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About this gear
The ESP-7 builds on the ESP-6 foundation, representing Koss's continued refinement of electrostatic headphone design in the early 1970s. As a stepping stone in the ESP evolution, it likely offered incremental improvements in driver efficiency and tonal balance while maintaining the open, airy character of the electrostatic platform.
About Koss
American headphone pioneer founded in 1958 by John C. Koss in Milwaukee — credited with inventing the first stereo headphone (the SP/3). Koss's Porta Pro, introduced in 1984, remains in production and is one of the most beloved headphones ever made, offering remarkable sound quality and musicality a...
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