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Series vs. Parallel Wiring


In some cases it may be necessary to wire speakers in different configurations in order to properly match the amplifiers impedance capabilities. The following diagrams show different connections in order to get your desired impedance load.


There are basically two different ways to wire speakers, "Series", and "Parallel" Typically the series wiring configuration is used to increase the impedance and parallel is used to reduce the impedance. For the larger more advanced systems, you can use a combine both series and parallel connections to achieve your desired net impedance.


Impedance Examples for Single Voice Coil Subwoofers


Impedance Examples for Dual Voice Coil Subwoofers

The following chart will show the net impedance the amplifier will see when using multiple Speakers. Before making connections to your amplifier be sure to check the amplifiers impedance capability (lowest load allowed). Connecting low impedance loads beyond the amplifiers specified capabilities will cause the amplifier to over heat and cause permanent damage to the amplifier and speakers! To see the impedance ratings of DB Drive amplifiers Click Here.
Parallel Connections
Woofers Impedance
How many Woofers
= Net Impedance
8 Ohm
2
4 Ohm
8 Ohm
3
2.66 Ohm
8 Ohm
4
2 Ohm
8 Ohm
5
1.6 Ohm
8 Ohm
6
1.33 Ohm
8 Ohm
7
1.14 Ohm
8 Ohm
8
1 Ohm

4 Ohm
2
2 Ohm
4 Ohm
3
1.33 Ohm
4 Ohm
4
1 Ohm
Series Connections    
Woofers Impedance
How many Woofers
= Net Impedance
4 Ohm
2
8 Ohm