Sony MDRMA900 Specification Guide

Breathe new life into your favorite music and movies with MDR-MA900 

stereo headphones. Revel in a broad, dynamic yet natural sound field 

produced by the lightweight, open-air design, 70mm drivers, and high-

energy Neodymium magnets, in conjunction with an Acoustic Bass Lens.  

Open Air

An open-air design delivers not only a lightweight, comfortable, and airy feeling, but also creates 

a natural sound field that mimics listening to music without headphones. 

70mm Diaphragms 

Specially developed 70mm driver units deliver high-resolution sound with a wide, dynamic range. 

Acoustic Bass Lens

Acoustic bass lenses help deliver rich bass response by concentrating  the bass impact at the 

center of the driver.

High-Power Neodymium drivers

360 kJ/m

3

 neodymium magnets provide rich bass and clear mid-range response.

Perfect for home use

A 3.0 meter, single-sided cable with Unimatch plug allows connectivity to various audio devices. 

Specifications

© 2012 Sony Electronics Inc. All rights reserved. Reproduction in whole or in part without 
written permission is prohibited. Sony and the Sony logo are trademarks of Sony. Features 

and specifications are subject to change without notice. Non-metric weights and 
measures are approximate and may vary. /Updated: March 30, 2012

Audio

Driver Unit

Open circum-aural, Dynamic

70 mm, dome type (OFC Voice Coil)

Frequency Response

5 - 40,000 Hz

Impedance

12 ohms at 1 kHz

Sensitivity (db)

104 dB/mW

General

Design

Over-the-head, Monitor

Diaphragm

PET

Headband

Wide, Adjustable

Magnet

Neodymium

Plug

Gold-plated stereo mini plug

Hardware

Cord

118 1/8 in. (3 m) Single-sided OFC Litz cord

Power

Power Handling Capacity

700 mW

Weights and Measurements

Weight (Approx.)

6 7/8 oz (195 g) without cord

Accessories

Supplied Accessories

Operating Instructions (1)

MDR-MA900

Sony® Stereo Headphones