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.
Digital accuracy
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 computer running JL Audio's TüN™ software for PCs and Macs. Requires a USB connection — 6' cable included with amp.
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.
Product highlights:
Featured in our article: Best subwoofer amplifiers for 2025
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
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
phase and polarity control
time alignment in 0.01 ms (1/8") increments
Connection Features
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 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:1 year