Input Power Control

How input power, series resistance, crest factor, and headroom-limited power policies affect results.

Direct answer

Input power sets the electrical drive level used for SPL and limit calculations unless a headroom-limited policy chooses the operating power.

What it measures

• Configured input power in watts for fixed-power simulations.
• Series resistance and driver wiring assumptions where applicable.
• Headroom-limited operating power, threshold power, and max safe power in internal API flows.

Why it matters

• SPL, excursion, port velocity, and thermal demand all depend on drive level.
• A one-watt comparison answers a different question than a target-output comparison.
• Series resistance and wiring can change voltage, current, and effective output.

How to read it in 00 Simulator

• Use one-watt views for sensitivity and shape comparisons.
• Use realistic fixed power or headroom-limited power for practical output checks.
• After changing power, revisit excursion, port velocity, thermal power, and Max SPL.

What good, warning, and bad usually look like

Good

The chosen power basis matches the design question being answered.

Warning

The response is compared at one power level while limits are judged at another.

Bad

A design is accepted based on a power level the driver, amplifier, or port cannot support.

Common false conclusions

• Doubling power does not double SPL; it changes SPL by about 3 dB before limits intervene.
• Fixed input power does not guarantee clean output.
• Headroom-limited power depends on the configured limits and crest factor.

App behavior notes

• The internal API supports fixed and headroom-limited power modes.
• Headroom power policies evaluate thermal, driver, passive radiator, and port limits over a configured frequency range.