IE 100 PRO Wireless Monitoring Earphone - Black with built-in mic for your mobile phone, PC or tablet. Passive noise cancelling & 10hours battery life

Sound quality: neutral sound, a bit on higher side. Low is very good and clear. Sound signature is really of my taste. Crystal clear, crisp, on point sound. Most noticeable attribute is sound stage. Very wide spacious sound stage. Build quality: very comfortable and light. Best fit in ear. But feels delicate specially on the point of connectors. Connector: the connector is not typical ‘MMCX’ type. It is Sennheiser exclusive connector. This is the only drawback i have found. A universal connector helps in having choices over buying different quality and of different length of cable. Though the cable quality is very good. Soft and durable. Bluetooth connector: Bluetooth connector is just for casual listening. I noticed a huge difference in sound stage while shifting from wired to Bluetooth connector. With Bluetooth connector it sounds just like any other Bluetooth earbuds half the price. So I never use Bluetooth. It is just for ‘just in case’ type of purpose. Overall I found it to be really good sounding and best fit among all other earphones in my collection. I have bought it in 8.7k with Bluetooth adapter which is a great deal. ** The wireless version is not just wireless. It comes with both 'Bluetooth adapter' and '3.5mm cable'. So wireless version is basically the wired version along with an additional Bluetooth adapter. See the box contains in my uploaded picture.

This is definitely the worst tech purchase I’ve made in a while. For a brand like Sennheiser and a ₹10,000 price tag, I expected significantly better quality across the board. Sound & Build: The sound quality is just okay—there is absolutely nothing extraordinary about it that justifies the cost. Worse, the construction feels incredibly cheap and plasticky, completely lacking any premium feel. The Dealbreaker (Bluetooth & Mic): The absolute worst part of this package is the Bluetooth adapter. The call quality is practically unusable; it's nearly impossible to hear anything meaningful on the other end. To make matters worse, the microphone seems to pick up every single ambient sound in the room except your actual voice. Battery Life: Rounding out the flaws is the terrible battery life on the wireless module, which drains far too quickly for reliable daily use. Verdict: I strongly advise against buying this. It’s severely overpriced for the poor experience it delivers. I wouldn't recommend this to anyone.

Wired output is best. Great sound quality

Osadharon... Raat din er Songi amar... osadaron sound clarity & quality.. Battery life ektu kom... baki absolutely No complain..

Good

Keep saying volume max on iphones when typing. Very irritating. Other than that mic is awful never picks up voice even for phone calls or skype calls.

I recently acquired the Sennheiser IE 100 Pro, and while I’m pleased with its sound quality, I find myself grappling with build quality issues. Here’s a breakdown of my experience: Sound Quality: The IE 100 Pro lives up to Sennheiser’s reputation. Its sound signature is impressive, with clear trebles and a well-defined bass. I appreciate the balanced audio output and minimal distortion. Build Quality Concerns: Unfortunately, the build quality leaves much to be desired. The cable is prone to flaking and fraying, which is frustrating. Moreover, sourcing a replacement cable in India is challenging. Unlike standard MMCX connectors, the IE 100 Pro uses a proprietary cable, limiting our options for replacements. Longevity Worries: When I invested in these earphones, I expected them to withstand regular use. After all, the convenience of not discarding a good pair of earphones when the battery dies was a significant selling point. However, the wire didn’t even survive a year before showing signs of wear. Warranty Process: I’ve initiated a warranty claim for my IE 100 Pro, but I’m concerned about the long-term scenario. If the wire fails again after another year, I’ll be out of warranty and facing the same predicament. Déjà Vu with IE 400 Pro: Interestingly, my experience with the IE 400 Pro mirrors this situation. The wires on that model also suffer from fraying and flaking at the joints. In summary, while the IE 100 Pro delivers exceptional sound, its build quality falls short. Sennheiser should address these issues promptly to ensure a more durable product for its discerning customers.

I'm writing this review again because my first 3☆ review got deleted by either Amaz0n or S3ller, maybe because I used bad word or said too much? So this time I'll make this review simple & writing it after 2 months usage. first let me makes you understand meaning of Audiophile or what audience these IEMs are for. IEMs are for those who love to listen original Natural sounds Music coming out of Studios & we call them Audiophiles or for those who work at Audio Studios & create Music without boosting any level of any Instrument they recorded in big Halls or Operas. as for us Music lovers who only love to listen bassheads, Rock or some of us do love Natural sound music but also want some punchiness & little boost increase in bass? so let me tell you these IEMs aren't for us, we're good with our 800 - 5k Earphones like old Sennheiser CX series & other brands' good earphones. as I said in Title "not for Punchy, Bass & Bollywood style Music lovers" it because this IEM has not Punchy type feelings nor good Bass like your old CX 180 or CX 275s have, of course it does have far better instrumental sound quality but it still feels behind in Female & Male voice performance when you listen Music or in simple words this IEM do focus more on Instruments than singers' voice, which won't makes your body dance by it's own like Magical sounds of old CX series(don't go for current new series) used to do with their Balanced sound between both singer voice & instruments with punchy bass when they were in stocks plus they were far more cheaper in price than these one. still I could recommend you these IEM only if it's price started from 7k instead of 10 or 13k for Bluetooth version(it because it's range is really low like under two rooms & if you go any far you'll get lag also sounds low too compared to Wired version) & 5.8k for only Wired verison(because wired version has lesser bass than it's Wireless version, also if you'll increase your volume over 80% you'll get near no Bass & for optional con is No Mic because as I said IEMs for Studio work only Not for vacation or outdoors). so in short if you're Natural Music listeners without caring about Bass then go for these IEMs if you're like me who love Natural & balanced punchy Bass Music(for ex: CX 180 & 275s) then you shouldn't go for these IEM, also stay away every type of IEMs & if you're one of those who do wanna try IEM for first time but also limit with budget then I'll suggest you go for those under 3k Chinese IEMs instead of wasting 10k so you won't had to regret later as I'm regretting. (Suggestion for Sennh3is3r company please reduce the size of Medium size buds they kinda uncomfy & also please bring back Old CX Series otherwise New CX Series only creating E-Waste in Amaz0n as you can see how many Renewed version of current CX Series about to touch Fresh version, also it's hurts us Fans' hearts too, so please bring Old CX series back🙏)