I forgot to mention that I am driving these speakers with great effect by my old Technics integrated amp I bought around 1987. With all the mention around here of the 4 ohm problem, I wasn't sure if something this humble would be adequate, but they really hump (oops, is "hump" an acceptable audiophile word?).
This older amp is 100 watts per channel and it has a switch in the back for 8 or 4 ohms, which I presume must be a current limiting device. In any event, it does hump. After enjoying the detail and crispness of the high end and midrange, I put in one of my kids rap discs. I swear them little 6" woofers about spit out on the floor. They must be traveling an inch back and forth. not much finesse to those recordings, but they serve to give the amp and speakers a workout!
Question: what is the standard SPL rating on these speakers? they list two different specs for them. I can tell you this much, with my volume on two, they are very loud.

Dan