Infinity 54a 4-Ch owner manual Installation c o n t i n u e d, T T I N G T H E C R O S S O V E R

I N S T A L L A T I O N ( c o n t i n u e d )

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., bridged-mono or tri-mode configurations – see Figures 1 through 3 on page 3), connect speaker wires from the speakers to the L and R (+ and –) terminals, as required by your system plan.

5.Make sure the wires are firmly seated in the Weco 5-pin connector and that each screw is completely tightened. Insert the wired Weco 5-pin connector into the 5-pin socket on the amplifier. Press it in until it stops.

6.Connect RCA cables from a source unit to the L and R INPUT jacks.

S E T T I N G T H E C R O S S O V E R . . .

IMPORTANT: If you plan to use the Kappa 54a to drive full-range speakers, set both AMP and AUX filters to FLAT (refer to Figure 1 on page 3 and Figure 8 below) and skip to the next section, “Setting Input Sensitivity”.

1.Set the front and rear CROSSOVER controls to the frequency recommended by the speaker manufacturer (refer to Figure 8). If the value is unknown, set the control midway.

Figure 8. Kappa 54a front and rear controls for crossover, input, and output.

2.Depending on your system plan, set the AMP and AUX switches to LP (low-pass), HP (high-pass), or FLAT (refer to Figure 8).

S E T T I N G I N P U T S E N S I T I V I T Y . . .

Initially, turn the front and rear input sensitivity GAIN controls to their minimum (counter-clockwise) positions (refer to Figure 8).

1.Reconnect the (–) negative lead to your vehicle’s battery. Apply power to the audio system and play a favorite music track from CD or tape.

NOTE: After the source unit is on, green LEDs (on the top panel) will illuminate, indicating the amplifier is on. If not, check the wiring, especially the remote connection from the source unit. Also refer to “Troubleshooting” on the next page.

2.On the source unit, increase the volume control to maximum position. Slowly increase the Front and Rear GAIN controls (clockwise) towards three o’ clock and, at the same time, listen to the quality of the reproduced sound. At some point, you’ll hear distortion on the music peaks. Stop the adjustment and turn it back slightly.

I N S T A L L I N G T H E C O N T R O L C O V E R . . .

After wiring and testing the Kappa 54a amplifier, install the control cover using the enclosed machine screws to deter tampering and help seal out dust.

NOTE: Do not over-tighten the machine screws. Doing so may crack the cover.

Owner’s Manual/Installation Guide – 7