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 1997, Mattel introduced Share a Smile Becky, a doll in a pink wheelchair. Kjersti Johnson, a 17-year-old high school student in Tacoma, Washington with cerebral palsy, pointed out that the doll would not fit into the elevator of Barbie's $100 Dream House.orty-five percent of them spend upwards of $1000 a year. Vintage Barbie dolls from the early years are the most valuable at auction, and while the original Barbie was sold for $3.00 in 1959, a mint boxed Barbie from 1959 sold for $3552.50 on eBay in October 2004.