Sennheiser IE 100 PRO BLACK In-Ear Monitors | Dynamic 10mm Broadband Transducer for Powerful, Precise Monitoring | 1.3M Cable & S/M/L Silcone Adaptors Included | Black (508940)

These Sennheiser IEMs were purchased for one specific purpose, which was to provide me with a nicely isolated and high quality fold-back audio mix on stage whilst performing. The earbuds fit well into my ear with the rubber grommets supplied, with the option of other sizes in the pack for different shaped ears. I put them on back to front first of all, and whilst they fit OK, they do work a whole lot better the right way round. The part of the cable that curves over the top of your ear is pliable and comfortable, ensuring a comfortable fit. Without going to the trouble and expense of going to a specialist to get a mould of your ear made and then a perfectly tailored pair of IEMs, this is an excellent and cost-efficient alternative. I wear them for hours at a time and they remain comfortable. Sound isolation is good, so you don't have to have the volume cranked up to the point that your ears ring after prolonged wearing. A pleasure to use and exactly what one expects from this brand. Recommended.

Sturdy. Use them for walking. Good sound. Worth the price. Buy cheap buy twice.

Using these for live in-ear monitors when gigging. Really clear and balanced sound with a reasonable degree of noise reduction. They don't have active noise reduction so don't expect it but they provide enough to block cross contamination even with foldback volume low so reduces ears ringing for days after a gig. They do become a little uncomfortable after a while but we tend to play 2 - 2.5 hours without a break which is a long time with any ear buds.

I'm so pleased with these. Very comfy fit and crisp clear sound.

Sounds fine, lacking in bass but nothing that a good EQ preset can't fix. Fits fine, sits comfortably in the ear and includes 3 basic sizes of silicone ear tip. But boy how disappointed was I when I found out that these use a proprietary connection, instead of MMCX like Sennheiser normally use? And spending £82 for a new item but receiving an open-box return added more insult to injury, but I digress... Maybe the proprietary connection is necessary for the bluetooth cable which converts these into wireless monitors, but if that's the case then they should drop the "PRO" from the product name. To me "pro" implies that I can use these in a professional setting, and if that professional setting means that, for example I need to swap the 3.5mm cable for a standard, off-the-shelf 2.5 or 4.4mm cable, then I should be able to do so with a standard, off-the-shelf 2.5 or 4.4mm MMCX cable, not spend ages looking for an overpriced, custom cable with non-standard connections that doesn't ship to the UK. So yeah, probably fine if you only need 3.5mm or the additional wireless connectivity, but if you need something "Pro", look elsewhere.

Basic piece of kit, not very flashy, but it shows that all the attention went to the sound. Sound is good. No harsh peaks. Bass is much clearer than I expected and reproduces deep rumble without being overpowering. Slightly uncomfortable for long seshes, but my ears have got used to them. Worth the money I'd say.

Sennheiser should be embarrassed about producing these. They have the weakest bass response ever, I would compare them to the tone of the cheapest earphones on the market. Don't waste your money, why would the entry level earphones in this range have no bass?! Utter rubbish, I would give 0 stars if I could.

And it should be for the price. It is a bit bass heavy for my tastes, but not enough for me to be upset by it. Definitely high quality, if not a bit overpriced for the product you get. Detachable cable is a win, means that you dont need to buy an entirely new pair of IEMs every time you frey the cables. However, the replacement pricing is a bit underwhelming. Half the price to replace the cable if you get a first party kit. Double that for a bluetooth kit. Might as well have the connectors soldered on and covered in silicone and thick sheathing for that price. Kind of like spitting in your face while shaking your hand. Just hope that someone has made an aftermarket kit that is affordable and reasonable for what you can find in USB cables for a third the price :/ Additionally after a few months of use the glue in the IEM housing weakened to a point where I could separate the 2 pieces of plastic where the driver is located. After a year the right piece stopped working entiely, and it is not a cable issue. Not buying a sennheiser branded iem for the foreseeable future