Well, in case anybody is following this thread, I did mount them up today to compare. I had an old pair of taller Sony bookshelf speakers lying around that had been rebuilt about 15 years ago. The speakers consist of a 1" tweeter and a 6.5" midrange; there is also a 6.5" passive radiator. The woofers were replaced 15 years ago with Radio shack woofers--the tweeters are original. To compare, I swapped out the woofer in one speaker with an Alpine Type S 6.5" coaxial speaker and compared to the other. While neither speaker had an amazing amount of bass, the Alpine unit was much, much clearer and full sounding. I will be swapping the other and using these as outdoor garage speakers, probably with a subwoofer tucked away somewhere.