Speaker impedence/amp articles
Not sure who has seen these articles and I don't have the expertise to critique them but I thought they had good info worth knowing if you are in early stage disease of the mind called audioholicism.
http://www.prestonelectronics.com/audio/Impedance.htm
http://www.prestonelectronics.com/audio/Speakers.htm
http://www.prestonelectronics.com/audio/Impedance.htm
http://www.prestonelectronics.com/audio/Speakers.htm