SoundQubed

Ohm Load Calculator

Select the subwoofer coil setup and wiring pattern to estimate the final load your amplifier will see.

Use the impedance printed on each voice coil, not the final load from a previous wiring setup.
Changing the wiring pattern changes whether resistance adds together or divides down.
Final Amplifier Load
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Choose a setup above.
Verify amplifier minimum impedance before powering the system.
Wiring Path
Wire all coils in parallel.
1. Coil Setup Every coil shares the same positive and negative connection.
2. Sub Setup All subwoofers are tied together in parallel.
3. Amp Load The amp sees the divided total impedance.
Common Loads For This Setup
Pattern Final Load

These calculations assume identical subwoofers and identical voice coils. Mixed impedance systems need a custom wiring plan.