Photo: Front panel of 150W Overdrive Special by Dumble (photo by Tom McGrath) Howard Dumble was a guitar amplifier manufacturer in Los Angeles, California. In the one-person operation, Alexander “Howard” Dumble made each amp personally. Because of this, Dumble amplifiers are the most expensive boutique amplifiers on the used market, and prices have risen rapidly. In 2012, Vintage Guitar magazine described the Dumble Overdrive Special as the most valuable in the product line, with used amplifiers fetching between $70,000 and $150,000. Other examples have sold for more.
Dumble built two or three amplifiers per year, primarily for celebrity musicians and studios. He priced them similarly to the used market to dissuade resale. Dumble serviced and refurbished his original amplifiers for a fee, and many players buy used Dumble amplifiers and had Dumble refurbish them. Carlos Santana and Ben Harper, for example, both bought their first Dumble used, and had Dumble refurbish the amp for their particular playing styles.
https://en.wikipedia.org/wiki/Dumble_Amplifiers
Howard Dumble, Maker of Dumble Amplifiers
