R Series V1.0 p 11
Note:
Repeated blowing of this fuse is a clear indicator of a defective
output tube(s). Always use the correct fuse value when replacing the
HT Fuse.
If the Mains Fuse or the HT Fuse repeatedly blows, refer your amp to your local
RIVERA dealer or contact us at (818) 833-7066 for further service assistance.
Speaker output -
R30-112 and Chubster 40
A speaker must always be connected to your Thirty Twelve or Chubster 40, whether it's
the internal 12" speaker or an extension speaker cabinet. The amp is designed to
deliver at least 30 watts to an 8-ohm speaker load. If it has to drive speaker loads lower
than 4 ohms, its output transformer or other components could be damaged. You can
use an 8- or 16-ohm extension cabinet, with the internal speaker unplugged). Never use
a 2-ohm speaker cabinet. The only time you may run the amp without a speaker
connected is if you have a proper "dummy" impedance load box plugged into the
speaker output. Using a dummy load protects the output transformer, but prolonged use
shortens the life of the amp's output tubes. If you use your amp to drive an extension
cabinet, use a heavy-gauge speaker cord. A shielded guitar cord can't handle the power
that your amp provides, and therefore won't sound right--plus it may actually harm your
amp. Refer to the connection diagrams for more information. If you need to run an
external speaker (8 or 16 ohms) along with the internal speaker, you may use a high
quality Y Cord adaptor.
Speaker output -
Chubster 55, Suprema, R55-112
A speaker must always be connected to your Fifty Five Twelve, whether it's the internal
12" speaker or an extension speaker cabinet. The amp is designed to deliver at least 55
watts to an 8-ohm speaker load. If it has to drive speaker loads lower than 4 ohms, its
output transformer or other components could be damaged. You can use an 8- or 16-
ohm extension cabinet, or two 8- or 16-ohm cabinets (one into each speaker output,
with the internal speaker unplugged). You can also use one 4-ohm cabinet if the internal
speaker is disconnected. Never use a 2-ohm speaker cabinet or two 4-ohm extension
speaker cabinets. The only time you may run the amp without a speaker connected is if
you have a proper "dummy" impedance load box plugged into the speaker output. Using
a dummy load protects the output transformer, but prolonged use shortens the life of the
amp's output tubes. If you use your Fifty Five Twelve to drive an extension cabinet, use
a heavy-gauge speaker cord. A shielded guitar cord can't handle the power that your
amp provides, and therefore won't sound right--plus it may actually harm your amp.
Refer to the connection diagrams for more information.
Speaker output -
R100-212
A speaker must always be connected to your Hundred Duo Twelve, whether it's the
internal 12" speakers or an extension speaker cabinet. The amp is designed to deliver
at least 100 watts to a 4-ohm speaker load. If it has to drive speaker loads lower than 2
ohms, its output transformer or other components could be damaged. You can use an
8- or 16-ohm extension cabinet, or two 8- or 16-ohm cabinets (one into each speaker
output, with the internal speaker unplugged). While it is not optimum, a 2-ohm speaker
