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Amplifier Precautions
Before using the DTA-70.1 power amplifier, be sure to
read the page above entitled Important Safety Instruc-
tions and this page of Amplifier Precautions.
While using the DTA-70.1, the internal temperature will
fairly rise. Excessive temperature rise may affect the
amplifier performance. To prevent damage from occur-
ring 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-70.1 inside cabinets or closets
where there is poor passage of air and ventilation.
• Do not place the DTA-70.1 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-70.1.
• The cover of the DTA-70.1 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.
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-70.1 to allow room for the power cord and other
cables for connecting system components. A minimum
of four inches is required behind the DTA-70.1 to allow
room for the cables and cords without excessively bend-
ing them.
Do not place the DTA-70.1 near TV or radio. This may
cause noise or instable video on radio or TV respectively.
Do not use a power cord other than the one supplied with
the DTA-70.1. The power cord supplied is designed for
use with the DTA-70.1 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.
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-70.1.
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. Follow-
ing this, dry immediately with a clean cloth. Do not use
rough material, thinners, alcohol or other Chemical sol-
vents or cloths since these could damage the finish or
remove the panel lettering.
Whenever performing maintenance on the DTA-70.1,
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.
Below is a list of actions that you should never perform.
• Do not use the DTA-70.1 as a broadcast system or
musical instrument amplifier.
• Never use a generator, DC/AC converter, AC/AC con-
verter, or transformer to supply power for the
DTA-70.1.
• Never perform a “thumb test” (checking whether cur-
rent 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-70.1.
• Do not install the DTA-70.1 in a location within the
reach of small children.
During lightning storm, never touch the power cord, plug
or cover of the DTA-70.1, and any devices connected to
the DTA-70.1.
WARNING:
BEFORE PLUGGING IN THE UNIT FOR THE FIRST
TIME, READ THE FOLLOWING SECTION CARE-
FULLY.
AC outlet voltages vary from country to country. Make
sure that the voltage in your area meets the voltage
requirements printed on the unit’s rear panel (e.g., AC
220-240 V, 50/60 Hz or AC 120 V, 60 Hz).
Ventilation
Installation location and space
Power cord
Speakers
Care
Other
Lightning storms
Power
DTA-70.1_En_100108.book Page 6 Friday, January 8, 2010 2:04 PM