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Description
JL Audio VX400/4i : 4ch x 75W/100W Digital DSP Amplifier @ 4Ω/2Ω4 Channel Class D Full Range Amplifier with Integrated DSP, 100 Watt x 4 @2 Ohm 75 Watt x 4 @ 4 Ohm. Designed to simplify great audio, every VXi amplifier combines JL's advanced NexD2 switching amplifier technology with an integrated, full featured digital signal processor. With JL's 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
4-Channel Class-D Full-Range Amplifier with Integrated DSP, 100-Watt x 4 @2-Ohm / 75-Watt x 4 @ 4-Ohm.
Designed to simplify great audio, every VXi amplifier combines JL's advanced NexD2™ switching amplifier technology with an integrated, full-featured digital signal processor.
With JL's 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
- High-Pass & Low-Pass Filters for each output 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 (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
- JL's 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 Digital Remote Controllers: Offers convenient level and DSP preset control from the driver's seat.
- VXi-BTC Bluetooth® Communicator: Permits wireless configuration of VXi amplifiers using your compatible Apple® or Android® device.
- VXi-HUB Optical Network Hub: 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.
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™)
Output Specifications
-
@ 4 Ω
75 W RMS x 4
@ 2 Ω
100 W RMS x 4
Bridged @ 4Ω
200 W RMS x 2
Documentation
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Solid
Color: Black Oval
Solid exactly what it looks like great for price and a modern setting
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Reviewed in the United States on April 25, 2026
★★★★★ 4
Smaller than expected
Color: Black Oval
The tray looks nice and the hook design is convenient, but the hook itself doesn't feel very sturdy. I also expected the tray to be larger. It still works for holding keys and small items, but I wish it were a bit stronger and bigger.
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Reviewed in the United States on October 11, 2025
★★★★★ 5
You get what you pay for
Color: Black Oval, Color: Black Oval
Honestly pretty happy with the purchase . Good enough size to fit the essentials, doesn’t look too cheap, and sturdy enough.
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Cute Key Holder
Color: Black Round
Needed a key holder, stumbled across this and it’s really perfect for an entryway table. You can toss other stuff at the bottom you may need when you leave the house which I love. It goes well with our decor as well. It’s a cool idea for a key holder. It’s sturdy as well.
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Reviewed in the United States on November 21, 2024
★★★★★ 5
If you have food odors get the Smoke filter
Color: White, Color: White
This completely stopped the downstairs tenants cooking odors from smelling up my upstairs studio apartment. No smells at all!
I live in a two story home where the downstairs is rented and my upstairs studio is my rental and we share a kitchen that's adjacent to the stairway that takes me upstairs to my home.
For 6 years I have had to smell their food cooking. It's over powering and my curtains and bedding and living space smells like broccoli, garlic and burned out toasted cooking odors... opening my windows just draws more of the smell up to my space.
My studio is 20x30 and the stairway. I was desperate and this was advertised as a lightning deal. I bought the smoke/smell filter option.
It's was real easy to set up; ask I had to do it that the sealed bag off the filter and plug it in. There was already the smell of their dinner in my space when I set it up and I was expecting it to help eliminate or reduce the smell that was lingering but it didn't.
I'm the morning my space was fresh: so fresh it almost felt cool and breezy.
I've been running non stop since I plugged it in the first night and ALL SMELL IS GONE and STAYS GONE!
They had friends over. So I go through the kitchen to go outside as to not bother them in their living room. The kitchen smelled wonderful with all kinds of food including chicken wings they had delivered... their space of like a fast food restaurant.
I came back a half hour later, walked through their kitchen that's was still overwhelming incredible party food smells and went up to my space through the upstairs stairway just off our shared kitchen.
My space HAD NO SMELLS AT ALL! It was completely fresh. It the very top of my stairway you could smell the kitchen but I'm my studio space I couldn't smell anything.
I think ... When I first plugged it in that first evening the dust in my studio had smells trapped to them. Overnight that first night, the dust was removed so all the residual smell was cleaned out too. There's no dust anywhere in my space and it was crazy dusty especially the hallway to the stairwell.
No dust. No smells. And it's VERY quiet. when it on high speed and TV is on you can't hear it at all and it doesn't interfere with the TV sound: I don't have to turn TV up because it's that quiet. I have a white noise machine to block out the traffic noise and thev sound of this air cleaner is quieter than that even when it's on high speed: it's a very soothing sound
I bought two replacement filters. Each one is suppose to last about 2 months.
The fan has 3 speeds and the low is really nothing and it sounds like it's off but it does still move a lot of air. I leave it in the medium. I read online that high speed can actually work against the filtering is it's in a small space because of the air movement blows the room air around too much. I just keep it on medium until bed and then I put it on low.
It does have a sleep setting and timer and a child lock but I'm not using those functions at all.
The blue glow light is not a problem at all I'm fact the glow is so low I use it for the hall night light and I removed the night light I had plugged into the hallway outlet. I'm extremely pleased I'm actually over joyed with it
My curtains, bedding, furniture, clothes and bathroom towels are FRESH and SMELL FREE.
I highly recommend this air cleaner fg it's amazingly effective. It's so small and light that you could move it anywhere but I've found the sweet spot just at the top of the stairway in the hall to my studio... life is all mine again without anyone's life stinking up mine.
They are actually ordering one now two because the fellow downstairs needed to get to the attic. He came up and actually said wow it's so fresh up here; did you have the windows open all day. I said no it's too cold you do that but I did get this air cleaner. They'll get it tomorrow!
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Reviewed in the United States on May 15, 2026