[Mike P.]

Something is not right with your file. Here is the file with parameters supplied by the Orion website. The "auto calculate unknowns" feature was used to create the file.

View attachment Orion CO154S.wdr

 

[Mike P.]

A slightly easier way is save the file to the "Drivers" folder in WinISD.

 

[Mike P.]

Glad you got it working. You can now see why 140 liters for 4 subs won't work.

 

[Mike P.]

Do you mean one sub in 220 liters tuned to 24 hz?