PF-20T / PF-50T Bass Guitar Amplifier
NOTE: This equipment has been tested
and found to comply with the limits for a
Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed
to provide reasonable protection against
harmful interference in a residential
installation. This equipment generates,
uses, and can radiate radio frequency
energy and, if not installed and used in
accordance with the instructions, may
cause harmful interference to radio
communications. However, there is no
guarantee that interference will not occur
in a particular installation. If this equipment
does cause harmful interference to radio or
television reception, which can be determined
by turning the equipment off and on,
the user is encouraged to try to correct
the interference by one or more of the
following measures:
• Reorient or relocate the receiving
• Increase the separation between
the equipment and the receiver.
• Connect the equipment into an outlet
on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced
radio/TV technician for help.
CAUTION: Changes or modifications to this
device not expressly approved by Yamaha
Guitar Group Inc. could void the user’s
authority to operate the equipment under
FCC rules.
This apparatus does not exceed the
Class A/Class B (whichever is applicable)
limits for radio noise emissions from digital
apparatus as
set out in the radio interference
regulations of the Canadian Department
Exposure to extremely high noise levels may
cause permanent hearing loss. Individuals
vary considerably in susceptibility to
noise-induced hearing loss, but nearly
everyone will lose some hearing if exposed
to sufficiently intense noise for a period of
time. The U.S. Government’s Occupational
Safety and Health Administration (OSHA)
has specified the permissible noise level
exposures shown in the following chart.
According to OSHA, any exposure in excess
of these permissible limits could result
in some hearing loss. To ensure against
potentially dangerous exposure to high
sound pressure levels, it is recommended
that all persons exposed to equipment
capable of producing high sound pressure
levels use hearing protectors while the
equipment is in operation. Ear plugs or
protectors in the ear canals or over the
ears must be worn when operating the
equipment in order to prevent permanent
hearing loss if exposure is in excess of
the limits set forth here:
Duration, per
day in hours
Level dBA, Slow
Typical Example
8 90 Duo in small club
6 92
4 95 Subway Train
3 97
2 100 Very loud classical music
1.5 102
1 105 The boss screaming at his minions about manual deadlines
0.5 110
0.25 or less 115 Loudest parts at a rock concert
Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household waste,
according to the WEEE directive (2012/19/EU) and your national law. This product should be handed over to an authorized
collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of waste could have
a possible negative impact on the environment and human health due to potentially hazardous substances that are generally
associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the effective
usage of natural resources. For more information about where you can drop off your waste equipment for recycling, please contact
your local city office, waste authority, or your household waste disposal service.
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