JL Audio VX400/4i
4-channel car amplifier with digital signal processing 400 watts
GENERAL FEATURES:
Amplifier plus DSP Combo
JL Audio's VXi Series amplifiers combine JL Audio's latest amplifier technology with premium signal processing. JL Audio teamed up with AKM™ to create this customized processor-amp hybrid. They also improved the amp's Class D performance by shortening the signal path, placing the output capacitor banks nearer the outputs, and DirectFET® MOSFET output devices, resulting in higher efficiency, and audio quality.
75 watts RMS x4
The VX400/4i 4-channel amp kicks out 75 watts RMS per channel and sports 6 channels of digital signal processing. It can power the front and rear speakers in your car, and still  knock out a processed signal for a separate subwoofer amplifier. You could also use this amplifier in bridged, 2-channel mode to power a couple speakers or subwoofers with 200 watts RMS each.
Digital precision
The 24-bit 96 kHz processing for each channel includes signal routing and mixing, 10-band parametric EQ, time-alignment, low-pass and high-pass filters, and 0.1 dB precision output level control. In addition to tuning the audio signal, the processor provides a master clock signal for the Class D amplification.
Features
4-channel car amplifier
Class D amplifier design with NexD2™ switching amp technology
75 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
200 watts RMS x 2 bridged at 4 ohms
24-bit 96 kHz digital processing
DSP adjustments and settings made via computer, tablet, or smartphone running JL Audio's TüN app 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 40-amp fuse recommended
9-1/16"W x 2-1/8"H x 6-11/16"D