Sony IER-M9

Sony IER-M9 - IER-M9

Sony IER-M9 5BA Flagship Detachable HiFi Audiophile In-Ear Earphone IEMs


Discover a new realm of musical expression

One stage, the IER-M9 in-ear monitor headphones authentically reproduce raw emotion and musical nuance.

Faithfully reproduce every performance

With a Penta Balanced Armature system including magnesium super tweeter, integrated magnesium inner housing and an optimized 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 IEM-M9 has a Penta BA system including a magnesium super tweeter, Sony's original T-shaped Balanced Armature directly drivers the diaphragm for more linear motion, and clean, faithful high notes.

Magnesium diaphragm super tweeter

The IEM-M9 super tweeter diaphragm is made of lightweight 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.

Audio grade film capacitor for less distortion

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

Beautifully designed for accurate tonal balance

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

Integrated magnesium inner housing to reduce vibration

A high rigid housing keeps the BA units firmly in place, helping to eliminate vibration and keeping sound clear without losing even the most minutes detail in your sound.

Optimized sound path

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.

Finer details and musical expression captures without loss

Sliver-coated oxygen-free cables, a natural silk braid cable insulator with non-magnetic undercoat plug and a 0.17" standard balanced connection cable give less sound degradation, finer detail, and faithfully reproduced muscial expression

Balanced connection

0.17" standard balanced connection cable separates left and right sound signals completely, which minimizes cross-talk that results in sound deterioration.

Sliver-coated OFC

Silver-coated, oxygen-free copper wire minimizes resistance and signal-transmission loss. The result is less sound degradation, finer detail, and smoother treble sounds.

Silk braid insulator and non-magnetic plug

Vibration is absorbed by the silk braid cable insulator to minimize rustling when the cord is touched. A gold-plated plug with non-magnetic undercoat preserves signal purity.

Detachable cable

The cable can be replaced if needed, or to fine-tune your monitor sound through a different cable.

Own the stage and the moment

The IER-M9 in-ear stage monitor headphones are designed to stay firmly in place so you can capture all the emotional you can express in every performance.

Pre-formed ear hanger for easy positioning

The IEM-M9 stably fit your ears thanks to the universally shaped ear hanger which is easy to position even in the dark

13 variations of earbuds

Six triple comfort and seven hybrid silicon earbuds let you find a snug fit for all kinds of ear shape. Combining gard silicone rubber and specially developed formed silicom=ne, they perfectly match sound with stability and are comfortable to wear for long periods of time.

Light, durable magnesium outer housing

These in-ear headphone are designed for hard-wearing durability against knocks or accidents.

Stable fit

The IEM-M9 are designed to stay firmly in place with a snug for all ear sizes, With a firm fit and optimal housing shape, each earbud stays in the right position, even while moving on stage

Designed with professionals

We developed these in-ear monitor headphones cooperating with professional musicians and live-sound engineers. Their opinions are reflected in this product.

Specifications and features

Discover a new realm of musical expression, in the studio and on the stage with IER-M9 In-ear monitor headphones designed for musicians. With 5x unique Balanced Armature drivers from Sony, including a magnesium diaphragm and gold-plated terminals, every musical nuance is authentically reproduced.

Penta BA system

Magnesium diaphragm super tweeter

Sony's original design BA Driver Units

Light and durable magnesium outer housing

Pre-formed ear hanger for stable fit

Frequency response:5 Hz–40,000 Hz


Sony IER-M9

Triple comfort ear buds: SS, S, MS, M, ML, L

Hybrid silicone ear buds: SS, S, MS, M, ML, L, LL

Carrying case

Cable holder

Cleaning cloth



Will ship via DHL/UPS/EMS/FEDEX

 It is required to put your phone number on the parcel, please leave us your contact number when you pay.

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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 7822
  • Brand: SONY
  • Product Code: IER-M9
  • Availability: In Stock
  • $1,399.00

Tags: Sony IER-M9, 5BA, 5drivers, Detachable