JL Audio VX400/4i

$1,199.99

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SKU: VX400/4i Categories: , , Brand:

Description

Amplifier plus DSP

We heardย a lot of pre-launch buzzing about JL Audio’s VXi Series amplifiers, which combine JL Audio’s latest amplifier technology with powerful signal processing. JL Audio teamed up with micro-device maker AKMโ„ข to create this customized processor-amp hybrid. They also improved the amp’s Class D performance by shortening the signal path through the amp, placing the output capacitor banks nearer the outputs, and using up-to-date DirectFETยฎ MOSFET output devices, resulting in higher efficiency, reliability, and audio quality.

75 watts RMS by four channels

The VX400/4i 4-channel amplifier puts out 75 watts RMS per channel and features 6 channels of digital signal processing. It can power the front and rear speakers in your car, and provide a processed signal for a separate subwoofer amplifier. You could also use this amplifier in bridged, 2-channel mode to power a couple of high-performance speakers or subwoofers with 200 watts RMS each.

Digital accuracy

The 24-bit 96 kHz processing for each channel includes signal routing and mixing, 10-band parametric EQ, time-alignment, high- and low-pass filters, and output level control with 0.1 dB precision. In addition to tuning the audio signal, the processor provides a master clock signal for the Class D amplification, increasing audio accuracy.

Remote control only

You make all your settings and adjustments from your compatible device running JL Audio’s TรผNโ„ข software.

  • PC and Mac OS: TรผN 3.0 โ€” requires a USB connection (6′ cable included with amp)
  • Android and iOS tablets: TรผN Mobile โ€” requires Bluetooth connection and theย VXi-BTCย Bluetooth communicator (sold separately)
  • Android phones and Apple iPhones: TรผN Express (for Basic setups only) โ€” requires Bluetooth connection and theย VXi-BTCย Bluetooth communicator (sold separately)

Other accessories you may want with this amp

This VXi amplifier features JLidโ„ข inter-device connection ports for JL Audio’s proprietary network system for controlling data. Theย DRC-205ย digital remote control lets you adjust the master volume, subwoofer level, switch between up to six preset tunings, and indicates the amp’s status via LED. An optionalย VXi-HUBย network hub comes in handy when you have three or more VXi amps in your system, coordinating all the adjustments and controls. Aย FiX 82ย or aย FiX 86ย can be used to remove factory sound processing, for higher-fidelity factory system integration for your VXi amplifier.

JL Audio VX400/4iVX400/4i connection panel

READ LESS

Product highlights:

  • 4-channel car amplifier
  • 75 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 200 watts RMS x 2 bridged at 4 ohms
  • Class D amplifier design with NexD2โ„ข switching amp technology
Digital Signal Processing:
  • 24-bit 96 kHz digital processing
  • DSP adjustments and settings made via computer, tablet, or smartphone running JL Audio’s TรผN app via USB, via Bluetooth (tablets and phones) with BTC Bluetooth option
  • 3 Project Levels of tuning: Basic, Advanced, Expert
  • input routing and mixing
  • adjustable gain controls with clip indication
  • fully adjustable high-pass, low-pass, and bandpass filters
    • selectable filter slopes (6, 12, 18, 24, 30, 36, 42, 48 dB/octave)
  • 10-band EQ (graphic in Basic, parametric in Advanced and Expert modes)
  • phase and polarity control
  • time alignment in 0.01 ms (1/8″) increments
Connection Features
  • differential-balanced inputs eliminate noise coming from your vehicle’s electrical system
  • preamp and speaker-level inputs (speaker wire to RCA adapterย required for speaker-level input)
    • high-level inputs โ€” up to 16 volts RMS (about 60 watts)
    • DC offset or signal sensing auto turn-on eliminates the need for remote lead
  • 2-channel digital input and output (S/PDIF: up to 24-bit 192 kHz in, 24-bit 96 kHz out)
  • 2-channel analog preamp output (4V RMS)
  • JLidโ„ข connections for optionalย Network Hub,ย Bluetooth Communicator, andย Digital Remote Control
  • USB connection for device running TรผN app (6-foot cable included)
  • wiring, fuse, and hardware not included with amplifier
    • 4-gauge power and ground leads and a 40-amp fuse recommended
  • 9-1/16″W x 2-1/8″H x 6-11/16″D
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 98636

