![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/c-dynaco-amp-1.jpg)
Simple design, good sound: A Dynaco Mark III mono power amplifier, in Dynakit kit version. Introduced in 1957, Dynaco was known to some as the "poor man's Mcintosh."
![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/c-dynaco-amp-2.jpg)
![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/c-dynaco-amp-3.jpg)
Rear and side views of the Dynaco Mark III. Photos by Howard Kneller, from The Audio Classics Collection.
![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/c-voice-o-graph-1940s.jpg)
Tell me Jack White wouldn't want one of these! Oh, wait...he already has one. 1940s Voice-O-Graph ad. Courtesy of Martin Theophilus/the Museum of Magnetic Sound Recording.
![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/cc-Telefunken-ad-1959.jpg)
Magnetic attraction: 1959 Telefunken ad, courtesy of Martin Theophilus/the Museum of Magnetic Sound Recording.
![](https://cdn.shopify.com/s/files/1/0672/2283/1394/files/c-1977-ampex-m1200-ad.jpg)
Mm-mm-good! Ampex MM-1200 multitrack recorder ad, 1977. Courtesy of Martin Theophilus/the Museum of Magnetic Sound Recording.
Howard Kneller’s audio and art photography can be found on Instagram (@howardkneller, @howardkneller.photog) and Facebook (@howardkneller).