JL Audio VX400/4i VXi Series 4 Channel Full Range Amplifier DSP Amp 400w RMS - CEN

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JL Audio VX400/4i VXi Series 4 Channel Full Range Amplifier DSP Amp 400w RMS

Name: JL Audio VX400/4i VXi Series 4 Channel Full Range Amplifier DSP Amp 400w RMS
Brand: JL Audio
SKU: 91039
Price: 1019.00 GBP
Availability: InStock

£1,019.00 Factory Order

Factory Order

SKU: 91039MPN: VX400/4I

Product variants

Part of the range · 27 productsPart of the JL Audio Amplifiers range · 27 products See the range →

The JL Audio VX400/4i is a 4-channel Class D full-range amplifier with an integrated DSP, rated at 75 W RMS x 4 into 4 Ω or 100 W RMS x 4 into 2 Ω at 14.4 V. It belongs to JL Audio's VXi series and is configured entirely via JL Audio's TüN software.

Part of the VXi range; several VXi amplifiers can be networked with the VXi-HUB (sold separately). For more channels, see the VX600/6i or VX800/8i.

Key specifications

Channels: 4, Class D full-range with integrated DSP
Power (14.4 V): 75 W RMS x 4 @ 4 Ω, 100 W RMS x 4 @ 2 Ω
Bridged (14.4 V): 200 W RMS x 2 @ 4 Ω
Power (12.5 V): 60 W RMS x 4 @ 4 Ω, 90 W RMS x 4 @ 2 Ω
Frequency response: 12 Hz – 24 kHz
Input voltage range (RCA): 200 mV – 16 V RMS
Fuse rating: 40 A
Dimensions (H x W x D): 54 x 229 x 168 mm; weight 2.27 kg

NexD2™ amplifier technology

Every VXi amplifier combines JL Audio's second-generation NexD2™ switching amplifier technology with a fully integrated digital signal processor. The NexD2™ design is DSP-controlled and uses a reduced loop area layout with DirectFET™ outputs for high fidelity, very low noise and strong efficiency.

Ultra-compact chassis

The VX400/4i chassis is ultra-compact, with all connections on one side, making installation into tight spaces straightforward.

TüN software configuration

There are no traditional control knobs or switches. All amplifier adjustments and DSP settings are configured via a compatible PC, tablet or smartphone running JL Audio's TüN™ software application.

In the box

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

Explore the full range in JL Audio VXi Amplifiers.

Specification

Frequency Response	12 Hz - 24 kHz (+0, -1dB)
More specs 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 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™) 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

Frequency Response

12 Hz - 24 kHz (+0, -1dB)

More specs

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
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™)
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

What's Included

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 information

JL Audio

About the JL Audio VX400/4I

From our tech experts at CEN

A 4-channel amplifier from JL Audio’s VXi Series, with digital signal processing built in, rated at 400w RMS.

Who it suits

Drivers whose speakers have outgrown the head unit, or who are building a front stage where each channel has a defined job. VXi Series has full DSP on board, so amplification and tuning arrive together and can be networked with other VXi amplifiers.

Our tech experts advise

The processing is worth only what the tuning puts into it: measurements in the car, delays set for the driving seat, crossovers chosen for your drivers. It also needs a fused feed from the battery on the correct cable gauge. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.

Explore the full JL Audio range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all JL Audio

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Car audio installation by CEN in Nottingham

Have it Fitted By Our Team

Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.

1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.

Get a Quote Our Services

Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA

Frequently Asked Questions

Q: How do I choose the right amplifier for my speakers or subwoofer?

A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.

Q: What wiring do I need to install this amplifier?

A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.

Q: What class of amplifier is this and does it matter?

A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.

Q: Will an amplifier work with my factory head unit?

A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.

Q: Can CEN install this amplifier?

A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.

Q: How do I adjust the settings on the VX400/4i?

A: The VX400/4i has no traditional control knobs or switches. All amplifier adjustments and DSP functions are configured with the JL Audio TüN software on a compatible PC, tablet or smartphone, and a 6 ft USB A/B cable is supplied.

Q: Can the VX400/4i be bridged?

A: Yes. It can be bridged into 4 ohms to produce up to 200 W RMS x 2 at 14.4 V.

Q: What's in the box with the VX400/4i?

A: The amplifier, power connector, 14 inch analogue input harness (15-pin D-Sub to 6 RCA), 18 inch ABCD speaker output harness, 6 ft USB A/B cable, 4 corner caps and corner cap tool, 2 silver thumbscrews, 2 black hex cap machine screws, 2.5 mm and 3 mm hex wrenches, JL Audio logo badge, connection guide and registration card.