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).
In May 1970, Mattel formed a joint venture film production company, Radnitz/Mattel Productions, with producer Robert B. Radnitz. The Ringling Bros. and Barnum & Bailey Circus was purchased by the Mattel company in 1971 for $40 million from the Feld family, who was retained as management. Mattel had placed the circus corporation up for sale despite its profit contributions to Mattel by December 1973 as Mattel showed a $29.9 million loss in 1972.