Four-Channel Full-Range Amplifier: The JL Audio 300/4v2 is a class A/B
four-channel, full-range amplifier that is rated at 75 Watts RMS x 4-channel in
1.5 to 4-ohm at 20 to 20kHz with a signal-to-noise-ratio of 108.5 dB and a total
harmonic distortion of 0.03% while receiving 11 to 14.5 Volts. The amplifier can
also be bridged to output 150 Watts RMS x 2-channel in 3 to 8-ohms.
R.I.P.S. (Regulated, Intelligent Power Supply): R.I.P.S. stands for
"Regulated, Intelligent Power Supply" and is a central feature of the JL Audio's
Slash v2 amplifier. The JL Audio R.I.P.S. System ensures consistent power
delivery over a wide range of battery voltages and load impedances. This
technology provides optimum power at any impedance level between 1.5 ohm to 4
ohm per channel and at any vehicle voltage level between 11V and 14.5V:
- Regulated Power Supply: "Regulated" means that the power supply
adjusts its operation so as to maintain the amplifier's rated power output
and low distortion operation over a wide range of vehicle voltages (11V-14.5
V). This allows the JL Audio Slash v2 amplifier's the rail voltage and clean
power output to remain stable in real-world car-audio systems, resulting in
superior fidelity and stability.
- Intelligent Power Supply: The "Intelligent" portion of the
R.I.P.S. System is a circuit that actually monitors output current to
optimize the amplifier's output power over a wide range of load impedances
(1.5 ohm to 4 ohm per channel). The R.I.P.S. System detects the actual
impedance being driven and adjusts output rail voltages to deliver optimum
output. The entire process is seamless, automatic, and results in incredible
dynamics for satellite channels and consistent power output for a wide range
of subwoofer configurations. It also takes into account the real impedance
of your car-audio system, rather than relying on often inaccurate
assumptions based on a speaker's rated impedance.
Monolithic RealSink Plus Advanced Heat Management: This Slash v2
amplifier features a real cast-aluminum heat sink with vertically-oriented fins
that are highly effective at dissipating heat from the amplifier via convection
and radiation. The design of this heat sink is achieved through extensive
finite-element analysis, resulting in an amplifier that keeps cool under the
most demanding conditions. If a Slash v2 amplifier should ever reach an unsafe
temperature, our unique Advanced Rollback Protection circuit also adjusts power
until the amplifier cools down, without ever shutting your music down. As an
added cosmetic benefit, the cast-aluminum end-caps of the Slash v2 amplifier
replicate one-half of a full heat sink fin so that when two or more amplifiers
are mounted end-to-end, you get a totally seamless custom look.
Absolute Symmetry A/B Circuitry: The JL Audio full-range amplifier
benefits from a patented technology called Absolute Symmetry to deliver amazing
fidelity with extremely low distortion over a wide range of load impedances. The
JL Audio amplifier features a revolutionary Class A/B circuit that employs
identical N-Channel MOSFET transistors for push and pull with true buffering
from the load impedance. This is accomplished via a patented circuit that
reverses the operation of one of the transistors in each pair to achieve
absolute power symmetry and extremely low distortion over a wide range of load
Differential-Balance Inputs: The JL Audio amplifier features
differential-balanced input architecture to effectively control noise and ensure
compatibility with a wide variety of source units, including many OEM
systems. Without resorting to line output converters, you can directly connect
most OEM source units to the JL Audio amplifier without creating any noise or
compatibility issues. Unlike conventional single-ended inputs, the
differential-balanced design does not connect one side of the audio signal to
chassis ground. This eliminates any voltage sensitivity between one input
terminal and ground and greatly reduces the incidence of alternator whine in a
typical car audio installation. The Slash v2 amplifier provides range switching
on each of its inputs via the "Input Voltage" switch. This permits connection to
a wide range of source voltages while retaining excellent sensitivity setting
Note: You will need two speaker wire to RCA adaptors (136XDCLR2S,
sold separately) to connect this amplifier to your headunit via
Protection Circuitry With Status Indicator Lights: There are
three status indicator lights on the top of the amplifier:
- Power (Green): This LED lights green to indicate that the
amplifier is turned on and operating normally.
- Thermal (Red): This Red LED lights to indicate that the amplifier
has exceeded its safe operating temperature, putting the amplifier into a
shelf-protection mode, which reduces the power output of the amplifier. The
red light will shut off and the amplifier will return to normal, full-power
operating mode if the heat sink temperature drops back to a safe level.
- Low Ohm (Amber): This amber LED lights to indicate that the
impedance of the speaker load connected to the amplifier is lower than the
optimum impedance load range for the amplifier. When this light is on, a
protection circuit engages and reduces the power output of the amplifier.
The amber indicator will also light when a short-circuit is detected in the
Note: There is only one condition that will shut down the
300/4v2 completely and that is if the battery voltage of your vehicle
drops below 10 volts.
Simplified Gain Setting: The amplifier's R.I.P.S. feature also allows
for easy gain setup. Because the amplifier will always deliver the same amount
of power within its operational range of impedances and supply voltages, the
maximum, unclipped output is very predictable. This makes setting the gain level
of the amplifier via the input sensitivity control very simple. All you need is
Digital AC Voltmeter (142TK12V, sold separately) and a Test CD Disc (503CD104,
sold separately) with a sine-wave test-tone recorded at 0 dB reference level in
the frequency range to be amplified for that set of channels (50 Hz for
subwoofer channels, 1 kHz for a midrange application).
Active Crossover: The Slash v2 amplifier provides a
comprehensive crossover network to fine tune your system effectively and
accurately. The variable filter design employed in the Slash v2 amplifier
crossover sections allow you to seamlessly switch slopes, easily change filter
frequencies and address what frequencies the preamp outputs will pass. The
300/4v2 offers the following independent crossover adjustments for the front and
- Filter Mode: The amplifier features a Full-Range, variable
Low-Pass or variable High-Pass filter mode for the amplifier's preamp input
- Variable Frequency: Fully-variable frequency selection from
50-500 Hz on full-range channel filters with frequency range switch in "x1"
position. Selecting "x10" on the frequency range switch multiplies the
filter frequency times ten to allow cutoff frequencies between 500 - 5000
- Switchable Slope on all filters:12dB/octave Butterworth or
24dB/octave Linkwitz-Riley alignments allowing for more precise integration
of subwoofer and speaker channels.
Power and Ground: The JL Audio amplifier's set-screw Power and Ground
connections are designed to accept 8 to 4 AWG power wire.
Remote Turn-On: The Slash v2 amplifier's set-screw turn-on lead will
accept 18 to 8 AWG wire.
Speaker Outputs: The 300/4v2 amplifier's eight set-screw speaker terminals
will accept 16 to 8 AWG speaker wire.
Preamp Inputs: The amplifier features two sets of differential-balanced
RCA jack inputs. The amplifier's input level can be set independently for the
front and rear channels to Low (200mV-2V RMS)
when connecting the amplifier to a low-level preamp signal or set to High
(800mV-8V RMS) when connecting the amplifier to a high-level speaker signal.
Note: All inputs, outputs and controls are located on the front
side of the amplifier to make installation of the amplifier simple and neat.