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Crown International
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com
7/05 136713-1B
Crown’s Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown ampli-
fi er—an unsurpassed industry standard. With this unprecedented No-Fault protection, your new
Crown amplifi er is warranted to meet or exceed original specifi cations for the fi rst three years of
ownership. During this time, if your amplifi er fails, or does not perform to original specifi cations,
it will be repaired or replaced at our expense. About the only things not covered by this warranty
are those losses normally covered by insurance and those caused by intentional abuse. And the
coverage is transferable, should you sell your amplifi er.
See your authorized Crown dealer for full warranty disclosure and details. For customers outside
of the USA, please contact your authorized Crown distributor for warranty information or call
574-294-8200.
“Y” Input: An on/off switch located on
the back panel between the input connectors
which, when turned on, parallels the two
input channels.
Indicators
TLC: A TLC (thermal level control) LED for each
channel which turns on with a dim glow shortly
before the amplifi er needs help dissipating heat.
Clip: An orange LED for each channel which
turns on when distortion of any type becomes
audible in the amplifi er output.
IOC: A yellow LED for each channel which
serves as a distortion indicator. The IOC indi-
cators include a pulse-stretching feature that
helps make them more noticeable even with
rapid transient signals
Signal: A green LED for each channel which
fl ashes dimly when a very low-level signal (as
low as 10 mW) is present in the output. They
fl ash brightly when a louder signal (at least 1
watt) is present at the output.
Enable: A green LED that turns on when the
amplifi er has been turned on and has power.
When fi rst turned on, there will be a brief two-
second delay while the amplifi er performs a
quick turn-on diagnostic. Then the Enable indi-
cator will turn on to its full brightness. If
no signal is present, the Enable indicator
will switch to a dim level.
Input/Output
Input Connectors: One balanced ¼-inch
(6.35-mm) phone jack and one 3-pin female
XLR connector for each channel.
Input Stage: Input is electronically balanced
and employs precision 1% resistors.
Input Impedance: Nominally 20 k ohms, bal-
anced. Nominally 10 k ohms, unbalanced.
Output Connectors: Two sets of color-coded
binding posts for banana plugs, spade lugs
or bare wire (European models do not accept
banana plugs.)
DC Output Offset: ±10 millivolts.
Output Signal
Stereo: Unbalanced, two-channel.
Bridge-Mono: Balanced, single-channel. Chan-
nel 1 controls are active; Channel 2 should be
turned down.
Protection
K-Series amplifi ers are protected against
shorted, open or mismatched loads; overloaded
power supplies; excessive temperature, chain
destruction phenomena, input overload damage
and high-frequency blowups. They also protect
loudspeakers from input/output DC, DC offset
and turn-on/turn-off transients.
TLC protection circuitry protects the amplifi er
from excessive heat by subtly and dynamically
reducing the gain only when necessary to
reduce heat levels. Transformer overheating (an
extremely unlikely event) will result in a tempo-
rary shutdown; when it has cooled to a safe
temperature, the transformer will automatically
reset itself. Controlled slew rate voltage ampli-
fi ers prevent RF burnouts, and input overload
protection is provided by the input current limit.
Out-of-band low-pass and high-pass fi lters pro-
tect the amplifi er and loads from subsonic fre-
quencies below 8 Hz and ultrasonic frequencies
above 30 kHz.
Turn On: State-of-the-art “soft start” feature
prevents the amplifi er from drawing a large
inrush current when it is fi rst turned on and no
dangerous artifacts are produced by the ampli-
fi er. (However it is recommended that all equip-
ment ahead of the amplifi er be turned on fi rst
since they may produce turn-on transients.)
Construction
Cast-aluminum front panel with durable fi nish
and Lexan labels. Aluminum chassis with dura-
ble black fi nish.
Cooling: High-performance passive convection
cooling system allows the amplifi er to drive
2 ohm loads to high music sound levels (6 dB
into clip) in a 40° C (104° F) ambient environ-
ment .
Dimensions: Standard 19-inch (48.3-cm) rack
mount width (EIA RS-310-B), 3.5 inches (8.9
cm) high and 16 inches (40.6 cm) deep behind
front mounting surface.
Net Weight:
K1: 32 lb (14.6 kg).
K2: 38 lb (17.3 kg).
Shipping Weight:
K1: 38 lb (17.3 kg).
K2: 44 lb (20.0 kg).
Center of gravity approximately 6 inches (15.2
cm) behind front mounting surface.
Specifi cations subject to change without prior notice. Latest
information available at www.crownaudio.com.
Crown, Crown Audio, K2 and BCA are registered trademarks
of Crown International. Other trademarks are the property of
their respective owners. Printed in U.S.A.
© 2005 Crown Audio
®
, Inc.
K1
K2