JL Audio (XD400/4v2) - 4 Ch. Class D Full-Range
Amplifier, 400 Watt
Description:
4-Channel Class D Full-Range Amplifier, 100 W x 4 @ 2 Ohm
/ 75 W x 4 @ 4 Ohm - 14.4V
This tiny amplifier packs a serious full-range punch,
delivering a staggering 100 watts to each of its four
channels into 2 ohms (14.4V, 1% THD). The breakthrough
that makes this much power possible in such a small
chassis is JL Audio's NexD ultra-high-speed switching
design, which allows for full bandwidth Class D operation
with extremely low distortion and outstanding efficiency.
Use the XD400/4v2 in combination with JL Audio'
XD600/1 monoblock to build a 1000 W amplification system
to power four satellites and a subwoofer... and fit the
whole thing under a seat. Or, use the XD400/4v2 by itself
to power two satellites, plus a subwoofer. With XD's,
the possibilities are endless.
The XD400/4v2 includes a 12 dB / octave filter for each
channel bank, which can be configured as a low-pass or
high-pass filter and offers continuously variable cutoff
frequency selection from 50-500 Hz.
The XD400/4v2 also features the v2 Spec feature set,
which consists of automatic turn-on capability (via
signal sensing or DC-offset sensing), and a dual-range
differential-balanced input section able to handle a wide
range of input voltage levels. With the addition of an
HD-RLC remote level control (sold separately), the
amplifier's level can be directly controlled from the
driver's seat.
This amplifier features a black powder-coat finish and a
gasketed, brushed aluminum cover for the controls.
Technology:
Amplifiers
JL Audio has tackled the challenges of automotive
amplifier design with the same commitment to engineering
and innovative thinking that they apply to their speaker
designs. For them, it isn't enough to repackage
circuits and technologies that have been around for
decades... their customers expect more.
The affordable JX lineup offers rock-solid performance
with well-proven Class D and Linear amplifier
technologies, while the cutting-edge HD and XD amplifiers
finally deliver on the promise of full-range switching
amplifiers, combining outstanding efficiency, small size
and amazing sonic qualities. The legendary Slash-Series
that started it all is also available and features JL
Audio's unique R.I.P.S. power supply and patented
output technologies.
Whichever JL Audio amplifier you choose, you are
getting a serious product designed to make great audio in
your vehicle.
NexD Switching Technology - NexD amplifier
technologies produce exceptional audio quality,
unsurpassed total efficiency and high power from very
compact amplifier designs.
Beginning with the original 'Slash' subwoofer
amplifiers, JL Audio has been at the forefront of Class D
amplifier design. Today, their flagship Single-Cycle
Control technology sets the ultimate standard for Class D
amplifier performance. The NexD amplifiers may be a bit
less complex, more compact and more affordable, but they
flow from the same minds that have set the trend in
mobile amplifier technology for over a decade.
Let's get a little nerdy... A traditional PWM
switching amp design uses a fixed switching frequency and
varies the pulse width based solely on the audio input
signal to the pulse modulator. This basic approach
assumes some ideal conditions, like a rock-steady power
supply, that do not necessarily occur in a real, in-car
installation. Power supply sag with signal causes
distortion at all power levels with these designs, even
well below clipping. The cure for this is feedback (a
corrective signal sent back to the input side), but this
becomes impractical as the audio frequency increases,
making it a good solution for band-limited (subwoofer)
amps, but not for full-range amplifiers.
Taking the above into account when designing the NexD
subwoofer amplifiers,JL Audio has taken the simple fixed
PWM approach and enhanced it with a very high switching
frequency: 240 kHz, which is about 4x higher than most
Class D subwoofer amplifiers. This pushes the
amplifier's bandwidth to at least 500 Hz with minimal
distortion and improves efficiency, while keeping
typically bulky circuity more compact. Your subwoofers
will reward you with tight, rock-solid bass performance.
For the full-range NexD amplifiers and channels we
applied a variable, ultra-high speed version of the NexD
technology (switching at well over 400 kHz). In these
designs, a self-oscillating modulator with
"feed-forward" sends information about the
instantaneous power supply voltage to the modulator,
combining this with the input signal to cancel out any
distortion due to supply voltage fluctuation. This
reduces distortion prior to applying feedback,
simplifying the overall feedback loop design.
