54a 4-Ch Power Amplifier Owner’s Manual Installation Guide
KAPPA 54A POWER AMPLIFIER The Kappa 54a is a member of Infinity’s new Kappa series of mobile power amplifiers. Housed within the sleek, extruded aluminum frame, you’ll find the latest advances in circuit topology, along with user conveniences like a widerange input sensitivity control, auxiliary outputs, and a built-in electronic crossover.
APPLICATIONS For your convenience, we’ve included several application diagrams to help you plan your own system installation. Figures 1 through 3 show how to configure the Kappa 54a for stereo, bridged-mono, and tri-mode operation. Figure 1. This wiring diagram shows a Kappa 54a amplifier driving front and rear pairs of full-range speakers. Set Front Mode To STEREO Set Rear Mode To STEREO (on top panel) (on top panel) For system expansion ideas, see the next page.
SYSTEM EXPANSION KAPPA 54a 5 1 ⁄4" Speakers (Hi-Pass, F & R) - - + + - - + + L/R Inputs Figure 4. In this example system, a Kappa 54a drives front and rear pairs of 5 1⁄4" speakers. The 54a’s stereo front and rear outputs are summed to feed a bridged-mono Kappa 202a that drives a single 12" subwoofer. L/R Outputs (F+R Sum) Front Rear KAPPA 202a 12" Subwoofer L/R Inputs + 5 1 ⁄4" Speakers Rear (Hi-Pass) KAPPA 54a + L/R Inputs Figure 5.
PRECAUTIONS AND NOTES • The Kappa 54a has five levels of circuit protection that monitor the amplifier and will shut it down if the electrical system voltage drops below 10 Vdc or exceeds 15.5 Vdc, temperatures are above 194° F (90° C), short circuits occur, or current draw exceeds product specifications. For best performance, check the intended mounting site to make sure the operating environment does not create conditions that will trigger circuit protection.
INSTALLATION The Kappa 54a is easy to install. For optimum performance, we recommend using high-quality, twistedpair shielded RCA audio cables and 14-gauge or larger speaker wire. Also, you’ll need a minimum of 12-gauge stranded copper wire (e.g., red and black jackets) for the power connections. Use 18-gauge (e.g., blue jacket) wire for remote turn-on. MOUNTING THE AMPLIFIER...
INSTALLATION (continued) 3. Make sure the wires are firmly seated in the Weco 2-pin connector and that each screw is completely tightened. Insert the wired connector into the POWER socket on the amplifier. Press it in until it stops. 4. Using the Weco 5-pin connector, connect a blue wire from the source unit’s remote connection to the REM terminal. Depending on polarity requirements (e.g.
TROUBLESHOOTING Use the following guide to identify symptoms and solve problems. Make sure the vehicle’s electrical system is working properly and power is reaching the Kappa 54a (i.e., green LEDs on the top panel are on).
