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Placement of Your HCA-2003
Place your HCA-2003 away from heat sources such as air ducts or radiators. Always mount the
HCA-2003 horizontally and make sure that your cabinet or shelf can support its weight. It is best to
provide a separate shelf for your HCA-2003 rather that stacking it directly above or below your other
components.
Rack Mounting Your HCA-2003
Your HCA-2003 can be mounted into a standard 19 inch equipment rack and will occupy four rack
spaces. If you decide to rack mount your HCA-2003, make sure you select heavy duty mounting bolts
and nuts and use nylon washers under the heads of the bolts to avoid scratching the amplifiers front
panel. Do not attempt to hold your unit in place yourself while you attach the bolts and nuts. Have
someone help support the unit as it is being fastened to the rack rails.
Ventilation Requirements for Your HCA-2003
Your Parasound power amplifier is designed to operate with high idling, or bias, current to reduce
higher-order harmonic distortion. This bias optimization of all Parasound power amplifiers results in
noticeably warm operation even when no signal is present. This is a normal condition. While many
other amplifier manufacturers have chosen to bias their amplifiers at a lower level to run cooler, we
bias our amplifiers so the output transistors are allowed to operate in a much more linear region.
Although the amplifier may run a little warmer than other amplifiers, we feel the resulting sonic
improvements are significant and more than justified.
To insure safe and reliable operation, it is very important that the amplifier has plenty of ventilation to
prevent overheating and automatic shut down from its thermal protection circuitry. Please observe the
following ventilation guidelines when installing your Parasound power amplifier in a cabinet or other
enclosed area:
1. If you are not using a fan, allow at least six inches on each side and above the amplifier, and
do not close off the front with a cabinet door or panel.
2. If you are enclosing the amplifier in an equipment cabinet, use a fan to draw in cool air and
exhaust warm air. In either case, two vent holes are required: one for intake and one for exhaust.
3. Do not place the amplifier on carpeting which will obstruct the air flow into the bottom of the
amplifier chassis and heatsinks.
4. If you plan on stacking power amplifiers, you must use a fan to circulate the warm air that quickly
becomes trapped between them.
Minimum Impedance Precautions
You may connect loudspeakers with a 4
W or 8 W nominal impedance for normal operation. Your
HCA-2003 is capable of driving speakers with occasional impedance dips well below 2
W. However,
sustained high power operation into loads of less than 4
W may cause overheating and is not
recommended.
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HCA-2003 Front and Rear Panel Drawings
Current Overload
CH 1CH 2CH 3 Power
Operation
Stand by
HCA-2003 High Current Multi Amplifier LUCASFILM LUCASFILM
Power Switch
Standby/Operation
LEDsCurrent Overload LEDsRack
Mount Holes Carry Handle
Figure #2 HCA-2003 Front Panel Figure #1 HCA-2003 Rear Panel
HCA - 2003High Current Multi-Amplifier
Parasound Products, Inc
San Francisco, CA U.S.A.
Power Consumption: 1320 W CAUTIONRISK OF ELECTRIC SHOCK
DO NOT OPEN
Fuse 15 A
Power
AC 120V 60Hz
Input
Channel 1
Main Fuse
AC Cord Connector
Carry Handle
Input
Channel 2
Input Channel 3
Channel 1 Channel 2 Channel 3
Input Connectors
and Level Controls
Speaker Connectors
THX
Level THX
Level THX
Level
LUCASFILM
Manufactured under license
from LucasArts Entertainment
Company. U.S. and Foreign
Patents pending. Lucasfilm
THX Audioand Home THX
Symbols are Trademarks of
LucasArts Entertainment
CompanyLucasfilm is a
Trademark of Lucasfilm Ltd.
CAUTION:
TO PREVENT ELECTRIC SHOCK,
DO NOTREMOVE COVER. NO USER
SERVICEABLEPARTS INSIDE. REFER
SERVICING TOQUALIFIED SERVICE
PERSONNEL. WARNING:
TO PREVENT FIRE OR SHOCK
HAZARD.DO NOT EXPOSE THIS
UNIT TO RAINOR MOISTURE.
