Mesa/Boogie California Tweed 6V6 2:TWENTY Owner's Manual page 27

SERIES
When you wire ( hook-up ) speakers in Series, the speakers resistance ( as measured in ohms ) is additive - i.e.
putting two 8 ohm speakers in Series results in a 16 ohm load.
NEGATIVE =
POSITIVE =
Speaker A = 8 Ohms Speaker B = 8 Ohms
SERIES:
Connect the Negative side of Speaker A
to the Positive side of Speaker B
PARALLEL
When wiring in parallel, the resistance of the speakers decreases. Two 8 ohm speakers wired in ( hooked-up
) Parallel results in a 4 ohm load. It's easy to calculate the effect of a resistive load when all the speakers are
all the same resistance. It is really not suggested to wire different resistive load values in Parallel ( 8 and 4, 16
and 8 etc. ) The formula for figuring the total impedance in Parallel is the multiplication of the two loads divided
by the sum of the two loads - i.e. putting two 8 ohm speakers in Parallel results in a 4 ohm load. Connect the
Positive side of Speaker A to the Positive side of Speaker B - Connect the Negative side of Speaker A to the
Negative side of Speaker B.
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