Crown DC-300A Instruction Manual page 26

Many of the parts are standard items stocked by most
supply houses. However, there are several which appear
to be standard parts but are actually different. Although
standard parts may be used in an emergency, best re-
sults will be with factory parts. A number of the parts
are available only from CROWN.
When ordering parts, be sure to give the amplifier serial
number as well as the part number and description.
Rated firms will be billed, otherwise shipments will
25
be C.0.D.
Before returning an amplifier to the factory for service,
authorization should first be obtained from the service
manager. All shipments must be sent by Railway Express
or truck freight, prepaid and insured at total value. The
factory will return your serviced unit by Railway Ex-
press or truck freight, collect, and will add C.O.D.
charges in the event that the cost is not covered by
registered warranty.