Wayne Parham Messages: 18756 Registered: January 2001
Illuminati (33rd Degree)
One option you have is to use Omega or Kilomax 18's, JBL 2241's or other 18's that work well in cabinets that size. Delta 15's have rising response like most other high efficiency speakers and the large box is needed for bass response. But they are still most efficient in the vocal range. Larger 18's will go deeper and not as high, and so will need a lower crossover point.