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JL Audio VX400/4i (Open-Box, Like New)

400W RMS VXi Series Class D 4-Channel Amplifier with Built-In DSP

JL Audio
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• 75 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• 200 Watts RMS x 2 @ 4 ohm, Bridged
• Built-In Digital Signal Processor
• Adjustments Controlled Through TüN App
• Chassis Hides Mounting Hardware
• Dimensions: 9.02" W x 6.62" L x 2.12" H

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Description


JL Audio brand icon

Authorized dealer

JL Audio
VXi Series Amplifiers


JL Audio VX400/4i 4-Channel Amplifier with Built In Digital Signal Processor (DSP)

JL Audio's VX400/4i Amplifier

Sometimes, beauty's only skin deep and other times, it's what's on the inside that counts. But when you find something gorgeous inside and out, you never pass it up. JL Audio's brand new VXi amplifiers are designed not with a balance of beauty and function, but an abundance of both. You get amazing sound and looks.

JL Audio's VX400/4i 4-Channel Amplifier mixes beauty and function

The VX400/4i 4-channel amplifier has a built in Digital Signal Processor (DSP). Instead of concealing the controls behind a metal plate, all the tuning is right at your fingertips. Just connect with the free TüN app.

Once your installation is finished, you can tune from anywhere, and you can change your settings without getting out the tool kit. Adjust the parametric EQs on each channel, the gain and more through a phone, tablet or computer.

But who says looks don't matter? JL Audio placed all the connections on the VXi amps on one side, cleaning up every installation. The chassis hides all the mounting hardware. The logo badge rotates in 90-degree increments, depending on how you need to mount it, and you can change the LED backlight color to match your system. What are you waiting for? Get your VX400/4i now and hit Add to Cart!

JL Audio VX400/4i 4-Channel Amplifier has all the connections on one side.

General Features:

  • JL Audio VXi Series VX400/4i
  • Class-D Full Range 2 ohm Stable 4-Channel Amplifier
  • RMS Power Rating (14.4V):
    • 4 ohm: 75 watts x 4 chan.
    • 2 ohm: 100 watts x 4 chan.
    • Bridged, 4 ohm: 200 watts x 2 chan.
  • Unmatched built-in DSP functionality:
    • Premium, triple-core AKM DSP with an optimized configuration
    • Hi-Res audio processing at 24 bit/96 kHz
    • High-performance AKM A/D and D/A converters
    • 10 Bands of parametric EQ per channel, including pre-outs
    • Shelving EQ option for Bands 1 and 10
    • High and Low-Pass Filters for each 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
    • 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
  • All adjustments performed through the free TüN app on a computer, smart phone or tablet
  • Add more functionality with the JL Audio JL Audio VXi-BTC and JL Audio VXi-HUB
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Soft start turn-on
  • 4/3/2 channel operation
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Dual speaker terminals simplify the hookup of multiple speakers
  • Heavy duty aluminum alloy heat-sink
  • Input sensitivity: 200mV - 16V
  • Frequency Response: 12 - 24000 Hz
  • Total Harmonic Distortion (THD): <1% @ 2 ohm/channel
  • Signal to Noise Ratio: 99 dB
  • Variable high-pass and low-pass filters on each channel
  • Fuse Rating: 40A x 1
  • 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. Click Here for our contact information.
  • Dimensions: 9.02"W x 6.62"L x 2.12"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
Check out the VX400/4i Owner's Manual

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Specifications & Details


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
VXi 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 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
.1%
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Remote bass/level controller
No
Fuse Rating
40A x 1 
Total Fuse Rating
40
Strappable
No
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
No
Hi-Res Certified
Yes
What is in the box?
Paperwork
User manual
WITB: Amplifiers
Amplifier
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

VX400/4i (Open-Box, Damaged Packaging)

Weight:

8.30lbs

Internal SKU:

vx4004i_obc8

Internal Product ID:

194653

Customer Ratings & Reviews


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.