The maximum measured output impedance was 0.16 ohms, at 20kHz into a 4 ohm load, this decreasing to less than 0.1 ohm at 1kHz. This is not unusually low for a solid-state amplifier, but low enough that any effect on the amplifier's frequency response with a real load will be small.
The History of American Girl Dolls and Pleasant Company and changes in Book Illustrations. Pleasant Company began in 1986 in Middleton, Wisconsin. The company was founded by Pleasant T. Rowland, a woman who used to be a teacher and a publisher of educational texts. Rowland sold Pleasant Company in 1998 to Mattel. Pleasant Company is now legally called American Girl. The first catalogue contained only 3 historical dolls, whereas now there are 10 (not counting the new addition of the best friends dolls).
ADDISON PRODUCTS: Started in 1949, purchased by Heat Controller in 1995, purchased by Fedders in 2004. Upon Fedders' bankrupcy, purchased by Roberts-Gordon in 2008. AIRE-FLO:: Old Lennox tradename revived for use on economy line sold by Lennox dealers. AIRQUEST: Name used by International Comfort Products.