Monoblock Class D Wide-Range Amplifier, 300 W x 1 @ 2 Ω / 160 W
x 1 @ 4 Ω - 14.4V Engineered specifically for powersports
applications, the MX300/1 monoblock amplifier employs our
high-speed NexD⢠sw design to pack a serious audio
punch, without straining charging systems. Its tiny, cast
aluminum chassis is highly resistant to corrosion, with an IPX7
water-resistance rating, making it perfect for motorcycles,
ATVâs or other utility vehicles. With a robust 300W of clean
power into a 2-ohm load (14.4V, 1% THD), use one to drive a
subwoofer, or grab a pair to deliver stunning output to a
subwoofer system. The MX300/1 also features an adjustable
low-pass crossover, a bass boost EQ, variable infrasonic filter
and output polarity switch. Its dual-range input section accepts
a wide range of input voltage levels, from line-level all the way
to high-power speaker level signals. With the addition of an
M-RBC-1 remote level control (sold separately), subwoofer output
can be directly controlled from the driverâs seat. This
amplifier features a rugged powder-coated finish, a keted
cover for the controls and stainless steel hardware for
durability. @ 4 Ω 160 W RMS x 1 @ 3 Ω 220 W RMS x 1 @ 2 Ω 300
W RMS x 1 @ 1.5 Ω N/A @ 4 Ω 160 W RMS x 1 @ 3 Ω 200 W RMS x 1
@ 2 Ω 250 W RMS x 1 @ 1.5 Ω N/A Frequency Response 20 Hz - 12
kHz (+0, -1dB) S/N Ratio, referred to highest rated power >85 dB
below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
S/N Ratio, referred to 1 W >64 dB (A-weighted, 20 Hz - 20 kHz
noise bandwidth) Damping Factor @ 4 Ω >150 / 50 Hz Damping
Factor @ 2 Ω >75 / 50 Hz THD+N @ Rated Power <1% @ 2 Ω Input
Voltage Range @ RCA Inputs Switchable from 250 mV - 4 V RMS (Low)
to 750 mV - 15 V RMS (High) Min.Copper Power / Ground Wire Gauge
8 AWG wire Fuse Rating 30 A (AFS, AGU or MaxiFuseâ¢) Filter
Mode(s) Low-Pass only Filter Slope(s) 24 dB/octave Filter
Frequency Range 40 Hz - 400 Hz Detented, Calibrated Filter Freq.
Potentiometer Yes Filter Defeat Function Yes Infrasonic Filter 20
Hz - 40 Hz, variable Bass Boost EQ 0 to +12 dB @ 43 Hz Output
Polarity Switch Yes Remote Subwoofer Level Control Optional
(M-RBC-1) Remote Bass EQ Boost Control No Pass-Through Preamp
Output None Height (H) 1.77 in / 45 mm Width (W) 8.66 in / 220 mm
Depth (D) 3.09 in / 78.5 mm Net Weight 3.18 lb / 1.44 kg NexDâ¢
Sw Technology Summary: NexD⢠amplifier technologies
produce exceptional audio quality, unsurpassed total efficiency
and high power from very compact amplifier designs. Detailed
Information: Beginning with the original 'Slash' subwoofer
amplifiers, JL Audio has been at the forefront of Class D
amplifier design. Our NexD⢠sw technology stems from our
Class D expertise to deliver outstanding fidelity and efficiency,
leading to compact amplifiers that deliver high power and
exceptional value. Let's get a little nerdy... A traditional PWM
sw amp design uses a fixed sw 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, we have taken the
simple fixed PWM approach and enhanced it with a very high
sw 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 NexDâ¢
technology (sw 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. Â Â Differential-Balanced Inputs Summary: JL
Audioâs 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. Detailed Information: Todayâs 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 Audioâs 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 âground referencedâ
sources, as well as Balanced or Unbalanced âBridged or BTLâ
sources. This eliminates the need for Line Output Converters
(LOCs) in most installation scenarios. The obvious question is:
âWhy donât all car audio amplifiers use Differential-Balanced
Inputs?â 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 wonât find them on less
expensive amplifiers. Download  MX300/1 Product Manual  USA
Limited Warranty: Â Two (2) years from the original date of
purchase Warranty Details  Find the answers to many common
questions: Â