Sony IER-M9
Sony IER-M9
Sony IER-M9
Sony IER-M9
Sony IER-M9
Sony IER-M9
Sony IER-M9
Sony IER-M9

Sony IER-M9


Discover a new realm of musical expression

Discover a new realm of musical expression

On stage, the IER-M9 In-ear monitor headphones authentically reproduce raw emotion and musical nuance. The IER-M9 In-ear stage monitor headphones are designed to stay firmly in place so you can capture all the emotions you express in every performance.

Product Features

Faithfully reproduce every performance

With a Penta Balanced Armature system including magnesium super tweeter, integrated magnesium inner housing and an optimised sound path, these stage monitor headphones faithfully reproduce even the most subtle sounds and emotions.

Penta Balanced Armature system for optimal stage sound

For clean high notes, natural tones and the pure emotion behind every performance, the IER-M9 has a Penta BA system including a magnesium super tweeter. Sony’s original T-shaped Balanced Armature directly drives the diaphragm for a more linear motion and clean, faithful high notes.

Magnesium diaphragm super tweeter

The IER-M9 super tweeter diaphragm is made of light weight and rigid magnesium alloy to deliver the fast dynamic transient of performance. The unique BA unit design also benefits from extremely low resonance thanks to high internal loss.

Audio grade film capacitor for less distortion

Our custom audio grade film capacitor in the cross-over circuit delivers much lower distortion. The audio grade capacitor of the IER-M9 delivers fine detail sound. Plus, audio grade solder also helps minimise any loss in signal path.

Beautifully designed for accurate tonal balance

With an integrated magnesium inner housing and optimised sound paths, the IER-M9 headphones deliver balanced tones and every nuance of your performance.

Finer details and musical expression captured without loss

Silver-coated oxygen-free copper cables, a natural silk braid cable insulator with non-magnetic undercoat plug and a 4.4mm standard balanced connection cable give less sound degradation, finer detail and faithfully reproduced musical expression.

What’s in the Box

  • Sony IER-M9

Technical Spec

Weight: Approx. 26 G Without Cable
Headphone Type: Closed, Hybrid
Driver Unit: Hybrid
Impedance (Ohm): 40Ohms (1Khz)
Frequency Response: 3Hz-100,000Hz
Sensitivities (Db/Mw): 103Db / Mw
Cord Type: Detachable Y Type
Cord Length: Approx. 1.2 M (48 In) , Silver-Coated Ofc Strands
Plug: L-Shaped Non-Magnetic Gold-Plated Stereo Mini Plug / L-Shaped Non-Magnetic Gold-Plated Balanced Standard Plug

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