APX_DPX Amps.qxd 2/6/2008 11:53 AM Page 12
English
Cables
•Whenever possible, route power wire and signal wire on opposite sides of the vehicle. This prevents the signal cables from picking up electrically radiated noise.
•Protect all wire from damage. Where a power wire passes through the fire wall or near exposed metal edges, protect the wire with a rubber or plastic grommet. Use wire loom where possible for further protection.
•Extra cable can cause signal loss and act as an antenna for noise. Use only high quality RCA cables that are no longer than necessary to make a direct connection with the source unit and amplifiers.
•Make sure each connection is clean and secure. Insulate final connections with electrical tape or shrink tubing.
CAUTION
Improper connections may result in unreliable operation and damage the amplifier or the vehicle.
Grounding the amplifier
•A good chassis ground connection is critical to minimize resistance and avoid noise problems.
Use the shortest wire possible. Clean off any paint, primer or sound deading prior to making this connection.
To minimize resistance and avoid noise problems, securely connect the ground wire to the car chassis and the source unit ground. Using existing bolts is not recommended.
External fuse rating table
Model | Fuse rating |
|
|
APX2181 | 30 Amp |
APX4361 | 50 Amp |
DPX2251 | 50 Amp |
DPX1851 | 90 Amp |
DPX11551* | 200 Amp |
*This amplifier has no amplifier- mounted fuses. Always use a 200 Amp fuse installed at the battery.
•The last connection you make should
be the ground wire at the amplifier. As the
power supply capacitors in the amplifier are not charged, a spark may be produced when you make this connection.
Use a test light with an incandescent bulb between the ground terminal and the power wire to charge these capacitors if this is a concern. The ground wire is the most important connection to the amplifier. Make sure it is both electrically and mechanically sound.
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