You have no items in your shopping cart.
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
- Technology >
- Fit Guide - Vehicle Compatibility Lookup
- Returns & Shipping
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
- 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 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.
|@ 4 Ω||75 W RMS x 4|
|@ 2 Ω||100 W RMS x 4|
|Bridged @ 4Ω||200 W RMS x 2|
|@ 4 Ω||60 W RMS x 4|
|@ 2 Ω||90 W RMS x 4|
|Bridged @ 4Ω||180 W RMS x 2|
|Frequency Response||12 Hz - 24 kHz (+0, -1dB)|
|S/N Ratio, referred to highest rated power
|99 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)|
|S/N Ratio, referred to 1 W
|80 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)|
|S/N Ratio, referred to highest rated power
|101 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)|
|S/N Ratio, referred to 1 W
|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|
NexD2™ Switching Technology
JL Audio's NexD2™ amplifier technologies are a next-level approach to improving what is already an outstanding Class D design platform. Employing new components and more advanced circuit layouts, fidelity and efficiency have been significantly enhanced.
NexD2™ switching technologies are an evolution of our renowned NexD™ Class D technology, with significant improvements in fidelity, efficiency and radiated noise performance.
NexD2™ employs a new generation of power supply and output devices, which are incredibly compact and surface-mountable. These Infineon® DirectFETTM devices feature the latest MOSFET silicon technology, the smaller package reduces parasitic capacitance and inductance thus improving current carrying capability and efficiency, encased in a metal enclosure to optimize heat dissipation. They also minimize radiated noise.
In addition to the new silicon, NexD2™ benefits from advancements in the area of circuit layout. Our "minimum loop area" design approach places capacitors closely coupled to each output section, and the amplifier circuits have been engineered to minimize the length of ground return paths. This approach reduces interaction between the audio channels, to improve separation and reduce distortion and radiated noise.
In the multi-channel VXi amplifiers, we have also leveraged the power of the on-board DSP to synchronize all channels via the DSP's master clock. This eliminates undesirable interactions between channels that are caused by variations in switching frequency.
The resulting NexD2™ amplifiers are incredibly compact and efficient, while delivering a level of fidelity that will satisfy the most demanding listener.
Advanced Rollback Protection
JL Audio's exclusive Advanced Rollback Protection circuit monitors the amplifier's thermal condition and adjusts amplifier operation to eliminate annoying amplifier shut-down events.
Should a JL Audio amplifier equipped with Advanced Rollback Protection reach an unsafe operating temperature, a special circuit rolls back peak power output, without changing gain, until the amplifier cools down to a safe operating temperature. The condition is generally indicated by a red “Thermal” or “Status” LED state. On VXI amplifiers, the LED ring will flash red. Once the amplifier cools down, the circuit restores full peak power output and the indicator reverts to its normal state. The operation of Advanced Rollback Protection is inaudible in most cases, but it ensures that your music keeps on playing, even under the most demanding conditions.
JL Audio’s Differential-Balanced Inputs are engineered to combat induced cable noise, which is a common problem in car and marine audio installations. This technology allows for the use of conventional RCA cables, while delivering many of the benefits of a true balanced connection and accepting a wide range of input signal levels.
Today’s vehicles are equipped with sophisticated electronics capable of generating noise and interference that can intrude into the audio path, ruining the listening experience.
Most audio equipment uses single-ended, ground-referenced RCA jacks to receive audio signals. This means that the RCA shield is connected directly to signal ground. This is a simple, cost effective input design that works well for short runs in noise free environments. In noisier environments, this method cannot reject the common mode noise that could be on both RCA conductors (shield and center conductor).
By having more than one chassis-grounded RCA shield on a device, single-ended input designs are also more susceptible to ground loops. If noise is present on both conductors while the shield is connected to ground, the input amplifier will amplify the noise relative to the grounded RCA shield. When there are multiple RCA connections or any other conductors subjected to a magnetic field, this will cause a difference in potential across the RCA loop to be amplified at the grounded RCA as noise (a classic ground loop).
JL Audio’s Differential-Balanced Input circuits measure the center pin of the RCA connection relative to the RCA shield, even when the shield is not connected to ground, and even when the voltages at both conductors are moving relative to ground. Because both the center conductor and the shield see high impedance to ground at the input, a ground loop cannot be formed, as there is no current flow to induce a voltage as noise. This works equally well with differential-balanced, or unbalanced signal sources, making this input architecture compatible with all standard car and marine audio equipment, using standard, unshielded, twisted-pair RCA cables. No special cables are required, unlike the fully balanced connections used in professional audio.
