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listen to music, simply flip the stand-by switch to the “REAR” position. Under these
conditions the CAD-211M is always ready for peak performance.
3.4
Break In Period
The tubes, capacitors and output transformer take approximately 100 hours of music
playing time to operate at peak performance. The CAD-211M may seem sterile or thin
sounding right out of the box. After the first couple of hours, you will notice increased
depth and tighter bass. This break-in period defies all engineering theory, but is true with
most audio amplifiers.
SERVICE AND CARE
4.1 Care and Cleaning
The chassis of the CAD-211M may be cleaned with a soft towel and Windex® (or a
similar window cleaner). The frequency of cleaning will be governed by how many hours
the CAD-211M is operated and by operating environmental cleanliness.
4.2 Tube Replacement
If it becomes necessary to replace the tubes in the CAD-211M amplifier, a matched set of
tubes of the same brand should be used. Although tube life varies depending on the nature
and degree of use, under normal operating conditions for home use, the tubes in the CAD-
211M should last several years or more.
4.3 Factory Service
In the design of the CAD-211M, careful consideration was given to keep maintenance
problems to a minimum. However, it is possible that problems may arise which cannot be
cured by tube substitution. At this point, contact our Customer Service Department,
(919) 481-4494, to describe you problem in detail. Do not return the CAD-211M to the
WARNING
Make sure amplifier is
unplugged from AC mains
for any service or
cleaning!