JL Audio HD900/5 - Manual (Page 3)

3
cooling efficiency considerations:
Your JL Audio amplifier employs an
advanced type of heat management, called
RealSink™. This feature takes advantage of
convection and radiation effects to remove
heat from the amplifier circuitry. For optimum
cooling performance, the vertical heat sinks
located at the sides of the amplifier should be
exposed to as large a volume of air as possible.
Enclosing the amplifier in a small, poorly
ventilated chamber can lead to excessive heat
build-up and degraded performance. If an
installation calls for an enclosure around the
amplifier, we recommend that this enclosure
be ventilated with the aid of a fan. In normal
applications, fan-cooling is not necessary.
If mounting the amplifier under a seat,
make sure there is at least 1 inch (2.5 cm) of
space above the amplifier’s outer shell to permit
proper cooling.
Filter Frequency
Selector
(pg. 11)
Filter Frequency
Selector
(pg. 10)
Input Voltage
Selection
(pg. 9)
Infrasonic Filter
Selector
(pg. 11)
Input Sensitivity
Control
(pg. 10)
Input Mode
Selection
(pg. 9)
Filter Slope
Selection
(pg. 11)
Filter Frequency
Selector
(pg. 11)
Input Sensitivity
Control
(pg. 10)
Filter Slope
Selection
(pg. 11)
Input Sensitivity
Control
(pg. 10)
Power Status
Indicator
(pg. 15)
Filter Slope
Selection
(pg. 11)
Left & Right
Input Jacks:
Subwoofer
(pg. 9)
Left & Right
Input Jacks:
Front Channels
(pg. 9)
Speaker Outputs
(pgs. 13-14)
Jack for
Remote Level
Control Knob
(pg. 13)
Left & Right
Input Jacks:
Rear Channels
(pg. 9)
Chassis Ground
Connector
(pgs. 6-7)
Remote Turn-On
Connector
(pgs. 6-7)
+12 V Power
Connector
(pgs. 6-7)
safety considerations:
Your amplifier needs to be installed in a dry,
well-ventilated environment and in a manner
which does not interfere with your vehicle’s safety
equipment (air bags, seat belt systems, ABS brake
systems, etc.). You should also take the time to
securely mount the amplifier using appropriate
hardware so that it does not come loose in the
event of a collision or a sudden jolt to the vehicle.
stupid mistakes to avoid:
• Check before drilling any holes in your vehicle
to make sure that you will not be drilling
through a gas tank, brake line, wiring harness or
other vital vehicle system.
• Do not run system wiring outside or underneath
the vehicle. This is an extremely dangerous
practice which can result in severe damage to
your vehicle and person.
• Protect all system wires from sharp metal
edges and wear by carefully routing them,
tying them down and using grommets and
loom where appropriate.
• Do not mount the amplifier in the engine
compartment, under the vehicle, on the roof
or in any other area that will expose the
amplifier circuitry to the elements.