Professional IE 100 PRO Dynamic In-Ear Monitoring Headphones, Clear

These are going to be my first dip into pro-ish level in ear monitors. When it came to other iem's that I have tried, I have only ever bought consumer level in-ears and some of the budget oriented monitors from KZ like the ES4 and ZSN Pro X. This is actually my first Sennheiser as well so I was rather excited due to the company's lineage and experience. Inside the box was nicely laid out and came with everything I needed. The only gripe I had was the little "bag" that was meant to hold the iems in. It's one of those "snap bags" but instead of having a magnetic clasp to keep them closed, its just two bits of stiff plastic that keep it closed by simply being rigid, and if you want to open the bag you push in the sides to snap it open. They really should have included a zippered bag of some kind because that would have been simpler. The comfort of the monitors is simply great. They're small and could fit into most ears and the stiff over ear hook can easily be bent into any shape to fit any ear. Some might not like the wire design but I think it works out just fine. One very important thing to note about the silicone and foam ear tips is the cylinder of foam on the inside. Please take care when switching out tips because this foam is CRUCIAL to keeping the sound profile right. Yes, even though you can swap out the tips for more comfortable ones, you will have a VASTLY different sound profile due to the lack of dampening foam. Also, be sure to double check the nozzle itself because it too has some foam inside. For the most part, just be careful when switching tip sizes and use the cleaning tool to orient the tubes of foam so they sit correctly inside the nozzle and ear tips. I know it sounds like a hassle, but once you are aware of it, there should be no issues. For the sound quality. I have to say that these things are well balanced with some boost in the trebles that add a bit of brightness to each song. Snare drums and cymbals sound a bit more forward, but this is where the small fault comes in. There will be some songs in which the "S" and "T" sounds from vocalists will be a bit harsh, but not unbearable. Think about how recording a voice sounds like without a pop filter and you will get the general idea of what I'm talking about. This doesn't mean the sound is totally bad, far from it. It's just a warning that some tracks with certain lyrics will not sound the best unless the mastering of said track is a bit warmer. I have tried many genre's with these monitors and I will say all of them are pleasing and detailed. Even the bass is well tuned and you can get a nice thump, nothing that is head rocking and muddy but good enough. I will say that these do fit within the pro range and have a rather flat curve, in spite of what you might see on some frequency response graphs. I will say that minus the occasional shrill tracks you might run into, these will fit most, if not all genres of music. In the end, these are indeed pro level in-ears that you can get for a mere $100 and they will not disappoint. If you want to hear familiar tracks in a different way, I would recommend these. But also be sure that you are listening to a good source because the clarity of these in-ears will reveal badly recorded or low quality sound files very easily. A definite must-have for music enjoyers.

They are amazing for what you get. I have tried multiple other IEMS, and have found myself coming back to these time and time again. They are super comfortable, and the clarity for price is otherworldly. Bass is tasteful, mids are great and the highs are maybe just a little tinny. Ensure that you have something good driving them though, as I do notice a staggering difference in sound quality from something like an iPod vs my Mac or desktop computer.

I got these on sale for around $85, and for the price, they offer great value. My primary use is casual music listening in the office. The clarity is excellent, and the sound is fairly neutral. Using Apple Music’s equalizer allowed me to get a bit more bass out of these headphones. I can easily distinguish different instruments. They come with multiple earbud tips, ranging from small to large in silicone and a medium foam option. The medium foam tips provide good passive noise cancellation. Overall, it’s a very nice purchase and a definite step up from Apple EarPods, which tend to muddy the sound.

Overall, I'd rate this 3.5/5. For reference, I bought these IEM's for live performance at my church. Keep my use-case in mind during this review. These fit my ears really well, and they ship with a few extra tips you can use if your ears are bigger or smaller. I have a pair of Sennheiser HD6XX headphones that I use for most of my music listening during my hours at work. In comparison to the headphones I am used to, these IEM's are very treble-y, but they still have some bass. If you are looking for a "neutral" sound, do not buy these. For the price, I think these are a good value for the money. My plan is to use these until they break and then I will upgrade to a better pair of monitors. I mainly play bass and guitar, and these will work great for that use case. I think I would recommend different monitors if you are a vocalist though. The treble is a little much.

Been using other brands for stage performance but wanted to try these and i am pleasantly satisfied on the first try! Plug and play

Update May 2026: Unfortunately these just quit on me the other day. Right in the middle of a song , out of nowhere they just stopped working. Very disappointing because I really liked the audio quality. I’ve had the product for only 7 months. Now I have to hope the company will replace them if they’re still under warranty. I’m reducing my rating to 3 stars. And if they don’t replace them it’ll be down to 1. Original review October 2025: I play electronic drums and earlier this year I bought some over the ear studio monitoring headphones. It was an Amazon bestseller for around $50. They are comfortable and pretty decent sound quality. But there are times throughout the songs I play where the different drums / cymbals would kind of get muddled together, for example the kick got lost in the mix or I couldn’t always hear high hat notes. Thought either maybe I wasn’t striking the drum hard enough at times or it was just a sign of my 47 year old ears failing on me. Today after researching IEMs for about a week , I received in the mail these bad boys. My concern about my playing or failing ears vanished when I put these on earlier today. The clarity is fantastic , i can hear all the notes clearly now from the low bass to the high end clarity in the cymbals. When I purchased it last night ( fast next day prime shipping) I honestly thought there really wouldn’t be much of a difference compared to my other ones. I actually expected to return them before I even got them. But not anymore. These are my new go to earbuds when I’m drumming. HUGE improvement. Only knocked off one star ( if we could do half , I would have given 4.5 stars) because the cord is rather short in my opinion. Theres obviously remedies for that problem. But just a minor inconvenience. Not a big deal.

Great sound quality, no complaints. Will update if anything changes

Absolutely amazing sound

I rated 5 stars because they work for what I want (monitors for guitar practice). Pros Extremely light and comfortable Fit very well to the point I forget I'm wearing them. Audio quality good enough for my purpose. Probably won't fall even if you get a kick in the face. Cons You won't get a lot of bass (again, this is not for day to day audio listening) Audio isolation really depends on how well the tips fit your ears, don't expect magic to happen. These are by no means a super high level pro device but for my in house guitar practice it is amazing. Don't buy these expecting you are going to get concert grade IEM. My only regret is that the wireless version is a couple dollars more, probably would've got that one if I knew before.

Halten sehr gut in den Ohren auf der Bühne, selbst beim Tanzen mit den wildesten Kopfbewegungen. Sound auch super, leistet mir seit Jahren gute Dienste auf der Bühne.

Very good earphones for a good price

Entrega rápida, ya los probé, están geniales.

Great build and sound quality.