Ohmic Audio Interactive Tools
Interactive calculators and signal tools for enclosure planning, crossover setup, and repeatable measurement checks.
Open BoxCalc — enclosure estimates with local projects and JSON backup. No sign-in or Home required.
Use these tools for a calculation or a quick check. For the full setup steps, read the guides.
Need the setup steps? Read the Design Suite docs or Measurement Suite docs.
Hit a bad result, broken link, or weird page behavior? Report a bug or page issue.
Size A Box
Start with the box calculator to work out enclosure volume.
Size A Port
Enter your box volume and tuning frequency to estimate port length.
Check Crossover Math
Check crossover component values before you start tuning.
Verify Signal Or SPL
Use the signal generator for test signals or the SPL offset calculator to adjust a reading from an external meter.
Interactive Tool Pages
Start here when you need a fast calculator or bench utility instead of a longer docs page.
Design
Fast enclosure sizing and first-pass planning.
Estimate port length from box volume and tuning frequency.
Calculate crossover component values.
Translate level references without doing it by hand.
Quick filter-Q conversion for tuning work.
Check headroom before you push levels too far.
Measurement
Add a known offset to a manually entered meter reading; no microphone capture.
Bench signal utility for tests, sweeps, and setup checks.
Read the Design and Measurement guides for setup instructions. Use these tools when you need to check a calculation or generate a test signal.