Mesa/Boogie LoneStar Amplifier owner manual Speaker Impedance Matching & HOOK-UP Guide

SPEAKER B

SPEAKER D

All 4 Spkrs. are 8 Ohms

COMBINATION OF SERIES & PARALLEL:

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 fi guring 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.

Speaker A

8 Ohms

		S
	K	H
	C
L	A
B

O W

BL

K C A

SH

Speaker B

8 Ohms

O

W

NEGATIVE

POSITIVE

Total Load = 4 Ohms

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 amplifi er. This is when you need to fi gure out the loads and how to wire them up without applying too low

of a resistance on the amplifi er.

SPEAKER A

		S
		H
	K	A
	C	D
L	A	W
B		O

SPEAKER C

	S
	H
K	A
	D

O

W

		S
	K	H	A
	C		D
L	A		W
B			O

		S
		H
	K	A
	C
L	A
B

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. 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.

POSITIVE NEGATIVE

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