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  5. JL Audio JX400/4D

JL Audio JX400/4D

400W RMS JX Series 4-Channel Class D Full-Range Amplifier

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• Peak: 70W x 4 @ 4 ohms, 100W x 4 @ 2 ohms, 200W x 2 @ 4 ohms Bridged
• Unregulated PWM switching type power supply
• Class D Circuitry
• Defeatable 12 dB / octave filter
• Speaker-level (high-level) inputs with included harness
• Dimensions: 7.68"W x 9.05"L x 2.09"H

Learn more about the jx4004d

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

rd4004 thumbnail

JL Audio RD400/4

OUR PRICE: $379.99

View item

Product Highlights

• Peak: 70W x 4 @ 4 ohms, 100W x 4 @ 2 ohms, 200W x 2 @ 4 ohms Bridged
• Unregulated PWM switching type power supply
• Class D Circuitry
• Defeatable 12 dB / octave filter
• Speaker-level (high-level) inputs with included harness
• Dimensions: 7.68"W x 9.05"L x 2.09"H

Description

JL Audio

Authorized dealer

JL Audio JX400/4D

JL Audio JX400/4D - JX Series 4-Channel Class D Full-Range Amplifier

The JL Audio JX Series of amplifiers are designed with a specific purpose; to deliver clean, rock-solid performance and reliability at an affordable price. The JL Audio JX400/4D is a four-channel, full-range audio amplifier utilizing Class D technology that can be operated with a wide variety of source units and system configurations. Unlike gimmicky price-conscious amplifiers, JL Audio employs specified oversized output transistors and rugged MOSFET power supplies to unsure proper current, thermal capacity and better overall performance. In addition, the JX400/4D includes flexible signal processing capabilities with a fully variable 12 dB/octave crossover filter, pass-through preamp outputs and high-level inputs.

Integration Flexibility

Integration Flexibility

For those systems that do not offer a preamp level signal option, you can connect speaker level signals directly to the “Hi-Level Inputs” connector using the supplied connector and wire harness. Simply splice the appropriate left/right and positive/negative wires to the included harness and plug the harness into the “Hi-Level Inputs” connector on the amplifier. The JX monoblock will attenuate the high-level signal to make it compatible with its input stage. Alternatively, a traditional left/ right pair of RCA type jacks is used for preamp level (low-level) signals. This is the preferred connection method whenever available.

Low-Pass Active Filter

Selectable 12 dB / octave filter

The JX class D full-range amplifier features a defeatable 12 dB / octave filter, which can be configured as a low-pass or high-pass filter and offers continuously variable cutoff frequency selection from 50-200 Hz. This feature is designed to attenuate frequencies above or below its filter frequency, so that the system’s speakers do not reproduce any audible and often harmful frequencies. 80 Hz is a good starting point for system tuning, but its also advisable to match the crossover point with that of your subwoofer's low-pass filter - this ensures that your system is properly distributing the frequencies to the appropriate medium.



General Features:

  • JX Series 4-Channel Class D Subwoofer Amplifier
  • RMS Power Rating (14.4V):
    • 4 ohms: 70 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • RMS Power Rating (12.5V):
    • 4 ohms: 50 watts x 4 chan.
    • 2 ohms: 80 watts x 4 chan.
    • Bridged, 4 ohms: 160 watts x 2 chan.
  • Unregulated PWM switching type power supply
  • LED power (green) and protect (red) indicators
  • Soft start turn-on prevent clicking and popping when system turns on
  • Speaker-level (high-level) inputs with included harness
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heatsink for effective heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Selectable input mode: 2 Ch. / 4 Ch.
  • Input sensitivity:
    • Low level input: 200mV - 4V
    • High level input: 2.0mV - 10.0V
  • Selectable filter mode: HP / Off / LP
  • Variable cutoff filter: 50 - 200 Hz, 12 dB/octave
  • Frequency Response: 20 - 20,000 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ratio: >93 dB
  • Damping Factor @ 4 ohms: >60 @ 4 ohms
  • Fuse Rating: 40A x 1 inline (not supplied)
  • 4 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
  • Weight: 4.80 lb
  • Dimensions: 7.68"W x 9.05"L x 2.09"H
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty


Check out the JL Audio JX400/4D Owner's Manual

Product history:

JL Audio RD400/4 thumbnail
(newest, current model)
JL Audio JX400/4D thumbnail
(previous model, replaced by JL Audio RD400/4)
JL Audio JX360/4 thumbnail
(previous model, replaced by JL Audio JX400/4D)

This item is currently not eligible for our low price guarantee. This may be due to supply constraints, manufacturer restrictions, or another reason. We're always here to help you get the best price possible so give us a call or email today. Our experts will do their best to build the system that works for you within the rules.

Specifications & Details

Power Specifications - Full Range Channels
RMS Power @ 4 ohms
70 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Series
JX Series
Amplifier Class
D
Number of Channels
4-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
<1%
Speaker Level Inputs
Yes - with included adapter
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 200 Hz
Low-Pass Crossover Frequency
50 - 200 Hz
Signal-to-Noise Ratio
>93 dB
Remote bass/level controller
No
Strappable
No
Sonic Certified Amplifier
Not Tested
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details

Manufacturer:

JL Audio

Model Number:

JX400/4D

Weight:

5.80lbs

Internal SKU:

jx4004d

Internal Product ID:

93399

Product and How-to Videos

Customer Ratings & Reviews

JL Audio JX400/4D
3
Rate or review product
5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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The Best Amp for the money

Bought this Amp because my brother has one and I'm familiar with the name and product . I paired it with component JBL speakers and it sounds incredible. Only downside is a little Engine noise that I need to filter out . Amp has a lot of power !

By Keith on June 16, 2015

13

found this helpful.
Helpful? Report abuse

Excellent Amp

Love this amp so much that I am buying another. Put one in girlfriends car and now ordered another for son car. Love all JL product , installed a XD 5 channel series in my car.

By Ray on October 15, 2017 checkmarkIcon Verified purchase

5

found this helpful.
Helpful? Report abuse

Lots of Power for little $$

JL Audio did it again with the JX400. Small size and cost yet BIG power. I have this amp running my 2 sets of Kicker Components and they are rocking!

By Anonymous on September 3, 2019 checkmarkIcon Verified purchase

4

found this helpful.
Helpful? Report abuse

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