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Sony IER-M9

In-ear monitor headphones

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Item # 158IERM9

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$1,499.99

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Overview

Our take on the Sony IER-M9

A few years ago, Sony made the conscious decision to rededicate themselves to great sound: precisely how they built their name in the first place. The IER-M9 in-ear monitor (IEM) headphones are a shining example of the company credo. Sony designed these IEMs for stage performances, but their highly accurate sound signature makes them a top choice for high-end headphone enthusiasts, too. 

Five-driver system for top-flight sound

A few years ago, Sony made the conscious decision to rededicate themselves to great sound: precisely how they built their name in the first place. The IER-M9 in-ear monitor (IEM) headphones are a shining example of the company credo. Sony designed these IEMs for stage performances, but their highly accurate sound signature makes them a top choice for high-end headphone enthusiasts, too. 

Inside each earpiece, there are five balanced-armature drivers tuned to deliver clear, resolving sound across a wide-frequency range. A dedicated "super-tweeter" armature reveals the finest high-end details. 

Professional-level noise isolation

Things get loud on-stage, and it's crucial to be able to focus on your specific instrument or vocal. Sony built these IEMs so professional musicians can do just that. I can tell you firsthand, it works well in an office setting, too. The IER-M9s knocked out outside distractions so I could focus on my tunes.

A large assortment of ear tips, for better fit and sound

We often talk about fit in terms of comfort. But getting a good in-ear seal has sonic advantages, too. Fortunately, Sony includes 13 different pairs of ear tips — maybe the most I've ever seen.

There are seven sizes of hybrid silicone tips, and six sizes of what Sony calls "triple comfort' tips. I personally preferred the latter. They were made of a soft, spongy material that helped create a comfortable, secure seal.  

Detachable, wrap-around cable options

Sony includes two wrap-around-the-ear cables with the IER-M9. I had to overcome a small learning curve to get the right fit — you wrap the cord around your ear like you've probably seen musicians and performers do with their in-ear monitors. Once properly secured, they felt like they wouldn't slide around at all, no matter how I moved my head. 

One cable includes an unbalanced 3.5mm mini plug. These in-ears are efficient enough that you can connect to your phone, but you'll get even better sonic results with a portable high-resolution music player. In fact, the second cable includes a 4.4mm balanced headphone plug so you make a balanced connection to Sony's NW-ZX300 Walkman®. Sony developed this new industry standard connection to help cut down on signal noise and distortion. 

Product Highlights:

  • in-ear headphones designed for studio and stage monitoring
  • wrap-around cord routing system keeps headphones secured to ear
    • professional-grade noise isolation
Penta-driver System:
  • each earbud uses five balanced-armature drivers for incredibly detailed performance
    • fine-tuned, realistic sound over a wide frequency range
    • "T-shaped" armature design helps reveal musical detail
  • dedicated "super tweeter" armature for greater high-end resolve
    • lightweight, rigid magnesium diaphragm delivers fast dynamics
    • silver-coated copper voice coil for true-to-life highs
  • rigid magnesium inner housing helps reduce vibration
  • sophisticated crossover system
    • custom-built film capacitor helps lower distortion
Accessories, Specs, and General Info:
  • two detachable cables included
  • 47" silver-coated oxygen-free cable with gold-plated 3.5mm miniplug
  • 47"silver-coated oxygen-free cable with balanced 4.4mm headphone plug
  • 13 pairs of ear tips:
    • 7 sizes of silicone tips for a customized, comfortable fit
    • 6 sizes of Sony's "triple comfort" soft ear tips for secure seal
  • cleaning cloth and carrying case included
  • frequency response: 5-40,000 Hz
  • sensitivity: 103 dB
  • impedance: 20 ohms
  • weight: 0.39 ounces (with cable)
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews
Details

Features and Specs

General
Noise-canceling No
Bluetooth No
Mic For Taking Calls ---
iPhone Control No
Lightning Connector No
Android Control No
Frequency Response 5-40k Hz
Sensitivity 103 dB
Impedance 20 Ohms
Weight 0.9 ounces
Cord Length ---
1/4-inch Adapter Included No
Volume Control No
Parts Warranty 1 year
Labor Warranty 1 year
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