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JL Audio J2 500.1

Mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms

Item # 136J25001

JL Audio's J2 amplifiers will electrify you with strong performance at an affordable price, as these high-powered...

Find what Fits your vehicle

JL Audio's J2 amplifiers will electrify you with strong performance at an affordable price, as these high-powered...

Discontinued item

Item # 136J25001

About the JL Audio J2 500.1

JL Audio's J2 amplifiers will electrify you with strong performance at an affordable price, as these high-powered amps transform your system with their superb sound quality. Oversized output transistors, extra-quiet input circuitry, and high-tech power supplies deliver strong, stable output and reliable performance. These amps are overbuilt and underrated, so you'll get the maximum clean power you'd expect from JL Audio.

JL Audio's J2 amplifiers will electrify you with strong performance at an affordable price, as these high-powered amps transform your system with their superb sound quality. Oversized output transistors, extra-quiet input circuitry, and high-tech power supplies deliver strong, stable output and reliable performance. These amps are overbuilt and underrated, so you'll get the maximum clean power you'd expect from JL Audio.

The J2 500.1 mono amp sends up to 500 watts RMS to your subwoofer system. The low-pass filter and bass boost allow you to get maximum bottom-end punch from your enclosure in your vehicle, while the included wired remote lets you tweak the amplifier's level from the comfort of your front seat.

Confused about impedance? Check out our article on matching subs and amps.

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Product highlights:

  • mono subwoofer amplifier
  • 340 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
  • Class B amplifier design
  • MOSFET switching power supply
  • frequency response: 10-100 Hz
  • variable low-pass filter (40-130 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • wired remote level control included
  • output polarity switch
  • preamp inputs and outputs
  • fuse rating: 15A x 4
  • 4-gauge power and ground leads and a 60-amp fuse recommended — wiring and hardware not included with amplifier
  • 14-1/4"W x 2-3/16"H x 9-5/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 99391

What's in the box:

  • Mono subwoofer amplifier
  • Eight 15 amp ATO fuses (4 installed)
  • Wired remote level control (14' cable attached)
  • 2mm Allen wrench
  • 2.5mm Allen wrench
  • 3mm Allen wrench
  • Four 3/4" Self-tapping screws
  • 4 Flat washers
  • Owner's manual

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Pros:

Cons:

Crutchfield response

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Features
Controls
Connections

Features

Mono Subwoofer Amplifier: The JL Audio J2 500.1 is a class B monoblock subwoofer amplifier rated at 340 watts RMS x 1 into a 4Ω load, 420 watts RMS x 1 into a 3Ω load, and 500 watts RMS x 1 into a 2Ω load.

Status LED: The LED changes color based on the amp's power status:

  • Red: the amplifier is turning on
  • Green: the amplifier is on and operating normally
  • Yellow: the protection mode has activated, indicating the amplifier has exceeded its safe operating temperature, the speaker outputs are shorted together, or the speaker impedance is too low

Controls

Active Crossover: The low-pass crossover is continuously variable from 40 Hz to 130 Hz and cannot be bypassed. The crossover slope is 12 dB/octave.

Bass Boost: The bass boost circuit is adjustable from 0 to +12 dB. The boost frequency is fixed at 45 Hz.

Remote Level Control: The 14' cable attached to the included Remote Level Control plugs into the 3.5mm jack on the left side of the amp. When the module is connected, you can control the subwoofer volume from the driver's seat. The remote is designed to mount under the dash and measures:

  • Width: 2.513"
  • Height: 1.026"
  • Depth: 1.656" (2.325" including cable and knob)

Polarity: A slide switch allows easy reversal of the output polarity (Normal/Reversed).

Connections

Power and Ground: The Power and Ground connections accept 4 gauge wire, which JL Audio recommends as the minimum size. The set-screw terminals are tightened/loosened using the included 3mm Allen wrench.

Remote Turn-On: The remote terminal will accept 10 to 18 gauge wire. The set-screw terminal is tightened/loosened using the included 2mm Allen wrench.

Speaker Outputs: The speaker's set-screw terminal will accept 8 to 16 gauge speaker wire; it's tightened/loosened using the included 2.5mm Allen wrench.

Preamp Inputs: The amplifier features one set of RCA line level inputs. The input sensitivity is adjustable from 200mV to 4V RMS.

Note: When using a single RCA input, JL Audio recommends using a Y adapter to feed a signal to both RCA jacks.

Preamp Outputs: There is a pair of preamp outputs so you can send audio to another amplifier in your system. The preamp output is not affected by the crossover or bass boost circuits.

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