SpinFit CP100 for IEM - SS - Patented Silicone Eartips for Replacement, Secure Fit and Supreme Comfort (2 Pairs) (for Nozzle Diameter from 4.5-5 mm)

Why did you pick this product vs others?:Does what they say they will

I have huge ear canals. Rarely do the tips provided by the manufacturer give me the necessary fit to make the experience of wearing earbuds a satisfactpry experience. These tips changed all of that.More often than not, the neckband really helps the tips stay on without slipping off. I have used them for the earfit test on Samsung buds and the pass. Many of the cases will still charge the buds with the Spinfits in place. That is not common with 3rd party tipsI could even get the tips to attach to the Soundcore Liberty 4 which have oval nipples. The collar hold those tips to any bud i use them with. The silicon tips are deceiving. The are extraordi9narily light in their grip on the ear canal. You don't necessarily have to grind them as deeply into the ear to get that seal for a good bass response.The great thing about these tips allowing for a light touch means that there can be a miniscule distance between your deep entrance to your ear and the tip. Not only does that reduce discomfort and pressure inside your ear, but it allows you to have more control over the bass response. Sometimes a tip driven deeply into an ear canal enhances the bass into unacceptable distortion.They are easy to use. You fold back the canopy and insert the sleeve over the nipple of the earbud. You then simply roll the canopy to its correct position. The one down side is that the individual buds might not fit back into charging case without removing the tip. Welcome to the joys of having big ears.Worth the price. It makes the investment into high-end buds a more successful enterprise.

After many months of searching for the perfect eartips to put on my various pairs of iems I can say without a doubt that the CP-100 lineup has been the most pleasant surprise from spinfit. For the first time in a long time an eartip gives a consistent, solid seal every time I place them in my ears, which is rare because I have massive ear canals. Gone is the stress of constantly jockeying with my iems to get the perfect seal, and worrying if they'll fall out or shift and break the seal.However, I do have problems with the sound signature these provide, especially when compared to my final audio type E's. When you put these on you do sacrifice some bass response for more treble, and that in and of itself isn't a problem, but the problem I had with them was sibilance. Dear God the sibilance. Many times when I would listen for a decently long period of time I noticed that S's in songs and high frequency stuff like cymbal crashes would freaking HURT. Like a really bad hiss in your ears for a split second, which was so disconcerting I would have to take them off. This took place on my campfire audio andromedas and atlases, and went away when I switched back to the type E's, so I'm fairly certain it does not come from the IEMs themselves.So, with all that being said, why 4 stars? Because I personally think that these are still great eartips, all things considered. They provide a wonderful, versatile fit, and I believe for most consumers that's more than good enough. The realization that you no longer have to worry or jockey your IEMs for the perfect seal is truly a joy to behold. So, if sibilance doesn't bother you than by all means, get these! If it does, then I highly suggest going for some Final Audio Type E eartips. They have a wide variety of sizes to chose from, and give an absolutely delicious bass response with a nice, rich, full sound profile. Also, no sibilance at all!

When selecting your Spinfits, there's a few things to keep in mind:1. They work well on metal IEMs, but sometimes not as well on True Wireless IEMs that have a different build. For some reason the comfort level on Galaxy Buds hasn't been right with the Spinfits, mainly because the shape is different. You'd think it'd be fine since the Galaxy Buds have a plastic build, but for some reason the generic tips on those are fine.2. THE BASS is very nice with these. I compared them to the Final Audio Black Silicone Eartips Fits, and it's a night and day difference. They're better than stock. These work great with the IEMs I've tried3. You should check how thick your IEM nozzle is before you buy. If you buy the CP360s for example, the diameter of the tips at the end that goes on the nozzle will be very small, which makes them prone to breaking when switching out and testing the earbud tips.4. These might run a little big? They take a bit to get used to the fit. I would say that a medium and small set are good for most people.5. These are much better than generic silicone tips, or even Monoprice tips. The comfort on these is like a 9 or 10/10, to where I often forget I'm even wearing earbuds. Monoprice is maybe a 7, and stock tips on Chi-fi IEMs can be far worse.6. Spinfits might be the best for certain IEMs, but you may need to try others. This is just the nature of having different standards for nozzles. I would look at forums for reviews of specific tips for IEMs. For KZ IEMs and some ther Chi-Fi, I think Spinfits are often a good fit, but you may need to settle for foam tips in other cases.Overall - It's All About The Tip:I mean these tips literally took my IEMs from being a 6-7/10 experience up to like a 9/10. It's a night and day difference. It's utterly bizarre that having the proper eartip on an earbud is such a big impact. It really makes you wonder how many people are reviewing an earbud and assuming it's bad because they're using the wrong tips. I'm buying a second set of Spinfits to gift to a friend with a second set of IEMs I have, because I found a great combination. I know that if I try to buy more Chi-fi IEMs in the future, I may wind up having to use something besides Spinfits, unfortunately, to get the right level of comfort.Overall, the company has done something truly unique with the eartips. I never knew IEMs could be this comfortable with the write combination. Definitely give these a try, be gentle with them, and if they're not comfortable, carefully return them and try something else if they don't work so that this great company doesn't lose out on a potential resell. I don't actually have another good recommendation for tips besides these at the moment, but I've heard good things about foam tips from companies like Comply and even generics off of Aliexpress.