edd9000
Don't Panic!
This is a neat site, it is in russian but the link should translate via google:
http://translate.googleusercontent.com/translate_c?hl=en&ie=UTF-8&sl=ru&tl=en&u=http://www.real-audio.ru/measurements/msm/msm.html&rurl=translate.google.com&usg=ALkJrhjFb2eayLmXvr-SocQcIDEKEWCKKg
The speakers in red have very detailed measurements including spectral decay, other are archives of measurements taken by the manufacturer and links to other sites.
Some measure impressively bad.

http://translate.googleusercontent.com/translate_c?hl=en&ie=UTF-8&sl=ru&tl=en&u=http://www.real-audio.ru/measurements/msm/msm.html&rurl=translate.google.com&usg=ALkJrhjFb2eayLmXvr-SocQcIDEKEWCKKg
The speakers in red have very detailed measurements including spectral decay, other are archives of measurements taken by the manufacturer and links to other sites.
Some measure impressively bad.

