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JL Audio XD400/4v2

400W RMS XDv2 Series Class-D 4-Channel Amplifier

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• 75 watts x 4 channel @ 4 ohms
• 100 watts x 4 channel @ 2 ohms
• Bridged: 200 watts x 2 channel @ 4 ohms
• Total RMS Power: 400 watts
• Class D 2 ohms Stable 4-Channel Amplifier

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JL Audio XD400/4v2 with Amplifier Wiring Kit

400W XDv2 Series 4-Channel Class D Full-Range Amplifier with High-Speed NexD Switching

(77)

$377.49

Product Highlights


• 75 watts x 4 channel @ 4 ohms
• 100 watts x 4 channel @ 2 ohms
• Bridged: 200 watts x 2 channel @ 4 ohms
• Total RMS Power: 400 watts
• Class D 2 ohms Stable 4-Channel Amplifier

Description


JL Audio brand icon

Authorized dealer

JL Audio XD400/4v2

JL Audio XD400/4v2 - XDv2 Series 4-Channel Class D Full-Range Amplifier

This potent 4-Channel amplifier employs JL Audio's high-speed NexD™ switching design to achieve unprecedented efficiency and amazing power output in an ultra-compact chassis. Don't let the small size fool you, though... this amplifier is capable of serious power, delivering a full 400W of continuous total power into a 2 ohm load (14.4V, 1% THD). Targeted specifically for an audiophile-grade four satellite system, the XD400/4v2 includes a variable mode low-pass/high-pass filter with a continuously variable cutoff frequency selection from 50-500 Hz. The XD400/4v2 also features the v2 Spec feature set, which consists of automatic turn-on capability (via signal sensing or DC-offset sensing), and a dual-range differential balanced input section able to handle a wide range of input voltage levels. With the addition of an HD-RLC remote level control (sold separately), you can control the volume of one or both channel pairs of the XD400/4v2 from the front of the vehicle. This amplifier features a black powder-coat finish and a gasketed, brushed aluminum cover for the controls.

Advanced Rollback Protection

JL Audio's signature Advanced Thermal Rollback protection system eliminates annoying thermal shutdown events to keep the music playing, even under the most demanding conditions. Should the amplifier reach an unsafe operating temperature, a special circuit rolls back peak power output, without changing gain, until the amplifier cools down to a safe operating temperature. The red "Thermal" LED will light to indicate this condition has been reached. Once the amplifier cools down, the circuit restores full peak power output and the red "Thermal" indicator reverts to its normal state. The operation of Advanced Rollback Protection is inaudible in most cases.


NexD Switching Technology

From the same minds that gave us the technology found in the 'Slash' amplifiers, JL Audio has taken the simple fixed PWM design approach and enhanced it with a very high switching frequency. Full-range NexD™ amplifiers and channels feature a variable, ultra-high speed version of the NexD™ technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with "feed-forward" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.

Product Details:

  • XD-v2 Series Class D 2 ohms Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 4 channel
    • 2 ohms: 100 watts x 4 channel
    • Bridged: 200 watts x 2 channel @ 4 ohms
  • Total power output: 400 watts
  • LED Power/Protect Light
  • Wired bass level remote control with optional JL Audio HD-RLC
  • Speaker-level (high-level) inputs (Requires adapter like the JL Audio XD-CLRAIC2-SW)
  • Signal sensing remote turn-on
  • Protection Circuitry with Status LED
  • NextD™ switching amp technology
  • Differential-balanced inputs help eliminate noise
  • Advanced Rollback Protection System prevents thermal shut-down
  • Speaker-level (high-level) inputs
  • Input sensitivity:
    • Low level: 200mV - 2 volts
    • High level: 800mV - 8 volts
  • Frequency Response: 12 - 22000 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ratio: >104 dB
  • Variable high-pass filter: 50 - 500 Hz
  • Variable low-pass filter: 50 - 500 Hz
  • Fuse Rating: 40A
  • 8 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 8-9/16" L x 7-1/8" W x 2-1/16" H
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty
  • MFR #: XD400/4V2
Check out the JL Audio XD400/4v2 Owner's Manual

Product history:

