Full Power Balanced amplifiers are easy to
install and operate. However, it is important to
exercise care during operation, due to the
amplifiers’ enormous power output. Switching
between active sources (such as a CD player,
tape monitor, or VCR) without muting the pre-
amplifier output, or bumping or miscuing a
source can generate large transients at low fre-
quencies. Full Power Balanced amplifiers may
generate enough power with these transients
to damage loudspeakers.
If the Krell CAST input is being used, the
Krell CAST red LED illuminates and
remains illuminated at all times during the
stand-by or power on modes.
. With the preamplifier muted or volume con-
trol completely lowered, select a source.
Increase the volume control to the desired
. When turning off the system, mute or com-
pletely lower the preamplifier volume, or
place the Full Power Balanced amplifier in
the stand-by power mode by pressing the
power button on the front panel. It is now
safe to turn off the rest of the system.
Always mute or fully attenuate the preamplifier
level when switching sources.
Do not change input connections to the amplifi-
er when the amplifier is on.
For best performance of Full Power Balanced
amplifiers, leave the back panel power breaker
switch on at all times.
Use care when setting high playback levels.
Because of their tremendous reserves of clean
power, Full Power Balanced amplifiers can safe-
ly drive speakers to higher sound pressure lev-
els than other amplifiers. Always lower the vol-
ume level at the first sign of speaker distress.
KRELL LINK OPERATION
1. When all components are linked, place
each component in the stand-by mode by
moving the back panel power breaker
switch to the up position. This ensures that
all components will be synchronized when
signals from the control component are sent
to the linked components in the system.
ON/OFF AND STAND-BYOPERATION
When powering on any system, turn on ampli-
fiers last. Turn off amplifiers first.
1. Move the back panel power breaker switch
. When the components are in stand-by,
switch the control component to the opera-
tional mode from the control component’s
front panel or by using the component’s
to the up position to engage the input cir-
cuitry and place the amplifier into the stand-
by mode. The front panel blue power stand-
by LED illuminates.
. Press the silver power button on the amplifi-
er front panel. The blue regulator LED illumi-
nates. Once the regulator provides power to
the output stage, the blue bias LED illumi-
nates. The Sustained Plateau Bias II system
is now engaged.After the protection circuitry
has confirmed that safe operating conditions
exist, the input relays engage. You hear a
click. The amplifier is ready for operation.
The linked components switch to the oper-
ational mode simultaneously.
A linked component can be switched between
the operational mode and stand-by, individual-
ly, from its front panel. Switching a linked com-
ponent temporarily breaks the chain of linked
components. To re-establish linked operation,
return all components to stand-by.
Krell Full Power Balanced X Series Power Amplifiers