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BRIDGED OPERATION
The KAV-250a and the KAV-250a/3 can be reconfigured for bridged operation. When
the KAV-250a amplifier’s channels are bridged, the amplifier’s output power is
quadrupled: the amplifier delivers 1,000 Watts to an 8 Ohm load. The KAV-250a/3 can
be reconfigured to bridge any two of its three amplifier channels to operate as one
combined amplifier channel. When using the bridged amplifier channel only, the
KAV-250a/3 delivers 1,000 Watts to an 8 Ohm load.
Inputs and outputs labeled left and right are on the left and right side of the amplifier,
respectively, when viewing the amplifier from the front panel
Reconfiguring the KAV-250a for Bridged Operation
See Figure 5 on page 16
Tools needed: T-15 Torx wrench and one ribbon connection cable
1.
Turn the KAV-250a off by pressing the power button (1) on the front panel. The blue
power LED (2) extinguishes. Unplug the AC power cord from the IEC power
connector (13) on the back panel.
2. Using the T-15 Torx wrench, remove the 12 screws that secure the amplifier cover.
Carefully remove the cover.
3.
Locate the small PC board at the rear of each amplifier channel and jumper pins
labeled J4, J5, and J6.
4.
Connect one end of the ribbon connection cable to jumper pin J4 on the left
amplifier channel (closest to the power supply). The cable snaps into place. Connect
the other end of the ribbon connection cable to jumper pin J6 on the right amplifier
channel.
5.
Replace cover (slide front panel end in first). Using the T-15 Torx wrench, secure
the 12 screws.
The KAV-250a amplifier is now ready for bridged operation.
Connecting the Bridged KAV-250a
See Figure 2 on page 6
1. Connect the output cable from the output device to the balanced XLR (4
/
or the
single-ended RCA (6) inputs connectors marked (BRIDGED ~NPUT).
2. Connect the positive loudspeaker lead (red) to the positive binding post on the left
amplifier channel output (8), marked BRIDGED (+). Connect the negative loudspeaker
lead (black) to the positive binding post on the right amplifier channel (7), marked
BRIDGED (-).
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KAV-250a and KAV-250a/3 Amplifiers