What’s in the box:

JL Audio VX400/4i owner’s manual

  • 4-Channel amplifier
  • Power connector
  • 14″ Analog Input harness (15-pin D-Sub/6 RCA)
  • 18″ ABCD Speaker output harness
  • 6′ USB cable (Type A USB on one end and Type B USB on other end)
  • 4 Corner caps
  • Corner cap tool
  • 2 Silver thumbscrews
  • 2 Black hex cap machine screws
  • 2.5mm Hex wrench
  • 3mm Hex wrench
  • JL Audio logo badge
  • Connection Guide
  • Registration card

Product Research

Features
Digital Signal Processing
Connections
Specifications

Features

VXi Amplifiers:ย The JL Audio VXi-series of amplifiers feature advanced technology with built-in digital signal processors. These compact amplifiers pack a lot of power into a small package. Each VXi amplifier is equipped with a customized, triple-core AKM DSP that allows you to tune the amplifier to the exact performance you need. With JL Audio’s free TรผN software on your computer, tablet, or smartphone, you can configure the amplifier from the driver’s seat. Up to six active preset tunings can be stored.

4-channel Amplifier:ย The VX400/4i 4-channel Class D amplifier that has been optimized for full-range amplification of connected speakers. It has advanced NexD2 switching amplifier technology to deliver solid performance with high fidelity and efficiency. The amp does not have traditional control knobs and switches for setting up the amplifier. Instead, the input sensitivity, crossover, and polarity settings are configured via the TรผN software.

Logo Badge:ย The included JL Audio logo badge is included in the box, unattached. The badge has an adhesive backing for attaching it according to your installation in any 90ยฐ increment. The color of the LED ring around the logo badge can be configured in the TรผN software to display the amp’s status, audio preset, or a user-defined color.

Digital Signal Processing

AKM DSP: JL Audio’s AKM Digital Signal Processing engine, when partnered with the TรผN software, gives you an enormous amount of control over the configuration and settings of the amplifier. It is equipped with high-performance AKM A/D and D/A converters, and audio processing for high-resolution 24-bit/96kHz audio files. For some VXi models, the DSP offers a 10-band parametric EQ for each output channel, including pre-outs, Linkwitz-Riley and Butterworth high-pass and low-pass filters, Signal Delay (0.01-millisecond steps), polarity reversal, and output trim levels (in 0.1dB steps).

TรผN Software:ย The free TรผN software lets you configure, tune, and control your VXi amplifier from your PC, tablet, or smartphone. The TรผN software is available for Windows PC (Windows 7 SP1, 8.1, and 10 / 32-bit or 64-bit) and Apple computers. TรผN Mobile is available for iPad and Android tablets, while TรผN Express works with iPhone and Android smartphones. The apps are compatible with iOS version 10.0 or later, and Android 4.4 and up. When connected to the VX400/4i, you can make the following adjustments and settings on the application:

  • Input Selection:ย Analog or Digital
  • Turn-on Mode:ย Remote, DC offset, Signal Sense
  • Input Mode:ย 2 Ch / 4 Ch
  • Independent Settings for CH 1&2 and CH 3&4:
    • Input Type:ย Stereo or Mono
    • High Pass Filter:ย Off, 12dB, or 24dB; Cutoff frequency: 20Hz (or LPF frequency) to 20,000Hz
    • Low-pass Filter:ย Off, 12dB, or 24dB; Cutoff frequency: 20Hz to 20,000Hz (or HPF frequency)
    • Level Setting:
      • Input Level:ย Min to 11
      • Output Trim:ย -18.0dB to +12.0dB
    • Mute All:ย On/Off

