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Owner’s Manual/Installation Guide – 7
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 ETTING THE CROSSOVER...
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.
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 ETTING INPUT SENSITIVITY...
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 NSTALLING THE CONTROL COVER...
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.
INSTALLATION (continued)
Figure 8. Kappa 54a front and rear controls for crossover, input,
and output.