. . I go down to Speaker City and get new 15 inch woofers. My midrange and tweeters have never failed. I'm still using the Klipsch designed slot loaded corner horns I built about 40 years ago - and I haven't heard anything that sounds better. They are so efficient they are perfectly happy with cheap woofers - max cone travel of a couple hundredths of an inch when someone pounds the base drum.

Disadvantages: you have to have corners - and they're moderately large. I don't mind that, they make a fine place to put my witch doctor accessories and supplies, incense burners, drums and what have you.