Another benefit of the Differential-Balanced Input design is that it easily accepts low-level and high-level signals from a variety of factory head unit outputs and amplifiers, including single ended “ground referenced” sources, as well as Balanced or Unbalanced “Bridged or BTL” sources. This eliminates the need for Line Output Converters (LOCs) in most installation scenarios.
The obvious question is: “Why don’t all car audio amplifiers use Differential-Balanced Inputs?” The answer is simple: it costs more. Executing a proper differential-balanced input section requires more components and better quality components than a basic single-ended design, so you generally won’t find them on less expensive amplifiers.
JLid™ is JL Audio's protocol for digital controllers and for communication of settings between devices (not for audio signals).
JLid™ offers two-way communication for a range of accessories, including the following:
Wired System Controllers: DRC-100, DRC-200, DRC-205
Bluetooth® Communicator: VXi-BTC
Networking Accessory: VXi-HUB
JL Audio FiX™ and TwK™ processors each feature one “JLid™ Port”, designed for connection of a wired controller.
JL Audio VXi amplifiers offer powerful networking capabilities via JLid™, to deliver single-point control of multiple amplifiers in a system. This allows the user to adjust levels (Volume, Fader, Balance, Zone Level) and to select from multiple DSP presets, across an entire group of networked amplifiers. JL Audio VXi amplifiers each feature separate “JLid™ Control” and “JLid™ Comm” ports. Please refer to the VXi product manual and our Help Center for details.
JLid™ connections are made via standard CAT-5e cables.
- U.S. 48 Only
FREE: 1-5 Business Days UPS
Expedited Shipping Options: Calculated At Checkout
Large Item Shipping Costs: Calculated At Checkout
We ship most orders the same day if placed before 3pm Eastern time Monday - Thursday. Orders placed after 3pm will ship the next day. Orders placed after 3pm on Friday will be shipped on Saturday, orders placed after 3PM on Saturday will be shipped on Monday. We are glad to announce Saturday shipping – however we do not ship on Sundays. We do not ship on US holidays or whenever our carriers take holidays i.e., USPS, UPS, and FedEx.
Returns - Online Purchases
Purchases made on freemanscarstereo.com are eligible for a return request within 30 days of order delivery. A return authorization number is required for all returns: any return that does not contain a return authorization number will be refused and returned to the sender. Full refunds are only issued for unopened and unused products.
> Full Refunds
In order to be eligible for a refund, item(s) must be unused, unopened, and in the same condition in which it was received. There is no restocking fee for brand new/unopened/sealed items.
Customers will receive a return confirmation email within 1-2 business days that will confirm receipt of their return and confirm whether or not that return will be eligible for a refund. Approved refunds will be processed automatically via a credit back to the customer’s original payment method.
> Partial Refunds
Any item that is damaged, has missing parts, or is not in its original condition is subject to a restocking fee of up to 50% of the order total. If the box or seal is opened there is a 20% restocking fee.
Installed, used, or damaged items may not be eligible for return or, will incur a restocking fee. These situations include but are not limited to the following:
- Any sign of use - including signs of installation, scratches, physical marking, screw holes, or similar.
- Tags, stickers, or other manufacturer labels removed or tampered with.
- Missing parts or the original product packaging is damaged.
- A product that is returned bearing a serial number that does not match the serial number of the product shipped by Freeman’s Car Stereo.
- Physical damage from drops, liquid, mishandling or similar.
- Damage due to improper return packing by customer.
- Mounted or used subwoofer enclosures and speaker boxes.
- Blown, punctured or fried speakers, subwoofers, and amplifiers.
> Late or Missing Refunds
Refunds can take a week or longer to post to your account depending on your bank. If you haven’t received a refund yet, please contact your credit card company or bank. If your refund has still not been posted within 2 weeks of being issued please contact us via email: email@example.com.
> Online Gift Returns
If the item was marked as a gift when purchased and shipped directly to the gift recipient, the gift recipient will receive a store credit for the value of the return. Once the returned item is received, a freemanscarstereo.com gift certificate will be mailed.
We follow all manufacturer’s policies regarding the processing of warranties. Warranty exchanges or repairs are subject to eligibility periods based on purchase date as well as specific manufacturer policy.
Missing serial numbers, physical damage, or customer abused products will void warranties, repairs, and exchanges.
Items That Cannot Be Returned
- - Gift cards
- - Opened and/or used installation parts will not be accepted for return or refund.