Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
The Theater four π speaker cabinet was designed about ten years ago, and used a different version of the Delta 15. I noticed it had changed - and has since changed a couple more times - But box tuning was still appropriate for the (then and now) current Delta 15. In fact, I believe one of the older Delta 15 specs are what is in the PiAlign "DAT" file.