Radiation Space Control

How radiation space settings change SPL assumptions for full, half, quarter, and eighth-space loading.

Direct answer

Radiation space tells the simulator what acoustic boundary condition to assume when converting driver motion into SPL.

What it measures

• The boundary-loading assumption used by SPL-related calculations.
• How much space the speaker is radiating into relative to free-space behavior.
• A project/environment setting that affects simulated output rather than enclosure geometry.

Why it matters

• Boundary loading can change predicted SPL without changing the box.
• Comparisons are misleading when designs use different radiation-space assumptions.
• It keeps simulator output closer to the intended placement context.

How to read it in 00 Simulator

• Choose the radiation space that matches the intended measurement or deployment condition.
• Keep the setting consistent when comparing enclosures.
• Do not use radiation space to hide physical output or excursion limits.

What good, warning, and bad usually look like

Good

The selected radiation space matches the intended real-world placement or comparison basis.

Warning

A design looks better only because it is compared under a more favorable boundary condition.

Bad

The chosen setting does not match the actual use case and drives wrong power or headroom decisions.

Common false conclusions

• Radiation space is not a room model.
• Boundary gain does not remove excursion, thermal, or port limits.
• Changing the setting does not replace measured placement and room validation.

App behavior notes

• The internal API exposes radiation space through the simulation environment.
• Listening distance is a separate environment/headroom assumption.