Power Output:ย The VX400/4i power specifications are as follows:

Ohms Watts
Rated Continuous Power @ 14.4V
(<1% THD+N)		 4ฮฉ 75 x 4
2ฮฉ 100 x 4
4ฮฉ bridged 200 x 2
Rated Continuous Power @ 12.5V
(<1% THD+N)		 4ฮฉ 60 x 4
2ฮฉ 90 x 4
4ฮฉ bridged 180 x 2

Connections

Power/Ground/Turn-On Terminals:ย The VX400/4i features a removable plug with C-Clamp terminals for the power, ground, and remote turn-on cables. This allows you to pre-connect the wires to the connector, then plug it into the amplifier. The power connector will accept up to 4-gauge power and ground wire, and 10-18-gauge wire for the remote turn-on. The supplied 3mm and 2.5mm hex wrenches are for tightening/loosening the C-Clamps.

Note:ย The amplifier is not equipped with a fuse. An external 40-amp AFS, AGU, or MAXI fuse (not included) must be installed on the power wire. If a wiring kit is used which includes a fuse with a value other than 40-amps, the original should be replaced with a 40-amp fuse.

Speaker Output Harness:ย The JL Audio VX400/4i features a removable ABCD Speaker Output Harness with 18″ wires.

Analog Input Harness:ย The amplifier has a 15-pin D-Sub connection for the supplied 14″ Analog Input harness. Four loom-covered cables exit the cable’s D-Sub connector, with two pairs of stereo female RCA inputs, stereo female RCA preamp outputs (4V max output), the remote turn-on output (+12V) and Valet Preset Toggle lead.

Digital Inputs/Outputs:ย The amp has optical digital (Toslink) inputs for direct connection of S/PDIF digital sources, bypassing the A/D converter. The input accepts up to 24-bit/192kHz signals. There is also a Toslink optical digital output for sending a digital signal (24-bit/96kHz) to another VXi amplifier.

USB:ย A Type B USB port is provided for connecting the amp to your computer for interfacing with the TรผN software. A 6′ Type A to USB-B cable is provided.

RJ-45:ย Two RJ-45 modular ports are provided on the amplifier for optional accessories:

  • JLid-COMM:ย One RJ-45 port, labeled JLid-COMM, is for the optionalย VXi-BTCย Bluetooth Communicator (for wireless communication with Apple or Android smartphones and tablets), or the optionalย VXi-HUBย Optical Network Hub (for connecting up to five slave VXi amplifiers — ten with two VXi-HUBs, allowing synchronization of controllers and DSP presets).
  • JLid-CTRL:ย The other RJ-45 port, labeled JLid-CTRL, is for the optional Digital Remote Controller (DRC) connection. The optionalย DRC-205ย digital remote control allows you to conveniently set amplifier levels and DSP presets from the front of the vehicle.

microSD:ย A microSD port is provided on the front of the amplifier for future expansion.

Specifications

  • Frequency Response:ย 12 Hz – 24 kHz (+0, -1dB)
  • Input Voltage Range (at RCA inputs):ย 200mV – 16V RMS
  • Signal-to-Noise Ratio:
    • Analog Inputs (20Hz – 20kHz noise bandwidth):ย 99dB (rated power); 80dB (1 W)
    • Digital Inputs (20Hz – 20kHz noise bandwidth):ย 101dB (rated power); 81dB (1 W)
  • Damping Factor:ย >100dB / 50 Hz @ 4ฮฉ; >50dB / 50 Hz @ 2ฮฉ
  • Standby Current Draw:ย 2.3 mA
  • Dimensions (WxHxD):ย 9.02″ x 2.1″ x 6.686″
  • Weight:ย 5.0 pounds

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