2x swr12d4 box tuning/help

[Nismomaniak]

That is set to 2000w .

[Joe X]

You probably defined a single driver instead of two, of course a 6" port for a single driver should be enough.

[Nismomaniak]

Nope, two drivers!

[Nismomaniak]

Could you perhaps post a screenshot so I could see whats different? Im not doubting your knowledge, and I understand that winisd isn't the be all end all.

[Triticum Agricolam]

Here is what I get with two SWR-12D2, in 4 cubes @ 40 Hz, on 2000 watts:

That's with a single 6" port, your port velocity is WAY too high.

Also, you might want to download the newest version of WinISD, you can get it here: http://www.linearteam.org/download/winisd-07x.exe

[Joe X]

Could you perhaps post a screenshot so I could see whats different? Im not doubting your knowledge, and I understand that winisd isn't the be all end all.

You may have to check your data, I get something similar to what's shown above.

[Nismomaniak]

I see what ive done now, front port doesn't mean port facing forward. My bad!

So slot porting it is, 60sqin. And measurements are taken from the centre of the width of the port?

How do I go about making velocity lower? assuming my height will be 16", making port height 14.5", 4" wide would give me a hair under 60" of port, that leaves me with 52m/s velocity.

[Nismomaniak]

Any tips on reducing velocity?

[Triticum Agricolam]

Any tips on reducing velocity?

Run less power (which is probably not how you want to do it) or increase port area, those are your two options.