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Speaker Impedance Calculator
Series · Parallel · Mixed — Protect Your Output Transformer

Calculate total speaker load impedance for any combination of cabinets and speakers. Never mismatch your amp and risk damaging the output transformer.

Wiring Configuration
Common Configurations
Quick Load — Click to Apply
2x8Ω Parallel
= 4Ω — two 8Ω cabs together
2x16Ω Parallel
= 8Ω — standard 2-cab setup
4x8Ω Parallel
= 2Ω — four speakers parallel
4x16Ω Series-Par
= 16Ω — classic 4x12 wiring
4x8Ω Series-Par
= 8Ω — 4x12 with 8Ω speakers
2x4Ω Series
= 8Ω — two 4Ω speakers in series
Your Speakers / Cabinets
Result
Total Load Impedance
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Ohms (Ω)
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