Clarion APX640.4 - Manual (Page 4)

APX640.4/640.2/320.2/DPX1001.1
PRECAUTIONS
4
INSTALLATION
This section lists mounting and wiring precautions prior to installing the Clarion
amplifier. These safeguards provide enough detail to complete an installation suc-
cessfully. Do not attempt to install the amplifier yourself, if you do not have the nec-
essary skills. Instead, see your authorized Clarion dealer for installation recommen-
dations.
MOUNTING PRECAUTIONS
Although the Clarion amplifiers incorporate heat sinks and protection circuits, mount-
ing the amplifier in a tight space without any air movement will result in damage to
the amp’s internal circuitry over time. Choose a site that provides adequate ventila-
tion around the amplifier. For easy system setup, mount the amplifier so the front-
panel controls are accessible after installation.
In addition, observe the following precautions:
1. For the most efficient cooling, mount the amplifier so cool air runs along the length
of the fins rather than across them. Remember, any moving air will dissipate heat.
2. Mount the amplifier on a rigid surface. Avoid mounting to subwoofer enclosures or
areas prone to vibration. Do not install the amplifier on plastic or other combustible
materials.
3. Prior to drilling, make sure proposed mounting holes will not cut into the fuel tank,
fuel lines, brake lines (under chassis), or electrical wiring.
WIRING PRECAUTIONS
Read all wiring precautions. If you are not sure of the connections, contact your
authorized Clarion dealer.
1. Before installation, make sure the source unit’s Power switch is in the OFF posi-
tion.
2. Disconnect the negative (-) lead of the battery before making any power connec-
tions.
3. When making connections, be sure that each connection is clean and secure.
Insulate final connections with electrical tape or shrink tubing. Failure to do so may
result in damage to your equipment.
4. A secure, clean ground connection is critical to the performance of your Clarion
amplifier. Use the shortest ground wire possible and securely connect to the vehicle’s
chassis to minimize resistance and avoid noise problems. Be sure to clean off any
paint prior to making this connection.
5. Add an external fuse on the amplifier’s positive (+) power lead and connect it as
close as possible to the vehicle’s (+) battery terminal. Use a fuse rated to the total cur-
rent consumption of the amplifier(s). Adding an external fuse will protect the electri-
cal system from short circuits that can result in a fire.
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