issue WinISD port length Qes/Pe!

[Amit_112dB]

hi
i am having a problem with my winISD i was trying some Sony DVC from this site
http://www.xplodsony.com/technology/view/2006+Subwoofer+Parameters

it is giving me the port length as Qes/Pe! red colour

any idea what this is 😕

 

[BHTX]

Usually, it means that the port velocity is too high, and the diameter of the vent needs to be increased substantially. A rule of thumb is to keep the vent mach under 0.16 or so, although I'd say this is dependent on a number of variables, including the application for the driver being used..

However, I've also seen WinISD Beta (what you're obviously using) go completely whacko with the vent lengths while the Qes/Pe! msg won't go away. If this happens, simply close WinISD, reopen, and start over. In fact, this happened to me again just yesterday. On another topic, WinISD isn't the most accurate of all things, and the Beta version certainly isn't. I've also heard things about vent lengths displayed being incorrect.

~ Brandin

 

[Foxx510]

It usually means that the power spec (PE) or another parameter has not been entered for the driver. Just check the T/S specs and see what is missing.

 

[BHTX]

Yeah, that'd definitely cause the error as well..

"Max RMS Power(W)"

..Enter the RMS power rating for Pe, listed in the specs for which ever woofer you're looking at.

 

[Amit_112dB]

THANKS to you all

Yeah, that'd definitely cause the error as well..
"Max RMS Power(W)"

I thought Pe was not important, i missed Pe rms value in details

thanks to you all