OK I didnt have any Omega 15s around so I tried the ps2002 8 ohm and a 15 kp15lfa. The sound was excellent ,I first tunned it to 35-38 hz. Unbelievable midrange and no bass hangover on the voice. I breadboarded the crossover and wound the coils by hand. It dont look good but good enough for testing. I used a 15 ohm and 25 ohm for the atten. I had a 2.9 cu. ft. box. OK the treble was excellent and I have not heard any thing better coming out of a horn. The woofer and horn blended together perfect.