SpeakerDraft makes it extremely easy and fun to optimize the bass response of your next loudspeaker design.

- Visually optimize the low frequency response of sealed or ported box designs.
- View frequency response changes due to parameter adjustments in real time.
- Visually identify the first box resonance frequency.
- Quickly browse through loudspeaker designs and/or drivers to select a winning combination.
- Add your own drivers to the built-in driver database or customize existing driver parameters.
- Recommended box volume and recommended port length (for ported boxes) make it easy to create a quality subwoofer design.

What's New

Version 2.0

- SpeakerDraft has been updated to properly support iPhone 6 Plus, as well as iOS 7 and 8.
- Recommended box volume and recommended port length (for ported boxes) are now displayed inline with subwoofer box design parameters. This makes it much easier to create a quality subwoofer design.
- For sealed enclosures, the system resonance and total system Q values are displayed in the frequency response graph.
- A bug has been fixed that caused the low frequency rolloff to be overestimated.
- SpeakerDraft code has been modernized to make it more robust.

Ratings and Reviews

Speaker Draft


I like this program. I have tried a few others but this one seems to work best. There are Cheever ones out there but this I find speaker draft gives me accurate results and that makes it worth the money. It agrees with manufactures recommendation for speaker volume and port dimensions when using Theil parameters. So easy to use. The on-the-fly bode chart is a cool thing also. I recommend this program.

Thought it would be better


I was hoping that there had been improvements since the last reviews. Other than English measurements this is a very basic app. Much better out there for free or much less.

Over Priced


Does very little for 20 dollars. The touch interface limits your fingers to controlling a slider that is built on an axis with discrete points, not continuos points. As well as the slider not allowing much precision, the text box for entering values rounds your measurement to the tenths place. Lame. If I pay 20 dollars for an app, I'm expecting customization and control that it takes to design a perfect enclosure. Don't buy this app, just do a little research on the internet and I'm sure you'll find a little widget or applet that provides the information this app can provide. The speaker I wanted to design for recommended an internal volume of 8.5 liters. Using this app, I was only able to achieve dimensions for an enclosure of 8.4L, and 8.6L.

This app should cost 2 dollars, not 20.


Faber Acoustical, LLC
15.4 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2015 Faber Acoustical, LLC


  • Family Sharing

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

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