Mesa/Boogie Mark Five Owner's Manual download pdf (Page 43)

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 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 Series wired speakers connected in Parallel. 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. Next, connect the Negative side of Speaker C

to the Positive side of Speaker D.

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.

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Mesa/Boogie Mark Five Owner's Manual Page 43