Monoblock Class A/B Amplifier: The JL Audio JX250/1 is a
class A/B monoblock subwoofer amplifier that has been optimized for
low-frequency (20-150 Hz) amplification of connected subwoofers.
Note: The JX250/1 is not designed for driving full-range
speakers, midrange drivers, or tweeters.
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
(RMS) Power @ 12.5V
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 JX250/1'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 JX250/1 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 JX250/1 is equipped with a
RJ-11 connection for an optional wired 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
- Power and Ground: The JL Audio amplifier's set-screw
Power and Ground connections are designed to accept 8 to 4 AWG power wire. A
2.5mm hex-wrench is supplied for making connections.
- Remote Turn-On: The JL Audio JX series amplifier's set-screw
turn-on lead will accept 18 to 8 AWG wire. The same 2.5mm hex-wrench is
supplied for making connection.
Note: The Amplifier is not equipped with a fuse. An
external 30-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 30-amps, the original should be replaced with a 30-amp fuse
Speaker Output Terminals: The JL Audio JX250/1 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 making connections.
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 JX250/1 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 JX250/1 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 JX250/1 incorporates a pass-through
preamp output section, so that additional amplifiers can easily be connected to
the same signal(s) feeding the monoblock amplifier. These preamp output signals
are buffered to prevent noise and are always preamp level, regardless of the
level of signals feeding the amplifier's inputs.