Subwoofer school’s in session! You’ve now enrolled into KICKER U, where you have instant access to a toolbox of mobile-audio installation knowledge. Let KICKER U help you design and build custom enclosures and assist with wiring subwoofers.

This version contains calculators for converting your port from round to slot or vice versa, calculate the tuning frequency of your existing enclosure as well as the ability to enter and save Thiele-Small parameters to create boxes for any driver you own along with many other features.

What’s New

Version 3.1.9

- Fixed crash when using ported enclosure with multiple drivers.
- Fixed port calculation when using multiple drivers.

Ratings and Reviews

2.7 out of 5
27 Ratings

27 Ratings

05psd ,

Color scheme is horrible

Love the app, has a lot of good info of you deal with a lot of kicker stuff (or things with similar specs) but the colors of text and backgrounds are terrible. Very difficult to read and no way to change them. Come on, yellow background with white text??

kurtiswhoa ,


This sub that I just purchased isn’t even on the app for setting up! Wasted my money after I just bought the sub. Maybe needs updating?!

Not a proffesional ,

Has it’s perks and downfalls (more than there should be)

Installed this app while looking for another. Has been installed 20 minutes. These are my thoughts

1: no “back” or “cancel” button after making any selection from the home screen

2: frequency generator works fine for single tones. Sine wave does not alternate.

3: saved boxes crashes the app

4: have to exit the app and close it to return to the home screen.

This app will stay installed for a decent tone generator and possibly a reminder for wiring drivers. Would not recommend. Will probably stick to the tone files I made myself.

App Privacy

The developer, Stillwater Designs, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


Stillwater Designs
91.9 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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