Sony MDR-7506 (1991)

Name: Sony MDR-7506
Brand: Sony

A closed-back professional headphone introduced in 1991, widely used in studio environments for mixing and recording.

Overview

The Sony MDR-7506 is a closed-back, over-ear studio headphone from Sony, introduced in 1991. It was built for professional use and became a staple in recording, film, and live sound. It folds up, and the closed enclosure blocks outside noise well. The drivers are 40 mm neodymium. It is known for durability, serviceability, and consistent performance across decades of use. People mostly praise its sound accuracy for mixing, though some users report problems with cable reliability and comfort during long sessions.

Specifications

Product type	Closed-Back Professional Headphones
Driver Size	40 mm
Impedance	62–63 Ohms
Frequency Response	10 Hz to 20,000 Hz
Connector	Straight 3.5 mm jack
Adapter	Screw-mounted 6.3 mm adapter
Weight	230g (excluding cable)
Max. power rating	1W
Design	Foldable
Enclosure	Closed design

Design

The MDR-7506 is a simple, proven build with a closed-ear design and 40 mm neodymium drivers. It folds for portability, and the closed-back enclosure gives good passive noise isolation. The driver membrane measures 36 mm. The pads and cable parts are replaceable, so the unit is meant to be fixed rather than thrown out.

Context

Introduced in 1991, the MDR-7506 has been a reliable studio workhorse for over three decades. Recording engineers and sound professionals have long favored it, and it is trusted across the audio industry as a reference-grade monitoring tool. Newer models have come along, but the 7506 still has a strong presence in professional environments.

Market

The Sony MDR-7506 turns up on used goods platforms such as Mercari and still retails for around $80 USD. Common problems are broken drivers, loose wire connections, and bent plugs, which lead to one-sided audio or complete signal loss. User reports describe failures such as sudden right-channel dropouts or total sound loss within months of use. The design is serviceable, though, and pad and cable replacements extend its lifespan.