Proprietary Sony T-shaped BAs directly drive the diaphragm for a more linear motion and clean, faithful high notes.
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.
Internal wiring is upgraded with a new silver-coated copper voice coil and gold-plated terminals, faithfully reproducing sound without sacrificing even micro signals so pitch, harmonics, and emotion are portrayed.
With an integrated magnesium inner housing and optimised sound paths, the IER-M9 deliver balanced tones and every nuance of your music.
A highly rigid housing keeps the BA units firmly in place, helping to eliminate vibration and keeping sound clear without losing even the most minute detail in your sound. A wide and short sound path made of magnesium alloy reduces frequency peaks and dips, to give a monitor sound you can rely on for critical listening accuracy.
A silver-coated oxygen-free copper cable and natural silk braid cable insulator with non-magnetic undercoat plug with a 4.4mm is Sony's finishing touch for less sound degradation, fine detail and faithfully reproduced musical expression.
The IER-M9's light magnesium housings are designed to stay firmly in place with a snug fit for all ear sizes. With firm fit and optimal housing shape, each earbud stays in the right position, even while moving on stage.
Also view all of Sony's other releases here, or our other IEMs here.
Driver 5 balanced armatures
Frequency response 5Hz-40kHz
Sensitivity 103dB SPL/1mW
Cables 1 x 3.5mm; 1 x 4.4mm