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Wiring two single 4 ohm subs
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This subwoofer wiring application includes diagrams for Single Voice Coil (SVC) and Dual Voice Coil (DVC) speakers.

Wiring two single 4 ohm subs-34

Resistance is a Static measurement (it does not change).

Speakers do not have a resistance, as whilst the cone moves the effect of the magnets in the motor causes the resistance to change.

This dynamically changing resistance is called Impedence.

It is still measured in OHMS, and is the Resistance of the Speakers Coil at rest (not connected). OK so now you understand what OHMS are and how they related to the speakers impedence, how does that help ?

But what does it all mean, and why is it all so important ? Resistance is the measurement of an electrical device or circuits ability to flow electricity.

Low resistance means the device is able to "pass" more electricity, high resistance means it "passes" less.

So 4ohm bridged gives 2 channels of power, and half the impedence on both, so you can easily gain 4x the power for "free" just by bridging your 4ohm speakers !

Series Wiring: When speakers, or Duel Voice Coil subwoofers, are wired in Series, it means one ve & -ve are connected to each other, and the remaining 2 are connected to the amplifier.

With multi-driver sub systems, the level of wiring complexity can be enough to turn-off even the most adventurous of car audio do-it-yourselfers.

Fear not, though, for we have compiled wiring diagrams of several configurations for single voice coil (SVC) drivers.

All woofer (-) to the amp (-) connections.2 Ohm Subwoofers: 0.4 Ohms3 Ohm Subwoofers: 0.6 Ohm4 Ohm Subwoofers: 0.8 Ohm8 Ohm Subwoofers: 1.6 Ohms12 Ohm Subwoofers: 2.4 Ohms All woofer ( ) to the amp ( ).