Specifications
Page 5
D-45 / D-75A Power Amplifiers
Fig. 1.1 Front and Back Views
1 Welcome
Reliability is the first thing you get with your purchase of
a Crown power amplifier. The
D-45
and
D-75A
both de-
liver dependable operation with a wide variety of loads.
Because of their exceptional reliability, these amplifiers
have become the leading choice of professionals for
use in recording studios, laboratories and public facili-
ties. You can even find them on the road. Their sonic
excellence also makes them a very good choice for
your personal listening pleasure.
The
D-45
and
D-75A
amplifiers are compact and pro-
vide ultra-low distortion for medium power applications.
Crown’s advanced AB+B circuitry ensures efficient op-
eration and protects against shorted, open, mis-
matched or low-impedance loads that can affect any
amplifier’s performance. Crown further protects your in-
vestment with the industry’s only three year “No-Fault”
full warranty. After learning about your amplifier’s fea-
tures, facilities and capabilities, you’ll understand why
Crown power amplifiers have long been recognized as
the worldwide standard for audio excellence.
For your protection, please send in your warranty regis-
tration card today and save your bill of sale as it is your
official proof of purchase.
shipping damage. Even if the unit arrived in perfect
condition, as most do, save all packing materials so
you will have them if you ever need to transport the unit.
NEVER SHIP THE UNIT WITHOUT THE FACTORY
PACK.
1.2 Features
Your dual-channel (stereo) amplifier can optionally be
configured to deliver double the power from a single
(mono) channel. It also provides the following features:
❏ Powerful AB+B class circuitry yields maximum efficiency
with minimum crossover “notch” distortion.
❏
IOC
®
(Input/Output Comparator) alerts of any distortion
that exceeds 0.05% to provide
proof of distortion-free
performance
.
❏ Signal presence indicators verify the presence of ampli-
fier output.
❏ Detented level controls for precise repeatability.
❏ Ultra-low harmonic and intermodulation distortion result
in the best dynamic transfer function in the industry.
❏ Very low noise and wide dynamic range exceed the au-
dio specifications for digital compact discs (CDs).
❏ High damping factor provides exceptional loudspeaker
motion control.
❏ Convection cooling system dissipates heat through the
heat sinks and chassis for optimal cooling and mainte-
nance-free operation.
❏ Mounts in a standard 19-inch (48.3-cm) rack.
❏ Three year “No-Fault” full warranty protects your invest-
ment and guarantees the specifications of units in North
America and other select countries.
1.1 Unpacking
Please unpack and inspect your new amplifier for any
damage that may have occurred during transit. If dam-
age is found, notify the transportation company imme-
diately. Only you, the consignee, may initiate a claim for