Many vintage tube amps were modified in the 70s and 80s. A technician might open a chassis expecting a stock circuit only to find a "surprise" custom-wound transformer that completely changes the gain structure of the unit. 2. Historical Context in Media
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A staple of 90s rock and metal. It used a tube preamp to get that "British Crunch" while keeping the price and weight low via a solid-state power section. Many vintage tube amps were modified in the 70s and 80s