If anyone (like me) was ever curious about how a speaker translates into a pure electronic model, Scan Speak has the answer for you. In their new data sheets they provide a block diagram of an electric model of a speaker and what each parameter relates to in terms of electronics. I thought it was pretty cool since it was the first time that I've seen it explained that way. And they also list some "advanced parameters" for their speakers...

And the FR graphs are probably a bit more realistic and unsmoothed...think anti-Tang Band.