A stunning Harman Kardon Citation II B power amplifier. Designed by Stu Hageman and introduced in 1959, it's considered by many to be one of the greatest Golden Age amplifiers. Photo by Howard Kneller, from The Audio Classics Collection.
Citation II B, side view. Those brown transformer covers just scream "vintage."
Citation II B bias adjustment selector. Turn it to the "off" position when the amp is operating!
Because three speeds are better than one. 1950s Webcor ad.
Or maybe she's listening to Nine Inch Nails. Tung-Sol ad, circa 1930s or 1940s?