The bottom line is simply great audio: clean, powerful
and reliable.
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 red
"Thermal" LED will light to indicate this
condition has been reached. Once the amplifier cools
down, the circuit restores full peak power output and the
red "Thermal" 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.
v2 Spec - An enhanced set of features added to XD
and M-Series amplifiers that bear the "v2"
designation make these models more versatile than ever.
Automatic Turn-On - Automatic turn-on detects a
signal from virtually any audio source to turn on the
amplifier. This feature gives the user greater
flexibility in installations where the amplifier may be
connected directly to a digital media players such as an
iPhone or iPod. The amplifier will also turn on via the
traditional remote turn-on lead from a switched +12 V
power source from your head unit. Audio signal sensing
from the amplifier's inputs or electrical signal
sensing from the amplifier's remote lead... Automatic
turn-on means you only have to concern yourself with
hitting "play".
Dual-Range Differential Balanced Input Section -
The realities of today's installations mean the input
section of the amplifier could be connected to a variety
of audio sources, which is precisely why the input
section of the v2 Spec amplifiers has been intelligently
designed to give the user maximum flexibility. Whether
your installation needs require connecting higher powered
Speaker-Level Inputs or lower powered Line-Level Inputs,
the amplifier will permit either and ensure the high
fidelity amplifier output you've come to expect from
JL Audio without the need for messy line-output
converters and other devices.
JL Audio - Ahead of the curve.
Features and Specifications:
- 4-Channel Class D Full-Range Amplifier, 100 W x 4 @ 2
Ohm / 75 W x 4 @ 4 Ohm - 14.4V
- Rated Continuous (RMS) Power @ 14.4 V:
- @4 Ohm - 75 W RMS x 4
- @2 Ohm - 100 W RMS x 4
- Bridged @ 4 Ohm - 200 W RMS x 2
- Rated Continuous (RMS) Power @ 12.5 V:
- @4 Ohm - 60 W RMS x 4
- @2 Ohm - 90 W RMS x 4
- Bridged @ 4 Ohm - 180 W RMS x 2
- General Specifications:
- Frequency Response - 12 Hz - 22 kHz (+0, -1dB)
- S/N Ratio, Referred to Highest Rated Power -
>104 dB below rated power (A-weighted, 20 Hz - 20
kHz noise bandwidth)
- S/N Ratio, Referred to 1 W - >84 dB
(A-weighted, 20 Hz - 20 kHz noise bandwidth)
- Damping Factor @ 4 Ohm - >150 / 50 Hz
- Damping Factor @ 2 Ohm - >75 / 50 Hz
- THD+N @ Rated Power - <1% @ 2 Ohm per Ch.
- Input Voltage Range @ RCA Inputs - Switchable
from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS
(High)
- Min Copper Power / Ground Wire Gauge - 4 AWG Wire
- Fuse Rating - 50 A (AFS, AGU or MaxiFuse)
- Signal Processing:
- Filter Modes - Low-Pass or High-Pass
- Filter Slope (dB/Octave) - 12dB
- Filter Frequency Range- 50-500 Hz
- Detented, Calibrated Filter Freq. Potentiometer -
Yes
- Filter Defeatable? - Yes
- Remote Level Control - Optional (HD-RLC)
- Remote Level Modes - 2 or All Channels
- Channel Input Mode Switch - Yes (2/4 Ch.)
- Pass-Through Preamp Output Type - Buffered
- Source Channel Selection for PreOuts - Yes
- UPC 0699440986021
- Color: Black
- Manufacturer's Limited Warranty - 2 Year(s)
- Sold: Each
JL Audio (XD400/4v2) - 4 Ch. Class D Full-Range
Amplifier
Please Note:
- This Selection Is JL Audio (XD400/4v2) ONLY.
- Manufacturer's product specifications,
packaging and limited warranties (if applicable) are
subject to change.
- Images are solely for illustrative purposes and may
reflect multiple items or multiple views of a single
item.
- This Item Is Sold: Each