Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
Theater Series four π's are really great speakers. When you have 'em done, they don't really seem "too big" and they are well worth the size. Sealed alignments for the Delta 15 are underdamped if less than eight cubic feet. Six cubic feet is acceptable, but a ported alignment is better in all respects so it just doesn't make sense to run this speaker in a sealed cabinet. Run some response curves with Boxplot and you'll see what I mean.