Well my bass cab is a 4 ohm Peavey 115 EX rated at 250 watts. There is no horn in this cabinet. The problem is that my Tour 700 head pushes 700 watts into 4 ohm and 500 watts into 8 ohm. So instead of waiting for the speaker to fry some night I am thinking of putting in the Kappalite 3015 which is rated at 500 watts 8 ohm. Do you guys think that the 3015 will work and sound good in this cabinet. The outside dimensions are 26.625" H x 24.5" W x 19.75" D so I would need to subtract some to get to the internal dimensions. There is a 5.5" across port on the front. I am hoping not to have to do any modifications. Current Black Widows do not go high enough in freq. so that leaves Peavey out as a option. I play a 4-string so do not need mega-low output for a B string. Let me know what you think? Thanks, Wayne