About the JL Audio VX600/1i
Amplifier plus DSP
Amplifier plus DSP
We've heard a lot of good things about JL Audio's VXi Series amplifiers, which combine JL Audio's latest amplifier technology with powerful signal processing. They also improved the amp's Class D performance by shortening the signal path through the amp, placing the output capacitor banks nearer the outputs, and using up-to-date DirectFET® MOSFET output devices, resulting in higher efficiency, reliability, and audio quality.
600 watts of bass
The VX600/1i mono subwoofer amplifier can put out up to 600 watts RMS for your sub, and features 3 channels of digital signal processing. You could set up a system, for example, by routing the signal from the receiver to this sub amp first, and then sending a processed stereo signal on to a separate amplifier for your other speakers.
The 24-bit 96 kHz processing for each channel includes signal routing and mixing, 10-band parametric EQ, time-alignment, high- and low-pass filters, and output level control with 0.1 dB precision. In addition to tuning the audio signal, the processor provides a master clock signal for the Class D amplification, increasing audio accuracy.
Remote control only
You make all your settings and adjustments from your compatible device running JL Audio's TüN™ software.
- PC and Mac OS: TüN 3.0 — requires a USB connection (6' cable included with amp)
- Android and iOS tablets: TüN Mobile — requires Bluetooth connection and the VXi-BTC Bluetooth communicator (sold separately)
- Android phones and Apple iPhones: TüN Express (for Basic setups only) — requires Bluetooth connection and the VXi-BTC Bluetooth communicator (sold separately)
Other accessories you may want with this amp
This VXi amplifier features JLid™ inter-device connection ports for JL Audio's proprietary network system for controlling data. The DRC-205 digital remote control lets you adjust the master volume, subwoofer level, switch between up to six preset tunings, and indicates the amp's status via LED. An optional VXi-HUB network hub comes in handy when you have three or more VXi amps in your system, coordinating all the adjustments and controls. A FiX 82 or a FiX 86 can be used to remove factory sound processing, for higher-fidelity factory system integration for your VXi amplifier.
VX600/1i connection panel
- Featured in our article: Best subwoofer amplifiers for 2023
- mono subwoofer amplifier
- 400 watts RMS x 1 at 4 ohms (600 watts RMS at 2 ohms)
- Class D amplifier design with NexD2™ switching amp technology
Digital Signal Processing:
- 24-bit 96 kHz digital processing
- DSP adjustments and settings made with JL Audio's TüN app (PC and Mac) via USB, via Bluetooth (tablets and phones) with BTC Bluetooth option
- 3 Project Levels of tuning: Basic, Advanced, Expert
- input routing and mixing
- adjustable gain controls with clip indication
- fully adjustable high-pass, low-pass, and bandpass filters
- selectable filter slopes (6, 12, 18, 24, 30, 36, 42, 48 dB/octave)
- 10-band EQ (graphic in Basic, parametric in Advanced and Expert modes)
- phase and polarity control
- time alignment in 0.01 ms (1/8") increments
- differential-balanced inputs eliminate noise coming from your vehicle's electrical system
- preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input)
- high-level inputs — up to 16 volts RMS (about 60 watts)
- DC offset or signal sensing auto turn-on eliminates need for remote lead
- 2-channel digital input and output (S/PDIF: up to 24-bit 192 kHz in, 24-bit 96 kHz out)
- 2-channel analog preamp output (4V RMS)
- JLid™ connections for optional Network Hub, Bluetooth Communicator, and Digital Remote Control
- USB connection for device running TüN app (6-foot cable included)
- wiring, fuse, and hardware not included with amplifier
- 4-gauge power and ground leads and a 50-amp fuse recommended
- 9-1/16"W x 2-1/8"H x 6-3/4"D
- warranty: 2 years
- Our 60-day money-back guarantee
- MFR # 98638
What's in the box:
JL Audio VX600/1i owner's manual
- Monoblock amplifier
- Power connector
- 14" Analog Input harness (15-pin D-Sub/4 RCA)
- Subwoofer output connector
- 18" Speaker wire loom
- "Sub" wire label
- 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
JL Audio VX600/1i reviews
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More details on the JL Audio VX600/1i
Features & specs
|RMS Power Output (Watts x Channels)||
400 x 1 |
|Peak Power Output (Watts x Channels)||N/A|
|Power at 2 Ohms (Watts x Channels)||600 x 1|
|Bridged Power (Watts x Channels)||N/A|
|Minimum Impedance Bridged||N/A|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||12-500 Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||64 dB|
|Low-Pass Crossover Frequency||Via Tun software|
|Low-Pass Slope (dB/octave)||Via Tun software|
|High-Pass Crossover Frequency||N/A|
|High-Pass Slope (dB/octave)||N/A|
|Bass Boost Frequency||N/A|
|Speaker Level Inputs||Yes|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Digital Signal Processing
VXi Amplifiers: The JL Audio VXi-series of amplifiers feature advanced technology with built-in digital signal processors. These compact amplifiers pack a lot of power into a small package. Each VXi amplifier is equipped with a customized, triple-core DSP that allows you to tune the amplifier to the exact performance you need. With JL Audio's free TüN software on your computer, tablet, or smartphone, you can configure the amplifier from the driver's seat. Up to six active preset tunings can be stored.
