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12 VDC REMOTE POWER OUT
This output sends 12 volt power on/off sig-
nals to other Krell
®
components, as well as
other devices that incorporate a 12 volt
power on/off trigger input. This allows for
remote turn on/off of the KAV-150a with the
power activation of another Krell
®
compo-
nent as well as with other components used
in a custom installation.
Note
Consu/t the owner’s manua/ of any device
used in a custom insta//ation to take furl
advantage of the remote capabi/ity of the
KAV-150a.
CONFIGURING THE KAV-150a
FOR BRIDGED OPERATION
The KAV-150a may be configured to operate
in a bridged mode. To implement this configu-
ration:
1. Turn the KAV-150a off.
2. Locate the red switch on the back of the
amplifier and slide it from the NORMAL
position to the BRIDGED position. The
numera/ 2 will appear on the switch, when
the switch is in the BRIDGED position.
3.
Connect the interconnect cable to the
BRIDGED input, either balanced via the
XLR connector or single-ended via the
RCA connector. Do not use both inputs
simultaneously. Connect the speaker
cables to the speaker terminals labeled
BRIDGED(-) and BRIDGED(+). The
lifier is now ready for bridged operation.
Amplifier Operation
It is easy to understand the operation of the
KAV-150a amplifier. However, great care
needs to be exercised when operating a sys-
tem that includes the KAV-150a, because of
the amplifier’s enormous power output.
Switching between active sources without
muting the preamplifier output, or bump-
ing/miscuing a cartridge, can generate large
transients at low frequencies. The KAV-150a
amplifier may generate enough power with
these transients to .damage most loudspeak-
ers. All switching of sources should be done
with the preamplifier level either muted or fully
attenuated. Do not change inputs to the ampli-
fier while the amplifier is on.
Note
Care must be taken when setting high p/ay-
back leve/s. Because of their tremendous
reserve of c/ean power, Kre//~ amp/ifiers
can safe/y drive speakers to higher sound
pressure /evels than other amplifiers.
A/ways turn the/eve/down at the first sign
of speaker distress.
ON/OFF AND STANDBY OPERATION
When powering up any system, amplifiers
should always be turned on last and turned off
first.
1. Press the power button on the front panel
of the KAV-150a Power Amplifier.You will
hear a click. The amplifier is ready for
operation.
2. With the system preamplifier in the mute
position, or the volume control fully atten-
uated, select a source. Turn the volume
control up to the desired listening level.
3. When .turning the system off, lower the
volume of the system preamplifier com-
pletely or place it into the mute or stand-
by position. Turn the KAV-150a off. It is
now safe to tum off the rest of the system.
Page 6 of 12 English KRELL® KAV-150a