Mono-Channel Subwoofer Amplifier: The JL Audio 500/1v2 is a class D
monoblock subwoofer amplifier that is rated at 500 Watts RMS x 1-channel in
1.5 to 4-ohm at 20 to 250Hz with a signal-to-noise-ratio of 95 dB and a total
harmonic distortion of 0.05% while receiving 11 to14.5 Volts. The JL Audio
subwoofer amplifier's frequency response is limited to the range of 5-250Hz and
is not designed for driving midrange speakers or tweeters. Every aspect of the
amplifier's operation has been optimized for low-frequency amplification.
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.
Class D Circuitry: This JL Audio Class D subwoofer amplifier utilizes
a proprietary Class D circuit. JL Audio's Patented Class D output circuit
utilizes a discrete control section and a unique feedback loop design that
results in outstanding power regulation and a damping factor greater than 500 at
4 ohms (>250 at 2 ohms). This is vastly higher than other Class D designs and
also higher than most Class A/B amplifiers. The benefit of this exclusive JL
Audio technology is tight, clean bass reproduction with the efficiency advantage
of Class D amplification.
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 a speaker wire to RCA adaptor (136XDCLR2S,
sold separately) to connect this amplifier to your headunit via
Flexible Preamp Outputs: The Slash v2 amplifier features flexible
preamp outputs that make interconnecting multiple amplifiers simple. The 500/1v2
subwoofer amplifier features fully-independent preamp output filters with
independent frequency (40-200 Hz), mode (LP or HP) and slope-selection controls
(12 or 24 dB). The preamp outputs can also be configured to track the
amplifier's low-pass filter directly or as full-range outputs.
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
500/1v2 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
Active Crossover: The Slash v2 amplifiers provide 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 500/1v2 offers the
following crossover adjustments.
- Filter/Slope Mode: The amplifier features low-pass 12dB/octave Butterworth or
24dB/octave Linkwitz-Riley alignments allowing for more precise integration
of subwoofer. You can also turn the amplifier's filter mode off.
- Variable Frequency: The amplifier offers fully-variable frequency
selection from 40-200 Hz on subwoofer channel filters with a detented
frequency selection potentiometer for precise adjustment by sight or feel.
Bass Controls: The bass control functions on the JL Audio subwoofer
amplifier include the following.
- Variable Bass Boost: The amplifier's variable bass boost features
a single, parametric band of equalization with variable "Q" (0.5 - 4.3),
center frequency (20 - 80 Hz), and boost (0 to +15dB).
- Infrasonic Filter: This filter is a defeatable, fully-variable
24dB/octave infrasonic filter with adjustable cutoff frequencies from 15-60
Hz. Ultra-low frequencies that cannot be reproduced by a subwoofer do not
become sound but become unnecessary oscillations, which affect sound by
causing distortion. These frequencies also waste amplifier power and can
cause damage to speakers. Setting the Infrasonic filter switch between
15-60Hz cuts the frequencies below the respective frequency to improve the
reproduction performance of the speakers by eliminating harmful distortion.
- Remote Bass Port: The amplifier is equipped with a connection for
a wired Remote Bass Control (136RBC1, sold separately) that allows fully
variable boost control from the front of your vehicle.
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 500/1v2 amplifier's set-screw speaker terminals
will accept 16 to 8 AWG speaker wire.
Note: If your headunit does not have a dedicated remote turn-on
output, the amplifier's turn-on lead can be connected to a +12V via a switch
that drives power from an ignition-switched circuit. To use this method,
select "off" on the "signal sensing" switch of the amplifier's input
Preamp Inputs: The amplifier features one set of differential-balanced
RCA jack inputs. The amplifier's input level can be set 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.
Preamp Outputs: The amplifier also features one set of preamp outputs
so you can send audio to another amplifier in your system. The preamp output is
switchable and can be set to a Full-Range, Amp Filter or Out Filter.
Note: All inputs, outputs and controls are located on the front
side of the amplifier to make installation of the amplifier simple and neat.