The IER-M9 In-ear headphones stably fit your ears through the universally shaped ear hanger. As a long-time fan of Sony’s exploits in the IEM realm, the M9 continues to showcase the Japanese conglomerates’ impeccable ability to continuously innovate and create spectacular products.
IER-M7 has a more premium nozzle compared to IER-M9 – the nozzle is made of brass. I can feel the sub-bass presence after listening to the IER-M9 – the difference is drastic.For those who are familiar with Sony’s ear tips’ price, you should be able to calculate how much “rebate” you are getting from these 12 pairs of ear tips from the box!The details of each track are managed well by both models – deliver smoothly to the users. This fiber works as an absorber against vibration and prevents rustling or bumping noises when you touch the cord. Combining hard silicone rubber and specially developed formed silicone, they perfectly match sound with stability and are comfortable to wear for long lengths of time.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.The cable is fully detachable so you can replace it if needed, or fine-tune your monitor sound through a different cable.The IER-M9 uses silk braid as a cable insulator. The slightly recessed mid-bass in the IER-M9 makes a good space for full-bodied mids to flex its muscles.Because of the lean presentation in bass and mids of IER-M7, the space and air in the highs are more prominent, making it more sparkly compared to IER-M9.
This made IER-M9 to be more engaging. This silk braid insulator is not used on the IER-M7 – the internal braid of cable can be seen through from the transparent plastic insulator.In designing IER series, Sony implemented their custom audio grade film capacitor in the crossover circuit. The gold plating of the plug has a non-magnetic undercoat which transfers the signal preserving subtle nuances.The IER-M9 In-ear monitors come with a 0.17" standard balanced connection cable which separates left and right sound signals completely, unlike conventional headphone cables where both channels share a ground wire. It can be coiled and stored neatly in the storage case provided. I don’t experience any difficulties in inserting them into my large ears. Ultimate Silver Sony IER Z1R IER-M9 IER-M7 mmcx upgrade cable $192.03–$242.86 Very noticeable upgrade and step over the standard cable! To hold the quad and penta drivers, a highly rigid housing was crafted to keep the BA drivers sturdy in place. However, for those having smaller ears, Sony’s IER series might not be a good choice.Different from previous hybrid series, the new IER series now has a more balanced and neutral tuning to achieve the referencing characteristic. The audio grade capacitor of the IER-M9 delivers fine detail sound.