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Some musing about the future of the service(Too much text but should read if you like the service): I've been developing the service for about 3 years, I've done many features: we have 3 clients(iOS, Android, WEB) and backend to connect it all. The project

Worst box app I've had to pay for, 

I’m looking at a wall build. For 2 nsv4 18” dual 1 subs. Max dimensions are H-43. D-19. L-57. Would like aero port design for a box.  Please help the tuning of it for ports and length. 28-40 hz is my range. 

It is maybe a dumb question, but I'm asking this, because I heared about those port styles which are aviable in SBL designer - called exactly the same like in SBL designer, or also some people calling round port as "tube" port, or something like this, but

Why is the port speed different between simple and complex computation models with the same project? Under simple it calculates over 50 m/s at 17 hz (box tuned to 20hz using 200w rms) but under complex it calculates only 15 m/s. Curious of the explanation

Background: Building my own 3way speaker cabinet, trying to do as small possible with response aas effective as possible with my speakers I have. I tried to use this app to define correct Volume parameters , define frequencies for Bass reflexes, and I am t

I want to build a tapped horn, folded horn, Turbo Box

Where do you specify height, width, length?  I just want a simple box!!

I've been building speakers for many years. I like the fact that this is a web based solution with quite an extensive database but I am finding a discrepancy between my other tools and this tool when it comes to using multiple drivers. When I go from one d

Needing a design for under seat in 1999 Ford F-150 extended cab it’s goin to house 4 6.5 skar evl d4 

So I have a 2001 Jeep Wrangler hardtop convertible that I’m trying to build a box for that would sound good with the top off. My customer wants to go ported but as soon as we remove the top the bass is gone. Is there a certain way I should be facing both t

Can’t get the volume & tuning calculator on any of the DC audio database speakers to work, just goes blank when I enter volume & fb. 

I want the ability to choose my own port design for subwoofer box any shape

I want to be able to choose where to place the division for the sealed side section of a 4th order box.

Why does the graph change like this between simple and complex computation model i tried the same calculation in winisd and it seems to be closer to the simple version.  Red=complex Green=simple