Driving Two Speaker Cabinets - Rivera Knucklehead Reverb KR 55T Owner's Manual

Note: Regardless of the type or number of speaker cabinets you use,
always make sure that the Impedance Selector is set to match the
speaker cabinet's total impedance load.

Driving two speaker cabinets

IMPEDANCE
SELECTOR
SPEAKER 2
TOTAL
MIN. Z 4 Ω
In this configuration, the Knucklehead Reverb is driving two speaker cabinets with
identical impedances. Using heavy-gauge speaker cords, connect the output jacks
labeled Speaker 1 and Speaker 2 to the speaker inputs on extension cabinets with a
minimum 8-ohm impedance and power-handling capacity of 100 watts. You can also
hook up two 16-ohm cabinets, but avoid if possible the use of two 4-ohm cabinets,
because the overall impedance load will be below what is optimum for the amplifier and
sustained use could result in overheating damage. When using two 8-ohm cabinets, set
the Knucklehead Reverb's Impedance Selector to 4 ohms (the diagram above shows
this setting). When using two 16-ohm cabinets, set it to 8 ohms.
100W. RMS
SPEAKER JACKS
IN PARALLEL
SPEAKER 1
USE FIRST
Knucklehead Reverb 1.0 p 26
8 Ω 8 Ω