Directed Electronics 500 owner manual INSTALLATION GUIDELINES continued

INSTALLATION GUIDELINES (continued)

is generated. For low impedance speaker applications or restricted ventilation installations, an external cooling fan may be advisable.

9.Your connections to the amplifier’s speaker and power terminals should be made with crimped spade lugs, and the battery and ground connections to the vehicle should be made with crimped ring terminals of the appropriate size (surface area is what counts); soldering the terminals after crimping is also recommended.

10.Due to the high-frequency MOSFET switching power supply used in all Directed Audio amplifiers, filtering the power cable is not generally required (remember that the amp can’t deliver full output if the power supply is restricted). Proper grounding of the signal source is mandatory for the amplifier to reach its performance peak. If the RCA inputs are not grounded adequately via the signal source, electrical noise from the vehicle may be picked up in the system.

© 1999 Directed Electronics, Inc 3