Crown International
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 219-294-8200
FAX: 219-294-8FAX
www.crownaudio.com
06/01 133377-1
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
219-294-8200.
PT 3.1
Specifi cations subject to change without prior notice. Latest infor-
mation available at www.crownaudio.com.
Crown, IOC, ODEP and Grounded Bridge are registered trademarks
of Crown International. Other trademarks are the property of their
respective owners. Printed in U.S.A.
© 2001 Crown Audio, Inc.
Indicators
Enable: This red indicator shows the on/off
status of the low voltage power supply.
Signal/IOC: Each channel has a two color indi-
cator that fl ashes green to show signal pres-
ence and yellow if the amplifi er causes distor-
tion of 0.05% or more.
Input/Output
Input Connector: Balanced 1/4-inch phone
jacks and XLR connectors in parallel.
Input Impedance: Nominally 20 K ohms, bal-
anced; 10 K ohms, unbalanced.
Output Connector: Two sets of color-coded
binding posts.
Output Impedance: Less than 10 milliohms in
series with less than 2 microhenries.
DC Output Offset: Less than 10 millivolts.
Output Signal
Stereo: Unbalanced, two-channel.
Bridge-Mono: Balanced, single-channel. Chan-
nel 1 controls are active; Channel 2 controls
should be turned down and not used.
Parallel-Mono: Unbalanced, single-channel.
Channel 1 controls are active; Channel 2 con-
trols should be turned down and not used.
Protection
Power-Tech .1 Series amplifi ers are protected
against shorted, open or mismatched loads;
overloaded power supplies; excessive tempera-
ture; chain destruction phenomena; input over-
load and high-frequency blowups. They also
protect loudspeakers from input and output DC,
as well as providing protection from turn-on/
turn-off transients.
If operating conditions are unreasonable, the
patented ODEP circuitry proportionally limits
the drive level to protect the output transistors,
particularly in the case of elevated temperature.
A thermal switch imbedded in the transformer
protects the power supplies from overload. In
the rare event that a transformer overheats, the
thermal switch removes power, waits until the
unit has cooled to a safe temperature and then
resets itself.
Turn On: Four-second delay with no dangerous
transients. Contact us if you need to change
the delay.
Construction
Durable black fi nish on steel chassis with spe-
cial “fl ow-through” ventilation from front to
side panels.
Cooling: Internal heat sinks with forced-air
cooling for rapid, uniform heat dissipation.
Dimensions: Standard 19-inch (48.3-cm) rack
mount width (EIA RS-310-B), 3.5-inch (8.9-cm)
height and 16-inch (40.6-cm) depth behind the
mounting surface.
Approximate Weight: Center of gravity is 6
inches (15.2 cm) behind front mounting sur-
face.
120 VAC, 60 Hz Units: 36 pounds, 8 ounces
(16.6 kg) net; 40 pounds, 8 ounces (18.4 kg)
shipping weight.
International Units: 37 pounds, 3 ounces (16.6
kg) net; 40 pounds, 15 ounces (18.6 kg) ship-
ping weight.
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