8-Channel Full-Range Amplifier: The JL Audio M800/8v2 is an
eight-channel, Class-D marine amplifier utilizing NexD ultra-high speed switching
technology to deliver outstanding fidelity and efficiency. The M800/8v2 can be
operated with a wide variety of source units and system configurations.
Marine Amplifier: The JL Audio M-series marine amplifiers
are specifically designed for marine applications. These amps are not waterproof,
however, and should not be mounted where they are likely to get wet.
Amplifier Rating: The M800/8v2 is rated at 75 Watts RMS x
8-channels at 14.4 volts, into 4Ω, measured from 20 to 20,000 Hz, with a
signal-to-noise-ratio of 104 dB and THD+Noise of less than 1%.
NexD Class D Technology: NexD is a switching amplifier design
that maintains audio quality and efficiency with less complexity.
Advanced Rollback Protection: The M-Series amplifiers employ
advanced thermal and low-impedance protection to virtually eliminate amplifier
shut-down events. Should any M-Series amplifier overheat, its intelligent
unregulated power supply reacts by limiting the available peak voltage until
the amplifier returns to a safe temperature range. Likewise, if an impedance
lower than optimal for the amplifier is present at the outputs, the M-series
amplifier will roll back peak voltage to protect itself without shutting down.
Differential-Balanced Inputs: The 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 connect
most source units directly 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 12-volt audio installation.
Note: You will need (up to) four speaker wire-to-RCA adapters (item number
sold separately) to connect this amplifier to your headunit's speaker level output.
Protection Circuitry With Status Indicator Lights: There
is a single multi-color LED on the top panel of the amplifier to indicate the
amplifier's operating status.
- Flashing Green: the amplifier is powering
up and audio output is muted
- Constant Green: the amplifier is turned on
and operating normally
- Constant Red: indicates the amplifier has
exceeded its safe operating temperature, putting the it into a
self-protection mode, which reduces the power output; the red
light will turn off and the amplifier will return to normal,
full-power operating mode when the heat sink temperature drops
back to a safe level
- Constant Amber (Yellow): indicates an
over-current condition (short), accompanied by a muting of
the amplifier's output
- LED Off: the only condition that will
shut down an undamaged M800/8v2 completely is the battery
voltage or remote turn-on voltage dropping below 10 Volts;
will turn back on when voltage climbs back above 11 Volts
Control Panel Cover: The M800/8v2 features a gasketed control
panel cover to protect and hide the amplifier's controls. When installed, the cover
protects the amp from the occasional splash and ensures the settings are not
accidentally changed. The cover is installed at the factory and must be temporarily
removed to access the amplifier's controls. It is secured by two 2.5mm Allen head
Simplified Gain Setting: This M-series amplifier has independent
gain controls for channels 1&2, 3&4, 5&6, and 7&8. JL Audio makes
setting the gain levels of the amp simple, using a Digital AC Voltmeter and a test
signal (CD item number
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).
Crossover: Each pair of channels has independent crossover
circuits with separate controls:
- Mode: select Low Pass, High Pass, or
Off (full-range) operation
- Frequency: each crossover point is
variable from 49 Hz to 483 Hz (labeled 50 Hz to 500 Hz
on the amp)
Input Mode: A three position switch lets you assign what RCA
inputs are used:
- 2-Channel: inputs 1&2 send signal
to all eight amplifier channels
- 4-Channel: inputs 1&2 feed amplifier
channels 1&2 and 3&4; inputs 5&6 feed amplifier
channels 5&6 and 7&8
- 8-Channel: each amplifier channel has
a dedicated input
Input Voltage: The input voltage range is switchable:
- High: gain settings vary from 800mV
to 8V; typically used for speaker level inputs
- Low: gain settings vary from 200mV
to 2V; typically used for line level inputs
Remote Level Mode: If an optional HD-RLC wired remote is added,
you can assign what amplifier channels it controls; all channels, channels 5-8, or
Turn-on Mode: A three position switch lets you choose the
method for turning the amplifier on and off:
- Remote: preferred method; when +12V
is present at the remote terminal, the amplifier turns on;
when the +12V is removed, the amplifier turns off
- Offset: the amplifier will turn on with
the presence of a small DC signal (or offset) detected on the
channel 1 input; designed for speaker-level input signals
- Signal: the amplifier will turn on with
the presence of a full-range audio signal at the channel 1
input; it will turn off approximately 30 seconds after the
audio signal is no longer detected; designed for speaker-level
Note: When the DC Offset or Signal Sensing
turn-on methods are being used, the amp's Remote terminal can
be used as a remote turn-on output for other amplifiers or
accessories in the system.
Power/Ground/Turn-On Terminals: The amplifier features screw
clamp terminals for the power, ground, and remote turn-on connections.
- Power and Ground: accept 4 gauge wire
(4 gauge recommended for power and ground); tighten/loosen
with the included 2.5mm Allen wrench
- Remote Turn-On: accepts 18 to 8 gauge
wire; tighten/loosen with the included 2.5mm Allen wrench
Note: The Amplifier is not equipped with
a fuse. An external 80-amp AFS, AGU, or MAXI fuse (not
included) must be installed on the power wire. If a wiring
kit is used which includes a fuse with a value other than
80-amps, the original should be replaced with a 80-amp fuse.
Speaker Output Terminals: The eight pair of screw clamp speaker
terminals will accept 16 to 8 gauge wire. Use the included 2.5mm Allen wrench to
tighten/loosen the connection.
Preamp Inputs: The amplifier features four sets of
differential-balanced RCA jack inputs. Each pair has a dedicated input
sensitivity control (channels 1&2, 3&4, 5&6, and 7&8).
The gains can be set between 200mV and 8V.
Remote Level Control: The amplifier features an RJ-14
telephone jack for adding an optional wired remote level control (item number
sold separately). A switch on the amp's control panel sets what channels the
wired remote controls, All, 5-8, or 7 and 8. This is useful for subwoofer level
control or even as a master volume control for your system. If desired, multiple
M-series amplifiers can be controlled from a single HD-RLC controller using a
simple phone line splitter and multiple phone cables (all sold separately).
Note: All inputs and outputs are located
on one side of the amplifier to simplify installation.