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PAGE 14
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 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 O hm 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 Posi-
tive 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
Negative side of Speaker D.
4 Eight (8) Ohm speakers wired in Series Parallel + a Total
Load of 8 Ohms.
POSITIVE
Speaker A
8 Ohms
Speaker B
8 Ohms
NEGATIVE
Total Load = 4 Ohms
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
Made by
Electro-Voice
B
L
A
C
K
S
H
A
D
O
W
SPEAKER A
SPEAKER B
SPEAKER C
SPEAKER D
NEGATIVE
All 4 Spkrs.are 8 Ohms
POSITIVE