Overview
4 Ch. Class D Full-Range Amplifier with Integrated DSP, 400 W
JL Audio VX400/4i
4-Channel Class D Full-Range Amplifier with Integrated DSP, 100 W x 4 @ 2 Ω / 75 W x 4 @ 4 Ω - 14.4V
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
What's in the Box?
| ⬥ (1) Amplifier |
| ⬥ (1) Analog Input/Pre-Out Harness |
| ⬥ (1) JL Audio Badge |
| ⬥ (1) USB A/B Cable (6ft./1.8 m) |
| ⬥ (2) Black Hex Cap Machine Screws |
| ⬥ (2) Silver Thumbscrews |
| ⬥ (1) Connection Guide |
| ⬥ (1) Power Connector |
| ⬥ (1) Speaker Output Harness |
| ⬥ (4) Corner Caps |
| ⬥ (1) Corner Cap Tool |
| ⬥ (1) 2.5 mm Hex Wrench |
| ⬥ (1) 3 mm Hex Wrench |
Features:
Unprecedented, Onboard DSP Tuning Power!
- Powerful DSP permits optimizing each channel’s timing, frequency response and output levels, for exceptional sound quality.
- TüN™ Software delivers fast and easy setup, at your fingertips. Make all adjustments with a clear interface. Free TüN™ software is available for computers and most handheld devices.
2nd-Gen NexD2™ Switching Amplifier Technology
- Advanced, high-speed switching technology delivers reference-grade power and efficiency.
- DSP-synchronized power supply and output channels produce world-class sound quality with very low noise and distortion.
Ultra-Versatile Analog and Digital Inputs/Outputs
- Differential-Balanced Analog Inputs accept speaker level signals up to 16V RMS, including those from factory systems. Delivers outstanding noise rejection to prevent alternator whine and other noises.
- Optical Digital (Toslink) Inputs permit direct connection of S/PDIF digital sources, bypassing A/D converter. Accepts up to 24 bit/192 kHz input.
- Analog and Digital Pre-Outs (pass-through or fully configurable): RCA Pre-Outs (4V RMS Max) and Optical (Toslink) Output at 24 bit/96 kHz
- Automatic turn-on options via signal-sensing or DC-offset sensing
JLid™ System Command and Control with Networking Capabilities
- Proprietary JL Audio protocol provides control interface and all communication for VXi amplifiers and optional JLid™ accessories, including:
- DRC-100 / DRC-205 (Digital Remote Controllers): Offers convenient DSP preset selection and level adjustments from the driver’s seat.
- VXi-BTC Bluetooth® Communicator: Adds wireless connectivity for amplifier configuration from a compatible iOS® or Android® device.
- VXi-HUB Optical Network Hub: Provides network connectivity for up to six VXi amplifiers, allowing full-system DRC control and preset selection. Up to two VXi-HUBs can be daisy-chained to control up to ten VXi amplifiers.
Specifications
| 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 - 21 kHz (+0, -1dB) |
| S/N Ratio, referred to highest rated power (Analog Inputs) | 99 dB (A-weighted, 20 Hz - 20kHz 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) | 101dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W (Digital Inputs) | 81 dB (A-weighted, 20 Hz - 20kHz 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 | |
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|
| 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 |