Welcome to our free impedance calculator tool. Whether you’re wiring single or dual voice-coil subs, multiple speakers in series or parallel, or building a car audio setup — this calculator will help you determine the correct total load (ohms) your amplifier will see.
Impedance (measured in ohms, Ω) is the electrical load an amplifier “sees” when connected to speakers or subwoofers. Matching wiring configurations correctly is crucial because:
For example, many car amplifiers are rated at 4 Ω and produce more power when wired to 2 Ω. Using an improper wiring configuration may reduce performance or increase risk of equipment failure.
Enter your setup and we’ll compute every achievable final load from common series/parallel topologies (including equal-size groupings). Use identical drivers only.
Q: What is the minimum load my amplifier should see?
A: Check your amplifier’s specifications — if it says “2 Ω stable” it means you should not go below 2 Ω total load. Going below can risk overheating or damage.
Q: What happens if I wire incorrectly?
A: If the impedance is too low, your amplifier may shut down, go into protection, or be damaged. If too high, you’ll get less power and performance.
Q: Does this tool work for both car and home audio?
A: Yes — although home audio amplifiers often expect 4 Ω or 8 Ω loads. Car audio often deals with 4 Ω, 2 Ω, or 1 Ω loads. Always match your amplifier’s specifications.
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