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Koss Pro/4 AAASTEREOPHONE.
Brand New never taken out of the original box before!
KOSS Pro/4 AAAProfessional Headphones
Vintage 1977 RARE with Original BOX and all paperwork!
The Koss Pro/4 AAA are high-fidelity studio headphones that were popular in the 1970s and 1980s, especially among audio professionals.
Frequency Response • 10-22,000 Hz.
Elements • 15.5 cm2 in in2) radiating surface with a 25mm (1 in) diameter self-supporting voice coil.
Nominal Impedance • 220 ohm at 1 kHz.
Sensitivity for 100 dB SPL • 0.70 V rms sine wave at 1 kHz (0.24 V rms pink noise).
Earcushions • Exclusive Koss direct contour Pneumalite® Headband • Exclusive Koss Pneumalite dual suspen-sion; fully adjustable; glove-soft vinyl cover.
Boom Mount • Adaptable to all standard boom microphones; threaded shaft with anodized aluminum knob.
Cord • 3-conductor, coiled, lightweight tinsel wire, 3 m (10 ft) extended.
Weight, less cord • 440g (15.5 oz).
They are known for their sturdy construction and accurate sound, although their weight and high impedance may require a powerful amplifier to fully utilize their potential.
KOSS Pro/4 AAA Professional Studio
Headphones Pro/4 AAA Vintage 1977, lifetime factory warranty. Considered one of the best Headphones in the world.
MADE IN U.S.A.
