JL Audio VXi VX400/4i 400W 4 Channel Class D High End Integrated DSP Speaker and Subwoofer Amplifier

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
• 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 low frequency power and efficiency.
• Specially optimized for subwoofer applications

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 JLid™ accessories, 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 Specifications

• 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™)

Physical Specifications

• Height (H) 2.12 in / 54 mm
• Width (W) 9.02 in / 229 mm
• Depth (D) 6.62 in / 168 mm
• Net Weight 5.0 lb / 2.27 kg