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K Series Power Amplifiers
Operation Manual
NOTE: For detailed information about these Crown
amplifier features, please consult the Crown Amplifier
Application Guide, available on the Crown website at
www.crownaudio.com.
5.1 Protection Systems
Your Crown amplifier provides extensive protection systems,
including protection against shorted outputs, open circuits, DC,
mismatched loads, general overheating, high-frequency over-
loads and internal faults.
5.1.1 TLC
If the amplifier starts to overheat, the thermal level control system
will subtly and dynamically reduce the gain as needed. Trans-
former overheating (extremely unlikely) will result in a temporary
shutdown. When the amplifier has cooled to a safe temperature,
the transformer will automatically reset itself.
5.1.2 Out-of-band Filtering
An 8-Hz high-pass filter protects the amplifier and loads from
subsonic frequencies. A 30 kHz low-pass filter offers protection
from ultrasonic frequencies.
5.1.3 Inrush Limiting
The “soft-start” feature prevents the amplifier from drawing a
large inrush current when it is first turned on.
5.1.4 Fuse
A fuse is provided to protect the power supplies from excess cur-
rent. It is located on the back panel below the power cord.
K-Series amplifiers that are configured to use 100-120 VAC
power should use the following fuses:
K2: 20-amp fuse.
K1: 15-amp fuse.
K-Series amplifiers that are configured to use 200-250 VAC
should use the following fuses:
K2: 10-amp fuse.
K1: 8-amp fuse.
5.2 Advanced Features
• BCA (Balanced Current Amplifier) technology allows high
levels of power output without all the associated heat found
in a conventional amplifier. This highly efficient design
works without using a cooling fan.
• Accurate, uncolored sound with very low distortion.
• High damping factor for tight, clean bass response.
• Advanced design for energy conservation.
• Versatile, handling a wide range of speaker impedances and
outputs.
• Switchable input sensitivity.
• “Soft Start” feature prevents the amplifier from drawing large
currents when it is first turned on.
• Can be mounted in standard 19-inch (48.3-cm) rack.
Uniquely molded, cast-aluminum front panel provides
exceptional air circulation.
• Advanced protection circuitry guards against shorted out-
puts, open circuits, DC, mismatched loads, general over-
heating, high-frequency overloads and internal faults.
• Mono mode switches allow you to set up your amps/speak-
ers in the configuration that best suits your needs, with
combined amp inputs, combined amp outputs, or both.
• Backed by the industry’s ONLY three-year, no-fault, fully
transferable warranty.
5 Advanced Features
