Fresh from the year 1982. PRO/4X Stereo Headphones Dual element stereo headphones combine rare earth moving coil element with piezoelectric element in each earcup to provide a 10-40,000 Hz frequency range. Closed design headphones weigh only 10 oz. come with coiled cord; labeled left/right earcups; adjustable headband $85 adjusted for inflation $229 in 2021. Enjoy!
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