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JL Audio J2 250.1

Mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms

4 Reviews

Item # 136J22501

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Overview

Our take on the JL Audio J2 250.1

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 250.1 mono amp sends up to 250 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.

I'm using speaker level inputs and the amp sounds good. With an aftermarket reciever, this amp will sound great!

AllenT, Tifton, GA

What's in the Box:

  • Mono subwoofer amplifier
  • Two 30 amp ATO fuses (1 installed)
  • Wired remote level control (14' cable attached)
  • 2mm Allen wrench
  • 2.5mm Allen wrench
  • 3mm Allen wrench
  • 10" Speaker input harness
  • Four 3/4" Self-tapping screws
  • 4 Flat washers
  • Owner's manual

Product Highlights:

  • mono subwoofer amplifier
  • 175 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms)
  • Class AB amplifier design
  • MOSFET switching power supply
  • frequency response: 10 Hz - 100 Hz
  • variable low-pass filter (60-240 Hz, 12 dB/octave)
  • variable bass boost (0-9 dB at 45 Hz)
  • wired remote level control included
  • preamp inputs and outputs
  • speaker-level inputs
  • fuse rating: 30A x 1
  • 8-gauge power and ground leads and a 30-amp fuse recommended — wiring and hardware not included with amplifier
  • 10-5/8"W x 2-3/16"H x 9-5/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews

JL Audio J2 250.1 Reviews

Average Customer Review(s):

(4 Reviews)
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Details

Hands-on research

Product Research

Features
Controls
Connections

Features

Mono Subwoofer Amplifier: The JL Audio J2 250.1 is a class A/B monoblock subwoofer amplifier rated at 175 watts RMS x 1 into a 4Ω load, 210 watts RMS x 1 into a 3Ω load, and 250 watts RMS x 1 into a 2Ω load.

Status Indicator Lights: There are two lights on the left side of the amplifier:

  • Power: green LED indicates the amplifier is turned on and operating normally
  • Protect: red LED indicates the amplifier has exceeded its safe operating temperature or detected a short in the speaker outputs

Controls

Active Crossover: The low-pass crossover is continuously variable from 60 Hz to 240 Hz and cannot be bypassed. The crossover slope is 12 dB/octave.

Bass Boost: The bass boost circuit is adjustable from 0 to +9 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)

Connections

Power and Ground: The Power and Ground connections accept 4 to 8 gauge wire; JL Audio recommends 8 gauge 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 two speaker terminals are internally wired in parallel for easy connection of two subwoofers (2Ω minimum when using one sub, 4Ω minimum when using two subs). The set-screw terminals are tightened/loosened using the included 2.5mm Allen wrench and will accept 8 to 16 gauge speaker wire.

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.

Speaker Inputs: When connecting the amp to a head unit without line level outputs, use the included speaker level input harness. In this case the input sensitivity is adjustable from 630mV to 20.5V RMS.

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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