JL Audio XDM400/4 thumbnail
(newest, current model)
JL Audio XD400/4V2 thumbnail
(previous model, replaced by JL Audio XDM400/4)
JL Audio XD400/4 thumbnail
(previous model, replaced by JL Audio XD400/4v2)

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


Key Features
Amplifier Key Features
Speaker Level Inputs
Power Specifications - Full Range Channels
RMS Power @ 4 ohms
75 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Series
XD-v2 Series
Amplifier Class
D
Number of Channels
4-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
Frequency Response
12 - 22000 Hz
THD at Rated RMS Power
<1%
Speaker Level Inputs
Yes
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Signal-to-Noise Ratio
>104 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fuse Rating
40A x 1 
Total Fuse Rating
40
Strappable
No
Sonic Certified Amplifier
Yes
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
Low-Level Input Sensitivity
200mV - 2 volts
High-Level Input Sensitivity
800mV - 8 volts
What is in the box?
Paperwork
User manual
WITB: Amplifiers
Amplifier
Adhesive brand badge
Allen wrench
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

XD400/4V2

Weight:

5.97lbs

Internal SKU:

xd4004v2

Internal Product ID:

81602

Product and How-to Videos


Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4.7
Value
4.9
Features
4.9
Design
4.9
Usability
5

Customer Photos & Videos


Customer Reviews

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Great Sounding Amp

I love the quality of the sound that comes from this amp. I just wished I had the clipping light on this unit as it does on the RD400/4. The only reason I went with the XD400/4 over the RD400/4 is the signal to noise (dB) on the XD amp.
The XD series also comes with a 2 year warranty as opposed to a 1 year warranty on the RD series amps

By Dan on June 7, 2017

33

found this helpful.

Awesome little amp

Needed an amp to fit where the stock Monsoon amp was in a 4th gen f-body. This amp fit on the original amp bracket without any problem. Hooked up to two pairs of jl audio c2-650x coaxials it's the prefect amount of power.

By Andrew J. on February 25, 2018 Checkmark Icon Verified purchase

30

found this helpful.

Surprisingly powerful.

I’m impressed. I was running 3 separate amps to power 4 pair of JL speakers in my doors and one pair in the dash. I replaced them with this amp. Much cleaner looking and sounding. My subs are stronger because I’m drawing less power. My other amps were running warm and shutting down so I like that this has a cool down mode. Easy to hook up and install. The best terminals of any amp. Just ordered one more for my dash and will drive extra tweeters off the other channel. Never hurt to flash JL too.

By Anonymous on August 6, 2018 Checkmark Icon Verified purchase

28

found this helpful.

clean clean & clear

geese may i just inform you that this amp does not stop the sound quality it delivers is simply outstanding, thank you Sonic for making my music experience pleasurable.

By Anonymous on September 28, 2018 Checkmark Icon Verified purchase

26

found this helpful.

Two words... Sound Quality!

I was using a JP 4 channel amplifier prior to installing this. There was this annoying whining sounds when the volume was down. I checked all my grounds and even added a ground to make sure I was good. Sound never went away. I actually tried the class D JP 4 channel and the class AB JP 4 channel amplifiers, they both had that sound. I decided to stop being cheap and get an Amplifier from a reputable company. This amp provides all the power I need to my infinity kappa component sets . Sound is clean, clear, and crisp. Also, that annoying whining sound is gone. It's crazy how quality equipment just performs cheaper equipment in areas other that power. Power is cheap these days but quality of components is not. I was a JL guy back in the 90s but gave some of the cheaper products a shot. Ill put my money of the quality stuff... JL being one of them. Hopefully this review helps someone.

By Joshua on November 5, 2023 Checkmark Icon Verified purchase

17

found this helpful.

Amazing sound

Matched with JL audio c2 speakers this amp provides great crisp sound. The roll back feature is a cool feature that the amp will never shut off due to heat.

By Mark on February 12, 2024 Checkmark Icon Verified purchase

12

found this helpful.

By Gvona on February 16, 2024 Checkmark Icon Verified purchase

5

found this helpful.

Great súper amp !!!

By juan on January 14, 2024 Checkmark Icon Verified purchase

5

found this helpful.

By Jesus on March 16, 2024 Checkmark Icon Verified purchase

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