Speaker Draft: Box Design
Enclosure, Port & Horn Tools
Only for iPhone
$9.99 · Designed for iPhone. Not verified for macOS.
iPhone
Keep every key number for your DIY speaker build in one project. Calculate enclosure
volume, bass reflex ports, equivalent port sizes, and horn dimensions.
Speaker Draft brings the calculations and notes needed for early-stage DIY speaker design
into one focused workspace.
Enter the enclosure’s external dimensions and panel thickness to calculate its internal
dimensions, gross volume, and net volume. Account for displacement from the driver,
bracing, port, and other components to estimate the effective air volume of the finished
enclosure.
For bass reflex designs, choose from round, rectangular, or slot ports. Lock the port size,
duct length, or tuning frequency, then recalculate the remaining values as you make
changes. Review the total port area, port displacement, equivalent round diameter, and
equivalent dimensions for other port shapes.
The horn calculator supports conical, exponential, and hyperbolic-exponential profiles.
Enter the throat area, mouth area, horn length, and number of segments to calculate the
cross-sectional dimensions along the horn. Choose square, ratio-based rectangular, or round
sections, then review the profile and dimension table.
• Calculate internal dimensions from external dimensions and panel thickness
• Review gross and net enclosure volume
• Account for driver, bracing, port, and other displacement
• Design round, rectangular, and slot bass reflex ports
• Lock port size, duct length, or tuning frequency
• Convert port area into equivalent dimensions for other shapes
• Record driver details and T/S parameters
• Load built-in driver presets
• Generate horn profiles and cross-section tables
• See warnings for invalid dimensions, port fit, and excessive port volume
• Create, duplicate, switch, and automatically save projects
• Share key inputs, results, horn tables, and notes as text
• Switch between English and Japanese
Speaker Draft is designed for initial dimensioning and workshop planning. It is not a
replacement for advanced acoustic simulation. Actual tuning and response may vary depending
on driver tolerances, port placement, damping material, enclosure geometry, and measurement
conditions. Confirm the final design through prototyping and measurement.
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The developer, saito daiki, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- saito daiki
- Size
- 1.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 saito daiki
