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JL Audio 4-Channel Class D Full-Range 400W Amplifier - 98636

Abt Model: VX4004I | UPC: 699440986366
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JL Audio 4-Channel Class D Full-Range 400W Amplifier - 98636

Designed to simplify great audio, every VXi amplifier combines our advanced NexD2™ switching amplifier technology with an integrated, full-featured digital signal processor.

With our second-generation NexD2™ technology, the VX400/4i full-range amplifier outputs up to 75 watts per channel into 4 ohms, or 100 watts into 2 ohms. It can also be bridged into 4 ohms, producing up to 200 W x 2.

The NexD2™ full-range technology in this amplifier is DSP-controlled and features a reduced loop area design utilizing DirectFET™ outputs for outstanding fidelity, very low noise and exceptional efficiency. The amplifier chassis is ultra-compact, with all connections on one side, to greatly simplify installation into tight spaces.

Instead of traditional control knobs and switches, all amplifier adjustments and DSP functionality are configured via a compatible external device (PC, Tablet or Smartphone), with the appropriate JL Audio TüN™ Software application installed.

Amplifier includes: Power Connector (for 4 AWG wire), Analog Input/Pre-Out Harness, Speaker Output Harness, 6 ft A/B USB Cable


  • TüN™ Software Applications
    Intuitive setup and tuning, all at your fingertips. Automatically recognizes connected amplifier and displays appropriate interface. TüN™ is available for download for free in a variety of applications, for computers and most handheld devices.
  • Unprecedented, Onboard DSP Tuning Power
    • Premium, triple-core AKM® DSP with an optimized configuration, developed in collaboration with AKM®
    • Hi-Res audio processing at 24 bit/96 kHz
    • High-performance AKM® A/D and D/A converters
    • 10 Bands of fully parametric EQ, per output channel, including pre-outs
    • Shelving EQ option for Band 1 and Band 10
    • High-Pass & Low-Pass Filters for each output channel, with selectable alignments and slopes: 
      Linkwitz-Riley: 12, 24, 48 dB/octave
      Butterworth: 6, 12, 18, 24, 36, 48 dB/octave
    • Signal Delay in 0.01 millisecond steps (equivalent to 1/8-inch, 3 mm)
    • All-Pass Filter (Phase EQ), with variable "Q" and corner frequency
    • Polarity Reversal (0 or 180 deg.)
    • Output Level Trim in 0.1 dB steps
  • NexD2™ Switching Amplifier Technology
    • Our latest generation of high-speed switching technology delivers superb full-range power, fidelity and efficiency.
    • DSP acts as central clock for all channels to improve audio quality and reduce noise.
  • Ultra-Versatile Analog and Digital Inputs
    • High-performance, differential-balanced analog inputs for outstanding noise rejection
    • Accepts speaker level signals from 200 mV, up to 16V RMS, including those from many factory systems
    • Optical Digital (Toslink) input permits direct connection of S/PDIF digital sources, bypassing A/D converter. Accepts up to 24 bit/192 kHz input.
    • Independently configurable RCA analog and digital pre-outs (24 bit/96 kHz)
    • Automatic turn-on options via Signal-Sensing or DC-Offset sensing
  • Functional Compact Chassis Design
    • Solid cast alloy main unibody and bottom plate deliver superb EMI performance and shielding
    • All connections utilize compact mating connectors for maximum integrity and fitment into tight spaces.
    • Configurable LED logo ring displays status and can display audio preset color code or user-defined color
    • Logo badge can be oriented in 90 degree increments
    • Corner caps engineered to conceal mounting holes and hardware
  • JLid™ System Command and Control with Networking Capabilities
    JL Audio's digital protocol provides control interface and communication between VXi amplifiers and optional JLidTMaccessories, including:
    • DRC-100/DRC-200/DRC-205 (coming soon) Digital Remote Controllers: Offers convenient level and DSP preset control from the driver's seat.
    • VXi-BTC Bluetooth® Communicator (coming soon): Permits wireless configuration of VXi amplifiers using your compatible Apple® or Android® device.
    • VXi-HUB Optical Network Hub (coming soon): Provides network connectivity for up to five slave VXi amplifiers, allowing synchronization of DRC controllers and DSP presets. Up to two VXi-HUBs can be daisy-chained to network up to ten VXi amplifiers.


  • Rated Continuous (RMS) Power @ 14.4 V
    • @ 4 Ω 75 W RMS x 4
    • @ 2 Ω 100 W RMS x 4 Bridged
    • @ 4Ω 200 W RMS x 2
  • Rated Continuous (RMS) Power @ 12.5 V
    • @ 4 Ω 60 W RMS x 4
    • @ 2 Ω 90 W RMS x 4 Bridged
    • @ 4Ω 180 W RMS x 2
  • General
    • Frequency Response: 12 Hz - 24 kHz (+0, -1dB)
    • S/N Ratio, referred to highest rated power (Analog Inputs): 99 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
    • S/N Ratio, referred to 1 W (Analog Inputs): 80 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
    • S/N Ratio, referred to highest rated power (Digital Inputs): 101 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
    • S/N Ratio, referred to 1 W (Digital Inputs): 81 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
    • Damping Factor @ 4 Ω: >100 / 50 Hz
    • Damping Factor @ 2 Ω: >50 / 50 Hz
    • THD+N @ Rated Power: <1% @ 2 Ω per Ch.
    • Input Voltage Range @ RCA Inputs: 200 mV - 16 V RMS
    • Min.Copper Power / Ground Wire Gauge: 4 AWG wire
    • Fuse Rating: 40 A (AFS, AGU or MaxiFuse™)

Approximate Dimensions:

  • Height: 2.12"
  • Width: 9.02"
  • Depth: 6.62"

Approximate Weight:

  • Unit: 5 lbs
  • Shipping: 7 lbs
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Key Features
Advanced NexD2 Switching Amplifier Technology/ Full-Featured Digital Signal Processor/ Outputs Up To 75 Watts Into 4 Ohms/ Adjustments And DSP Functionality Are Configured Via A Compatible External Device/ 12 Hz - 24 kHz Frequency Response/ Grey Finish
More reasons to buy the JL Audio 4-Channel Class D Full-Range 400W Amplifier 98636 from Abt Electronics
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