and see what kind of Vb is required. From there, the design process is pretty straight forward. The regular Kappa12 looks similar to the Delta12LF that Wayne uses in the Theater 3 with the eminence PSD-2002 crossed PASSIVE at 1.6kHz. His HF design is "turnkey" complete normally, but if your woofer is higher than the 97 dB sense of the Delta12LF, a different amount of HF padding will be needed. Sam