For the phone may be difficult to find but WinISD is free to download & use

 

+1 on WinISD it handles everything up to 6th order bandpass. If you want to get into things like horns and TLs then Hornresp works but is not nearly as easy to use.

 

I’m looking for a fairly basic sub box program that will show the frequency response graph of the specific sub and box once the info is submitted. Way back in 96-98 when I was doing IASCA competitions and also started working at the stereo shop that had done all my big builds, they had an old Rockford box program that you could put in the relevant specs for the sub you’re using, then put in the box info, sealed, ported, several bandpass types, and it would kick out the graph so we would know if the particular setup would sound like a giant steaming pile of rhinoceros poop or it was going to be amazing. Not looking for anything more than that, but finding something that works on a phone for either free or almost free has been more challenging than I thought it would be 25 after using the old Rockford one.

suggestions?

Speaker Box Lite - Android app or website SpeakerBoxLite. Subwoofer box calculator, Sub box calculator.

 

Woofer Box Calculator app
Pay for the Pro. It's like WinISD (Lite). I've had issues with the Speaker Box Lite app 🤷‍♂️


From my home buildplan