LAB 12 Ported Help

[ExplorerEst]

Box : 7.769 cu. ft / 220l
Tuning : 20.7Hz
2 Vents |Diameter 100mm| Lenght 400mm|
Running out of xmax @ 19Hz

Is this a good box for lab 12?
Is everything right?
What to change to get better result.

Some pictures

http://www.upload.ee/image/2026404/SPL_300w.jpg
Thats SPL @ 300w

http://www.upload.ee/image/2026409/Cone_movement.jpg
Cone Displacement @ 300W

http://www.upload.ee/image/2026411/V...r_Velocity.jpg
Vent Air @ 300W

[Mike P.]

Can you provide a link to the parameters you used? My modeling gets completely different results from yours.

[ExplorerEst]

Parameters from here: http://www.eminence.com/pdf/LAB_12.pdf
And parameters i entered in bassbox pro6 http://www.upload.ee/image/2026793/Parameters.jpg

[gperkins_1973]

Ive just inputted those parameters and am getting a different result. I have attached my winisd file. On mine xmax is on it's limit with 200 watts input power based on a 220l box. I also have a tuning off 21.25hz.

I didn't get any errors in winisd so I am guessing my file is ok.

cheers

Graham

[Mike P.]

My WinISD file is the same as Grahams.

[ExplorerEst]

Bassbox pro is not right then? It's time to use winISD?

[Mike P.]

I really can't say which one is more accurate.

[gperkins_1973]

300 watts input power would take it quite a bit over xmax on my model. And the spl on mine is quite a bit less too.