95BlackGA is right on I think, I have no specs on these babies but they do sound fantastic I was running them with an Orion XTR-450 in the rear deck of Mercury Grand Marquis. They wont fit in many cars because the cast aluminum frame is big and extends to the edge and they need to be top mounted since the metal grill is integrated with the speaker. They are very efficient and do not require gobs of power to get loud at all. I think the frequency response is 40Hz - 20Khz but it has been awhile don't quote me on it.
They will leave all but a couple of the 6x9's made today in the dust. The only 6x9 that came close in that era was the JBL T545, JBL reintroduced the T595 as an Anniversary model. Cerwin Vega did not follow suit, all there full range speakers are foriegn made junk these days.