Careful consideration has been given to the design of your new hybrid power amplifier
to keep maintenance problems to a minimum; however, it is possible that some
problems may arise. If this occurs, we suggest contacting our Customer Service
Department at phone number 919-355-0010 from 1 to 5 PM, East Coast time to
describe your problem in detail. Do not return the CAD-308 SA to the factory without
a Return Authorization Number (RMA number) from the Customer Service
Department. As the packing and shipping is being done by others, Cary Audio Design
will assume no responsibility if the transportation company refuses to pay a damage
claim due to your improperly packing or for lack of insurance should the unit be lost or
damaged in shipment from you to us.
Technical Support
If you ever should need it, Technical Support for Cary Audio Design components is
available from 1 to 5 PM Monday through Friday at 919-355-0010. We value your
opinions and suggestions as well! Thanks again for buying a Cary Audio Design
component for your home stereo!
Replacing the Input Driver Tubes
If you ever need to change an input driver tube (or you wish to try other brands for
sound quality reasons) unplug the amplifier before opening the cabinet. We suggest that
you change both of the 12AU7 or 5814 tubes at the same time to keep them matched
for total hours of use. Any current production or new old stock (NOS) 12AU7, 5814 or
equivalent tubes will work very well in the CAD 308 SA hybrid power amplifier.
We
choose to operate tubes in the ‘sweet spot’ of their operating characteristics
, not near their
operational limits. As a result, the input tubes should last for years in this design.
WARNING!
Please do not touch any of the internal parts other than the
vacuum tubes as there are potentially lethal high voltages stored
in the power supply section.
Cary Audio Design
1020 Goodworth Drive
Apex, North Carolina 27539
Tel: 919-355-0010
Fax: 919-355-0013
www.caryaudio.com