note: The amplifier is not equipped with a fuse. An
external 50-amp AFS, AGU, or MAXI fuse (not included) must be installed on
the power wire. If a wiring kit is used which includes a fuse with a value
other than 50-amps, the original should be replaced with a 50-amp fuse.
Speaker Output Terminals: The JL Audio JX500/1D features four
set-screw speaker terminals for an easy parallel subwoofer connection. The
monoblock amplifier's four set-screw speaker terminals will accept 16 to 8 AWG
speaker wire. A 2.5mm hex-wrench is supplied for tightening/loosening the
Preamp Inputs: The monoblock amplifier features one set of
stereo RCA input jacks. The amplifier features a dedicated Input Sensitivity
gain control for these inputs. These controls are designed to match the input
sensitivity of the JX500/1D to the specific signal source that is feeding it. The
amplifier's low-level input can be set between 200mV-4V RMS.
Speaker Level Inputs: The JL Audio JX500/1D also accepts speaker level
signals, including those from factory systems (without the need for a
line-output converter), via the supplied 10" speaker-level harness. The
amplifier's high-level input can be set between 2V-10V RMS.
Preamp Outputs: The JX500/1D incorporates a pass-through
preamp output sections, so that additional amplifiers can easily be connected to
the same signal feeding the monoblock amplifier. The preamp output signal is
buffered to prevent noise.