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SPEAKER IMPEDANCE MATCHING & HOOK-UP GUIDE: (Continued)
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 multiplica-
tion 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.
COMBINATION OF SERIES & PARALLEL:
This is really just two sets of Parallel wired speakers connected in series. This is how you maintain a consistent load with multiple
speakers. The importance of this is more evident when you have more than one cabinet to connect to your amplifier. This is when you need
to figure out the loads and how to wire them up without applying too low of a resistance on the amplifier.
Simply connect the Positive side of Speaker A to the Positive
side of Speaker C.
Connect the Negative side of Speaker A to the Positive side of
Speaker B, then on to the Positive side of Speaker D and finally
on to the Negative side of Speaker C.
And lastly, connect the Negative side of Speaker B to the Nega-
tive side of Speaker D.
4 Eight ( 8 ) Ohm speakers wired in Series Parallel = a Total
Load of 8 Ohms.
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Electro-Voice
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SPEAKER A
SPEAKER B
SPEAKER C
SPEAKER D
NEGATIVE
All 4 Spkrs.are 8 Ohms
POSITIVE
POSITIVE
Speaker A
8 Ohms
Speaker B
8 Ohms
NEGATIVE
Total Load = 4 Ohms
Made by
Electro-Voice
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Made by
Electro-Voice
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