Monoblock Amplifier: The VX600/1i monoblock Class D amplifier that has been optimized for low-frequency amplification of connected subwoofers. It has advanced NexD2 switching amplifier technology to deliver solid bass with high fidelity and efficiency. The amp does not have traditional control knobs and switches for setting up the amplifier. Instead, the input sensitivity, crossover, and polarity settings are configured via the TüN software.
Note: The VX600/1i is not designed for driving full-range speakers, midrange drivers, or tweeters.
Logo Badge: The included JL Audio logo badge is included in the box, unattached. The badge has an adhesive backing for attaching it according to your installation in any 90° increment. The color of the LED ring around the logo badge can be configured in the TüN software to display the amp's status, audio preset, or a user-defined color.
Digital Signal Processing
DSP: JL Audio's Digital Signal Processing engine, when partnered with the TüN software, gives you an enormous amount of control over the configuration and settings of the amplifier. It is equipped with high-performance A/D and D/A converters, and audio processing for high-resolution 24-bit/96kHz audio files. For some VXi models, the DSP offers a 10-band parametric EQ for each output channel, including pre-outs, Linkwitz-Riley and Butterworth high-pass and low-pass filters, Signal Delay (0.01 millisecond steps), polarity reversal, and output trim levels (in 0.1dB steps).
TüN Software: The free TüN software lets you configure, tune, and control your VXi amplifier from your PC, tablet, or smartphone. The TüN software is available for Windows PC (Windows 7 SP1, 8.1, and 10 / 32-bit or 64-bit) and Apple computers. TüN Mobile is available for iPad and Android tablets, while TüN Express works with iPhone and Android smartphones. The apps are compatible with iOS version 10.0 or later, and Android 4.4 and up. When connected to the VX600/1i, you can make the following adjustments and settings on the application:
- Input Selection: Analog or Digital
- Turn-on Mode: Remote, DC offset, Signal Sense
- Polarity: + or -
- Infrasonic Filter: 30Hz or Off
- Low-pass Filter: Off, 12dB, or 24dB; Cutoff frequency: 20Hz (or Infrasonic frequency) to 500Hz
- Level Setting:
- Input Level: Min to 11
- Output Trim: -18.0dB to +12.0dB
- Mute All: On/Off
Power Output: The VX600/1i power specifications are as follows:
| Rated Continuous
Power @ 14.4V |
| Rated Continuous
Power @ 12.5V |
Power/Ground/Turn-On Terminals: The VX600/1i features a removable plug with C-Clamp terminals for the power, ground, and remote turn-on cables. This allows you to pre-connect the wires to the connector, then plug it into the amplifier. JL Audio recommends 4-gauge power and ground wire, and 10-18-gauge wire for the remote turn-on. The supplied 3mm and 2.5mm hex wrenches are for tightening/loosening the C-Clamps.
Note: The amplifier is not equipped with a fuse. An external 50-amp AFS, AGU, or MAXI fuse (not included) must be installed on the power wire. If a wiring kit is used which includes a fuse with a value other than 50-amps, the original should be replaced with a 50-amp fuse.
Speaker Output Terminals: The JL Audio VX600/1i features a removable Subwoofer Output connector with set-screw terminals. The connector's two set-screw terminals will accept 14-gauge to 10-gauge speaker wire. A 2.5mm hex-wrench is supplied for tightening/loosening the set-screws. The included 18" length of flexible loom is to cover the subwoofer speaker wire at its connection with the amp. The loom matches the look of the Analog Input Harness, and makes for a clean, uniform look.
Analog Input Harness: The amplifier has a 15-pin D-Sub connection for the supplied 14" Analog Input harness. Three loom-covered cables exit the cable's D-Sub connector, with stereo female RCA inputs, stereo female RCA preamp outputs, the remote turn-on output (+12V) and Valet Preset Toggle lead.
Digital Inputs/Outputs: The amp has optical digital (Toslink) inputs for direct connection of S/PDIF digital sources, bypassing the A/D converter. The input accepts up to 24-bit/192kHz signals. There is also a Toslink optical digital output for sending a digital signal (24-bit/96kHz) to another VXi amplifier.
USB: A Type B USB port is provided for connecting the amp to your computer for interfacing with the TüN software. A 6' Type A to USB-B cable is provided.
RJ-45: Two RJ-45 modular ports are provided on the amplifier for optional accessories:
- JLid-COMM: One RJ-45 port, labeled JLid-COMM, is for the optional VXi-BTC Bluetooth Communicator (for wireless communication with Apple or Android smartphones and tablets), or the optional VXi-HUB Optical Network Hub (for connecting up to five slave VXi amplifiers -- ten with two VXi-HUBs, allowing synchronization of controllers and DSP presets).
- JLid-CTRL: The other RJ-45 port, labeled JLid-CTRL, is for the optional Digital Remote Controller (DRC) connection. The optional DRC-205 digital remote control allows you to conveniently set amplifier levels and DSP presets from the front of the vehicle.
microSD: A microSD port is provided on the front of the amplifier for future expansion.
- Frequency Response: 12 Hz - 500 Hz (+0, -1dB)
- Input Voltage Range (at RCA inputs): 200mV - 16V RMS
- Signal-to-Noise Ratio (analog and digital inputs, 20Hz - 20kHz noise bandwidth): 90dB (rated power); 64dB (1 W)
- Damping Factor: >125dB / 50 Hz @ 4Ω and 2Ω
- Standby Current Draw: 3.6 mA
- Dimensions (WxHxD): 9.02" x 2.093" x 6.7"
- Weight: 5 pounds
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