Impedance Graph

How to read the impedance magnitude graph and use it to understand amplifier load and enclosure resonance.

Direct answer

The impedance graph shows the predicted electrical impedance magnitude of the driver/enclosure system over frequency.

What it measures

• Impedance magnitude in ohms over frequency.
• Resonance behavior introduced by the driver and enclosure alignment.
• The electrical load shape seen by the amplifier model.

Why it matters

• Low impedance regions can demand more current from an amplifier.
• Impedance peaks help confirm resonance and tuning behavior.
• It gives context for amplifier load and current draw graphs.

How to read it in 00 Simulator

• Look for the minimum impedance region, not just the nominal driver impedance.
• Use resonance peaks as sanity checks against the enclosure type and tuning.
• Compare with amplifier load when evaluating difficult electrical loads.

What good, warning, and bad usually look like

Good

The impedance curve is plausible for the driver and does not dip below the amplifier comfort zone.

Warning

The curve includes low dips or unusual peak placement that should be checked against setup assumptions.

Bad

The predicted load is lower than the intended amplifier can drive safely.

Common false conclusions

• Nominal impedance is not the same as minimum impedance.
• A high impedance peak is not necessarily a problem by itself.
• The impedance graph is magnitude-focused; phase behavior is inspected separately.

App behavior notes

• The UI graph id is `impedance`; legacy shared layouts may also contain `electrical-impedance`.
• The internal graph key is `impedance`.