The Sony IER-M9 and IER-M7 are the Musician’s Dream Headphones

Sony recently introduced two new in-ear stage monitor headphones, the IER-M9 and IER-M7. They provide the best tonal balance for monitoring your play on stage with absolute sound isolation and a stable fit to avoid the headphones falling off during a performance.

Using the Sony IER M7 in a performance

These headphones were developed to monitor even musical expression with addition to tone colour and rhythm. With the IER-M9 and IER-M7, even audiophiles will be able to experience first-hand this musical expression tuned for professionals.

Multi Balanced Armature (BA) System

Newly developed by Sony, the multi BA system enables musicians to not only feel the rhythm and pitch but also the detailed nuances of their live performance. The IER-M9 and IER-M7 have the ability to reproduce tone that is true to the original sound, allowing musicians to monitor the sound balance of their own performance on stage.

Sony IER M9 Sound Path

The IER-M9’s Penta BA driver system (5 BA / 5 way) includes a super tweeter while the IER-M7 has a Quad BA driver system (4 BA / 4 way). Since the sound quality of a driver unit is critical andthe  consistency of sound signatures between BA units is important to harmonise tonal balance, Sony made sure to develop each driver unit in-house with these criteria in mind.

Sony IER M7

The Sony-developed BA unit has two major structures – a direct drive structure and a T-shaped armature. Sony has developed the direct drive structure which sees the armature efficiently drive the diaphragm directly thus delivering oscillation of the armature linearly. The T-shaped armature has a symmetrical vertical motion delivering linear response. These two structures bring high definition sound required for monitoring use.

Sony IER M9

Ensuring Isolation and Stability

Using an ear-shape database collected over decades of research, the outer housing shape is designed for isolating noise and a stable fit. For optimal sound isolation, the housing has a firmly closed noise blocking structure that shuts out external sounds from the eardrums. 13 variations of ear buds (six variations of triple comfort earbuds and seven variations of hybrid earbuds) and pre-formed ear hangers hold the headphones firmly.

Sony IER M7 Cable Holder

The IER-M9 and IER-M7 will be available at selected Sony Stores, Sony Centres and Sony authorised dealers from early September 2018.