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6
Precautions
Before using the DTA-9.4 power amplifier, be sure to read the page
above entitled Important Safeguards and this page of precautions.
Ventilation
While using the DTA-9.4, the internal temperature will fairly rise.
Excessive temperature rise may affect the amplifier performance.
To prevent damage from occurring due to high internal
temperatures, it is vital to have proper ventilation and passage of air
to carry out the heat and keep the internal temperature within
acceptable ranges.
Caution
• Do not place the DTA-9.4 inside cabinets or closets where there
is poor passage of air and ventilation.
• Do not place the DTA-9.4 near external heat sources such as
heaters or hot air ducts.
• Do not place other components or object on top of or under the
DTA-9.4.
• The cover of the DTA-9.4 contains ventilation holes to allow the
passage of air. Do not cover or block these holes in any way.
If you are planning to place it within a cabinet, either open holes in
the rear panel of the cabinet to improve ventilation or use a fan to
force air circulation.
As a general rule, if during idling the cover is too hot to touch, then
ventilation needs to be improved.
Installation location and space
Make sure that the floor or cabinet or rack where it will be located is
strong enough to support its weight.
You will also need to leave enough space behind the DTA-9.4 to
allow room for the power cord and other cables for connecting
system components. A minimum of four inches is required behind
the DTA-9.4 to allow room for the cables and cords without
excessively bending them.
Do not place the DTA-9.4 near TV or radio. This may cause noise or
instable video on radio or TV respectively.
Power cord
Do not use a power cord other than the one supplied with the DTA-
9.4. The power cord supplied is designed for use with the DTA-9.4
and should not be used with any other device.
Be sure to only use wall sockets that properly fit the plug of the
power cord. If the socket does not match the plug of the power cord,
you will need to prepare an adapter. Always use an adapter that is
properly certified for this application.
Speakers
Connected speakers should have an impedance of 4 ohms or greater.
If speakers with an impedance of less than 4 ohms are connected, it
may damage the DTA-9.4.
Care
From time to time you should wipe the front and rear panels and the
cabinet with a soft cloth. For heavier dirt, dampen a soft cloth in a
weak solution of mild detergent and water, wring it out dry, and wipe
off the dirt. Following this, dry immediately with a clean cloth. Do
not use rough material, thinners, alcohol or other Chemical solvents
or cloths since these could damage the finish or remove the panel
lettering.
Whenever performing maintenance on the DTA-9.4, any of its
supplied accessories, or any device connected to it, do not use
solvents or cleaners of any kind that are inflammable or combustible.
When you clean the input/output terminals on the rear panel, do not
use contact restorer. Doing so may cause resin deterioration.
Other
Below is a list of actions that you should never perform.
• Do not use the DTA-9.4 as a broadcast system or musical
instrument amplifier.
• Never use a generator, DC/AC converter, AC/AC converter, or
transformer to supply power for the DTA-9.4.
• Never perform a “thumb test” (checking whether current is
reaching the lead wire on the hot end of the input by touching it
with your fingers) on the ends of the input jacks or input cables.
Doing so may damage the speakers.
• Do not short across the output terminals or across the output
terminals and rear panel.
• Never remove the cover of the DTA-9.4.
• Do not install the DTA-9.4 in a location within the reach of
small children.
Lightning storms
During lightning storm, never touch the power cord, plug or cover of
the DTA-9.4, and any devices connected to the DTA-9.4.
Power
WARNING:
BEFORE PLUGGING IN THE UNIT FOR THE FIRST TIME,
READ THE FOLLOWING SECTION CAREFULLY.
The voltage of the available power supply differs according to
country or region. Be sure that the power supply voltage of the area
where this unit will be used meets the required voltage (e.g., AC
120V, 60Hz).