SpinFit W1 for IEM - MS - Patented Medical-Grade Silicone Ear Tips, Double W-Shaped Tube Core, More Stability

bought these to put on my 7hz salnotes zero and zero 2 IEM's (so far I've only tested the regular Zero). I was having issues with chaffing on a regular pair of JLab M silicone tips that made me switch to their small cloud foam tips, this changed the sound profile a bit by reducing treble just slightly, but those being foam it also made a better deal which helped the bass a bit on those which sit a little back in the sub-bass area (regular zero lack that thump due to a more analytical tuning).So, I wanted to give silicone tips a try again and came across these, the medical grade silicone is soft but sticky and makes for a great seal in the ear, I haven't felt any itching or chaffing so far after a few hours, so I can so far say that the regular silicone tips I used before are no longer going to be put on anything ..in fact I'm gonna replace the tips on my wireless earbuds with these too.The size runs a size bigger, normally with skullcandy or JLab I was using the Medium tip, but with these the MS (medium small) were just about the same fit as those. I might actually get the small because my IEMs don't sit flush against my ears and those would most likely fit a little deeper like the cloud foam tips did for me.As for sound ..my 7hz salnotes zero IEM is a neutral balanced tuning, with the foam tips I can tell the highs were slightly lower and some details in certain sibilant areas didn't sound as sparkly as they should given the tuning, the foam seal helped the bass a bit though.Now for the W1. These not only brought out more clarity in the balanced tone, but it upped the low end a bit where it was brought a little bit forward and wasn't lost or masked while retaining it's set tuning, In fact the bass seems present and tight but not boomy (don't expect a punch from the low end here) which is what you want in a neutral balanced set the mids were nice, clear and kept the balance of the intended tuning, the highs also retained sparkle that was originally rolled off with the foam tips. So in the highs I could hear the faint details from before a little more, but it's not overly sharp.Putting them on is a little tricky at first, they're a tight fit but secure well onto the stem, though I probably would make these permanent on the IEM's I put them on, each one would respectively stay on the ones i put them on, as I heard about these loosening if put on stems with wider diameters and then being too loose on smaller diameter driver stems.The soundstage is a bit more open, I can tell more separation between instruments too.Overall, these tips are great, I may purchase more in MS and S for my Zero 2 and my wireless earbuds.

The SpinFit W1 ear tips are designed to enhance comfort, grip, and sound quality for in-ear monitors (IEMs). They feature a ribbed column pattern that improves rigidity while maintaining flexibility, ensuring a secure fit without attracting excessive dust or lint.Compared to other SpinFit models, the W1 offers better isolation and a noticeable increase in soundstage, making music feel more immersive. They also help tighten up bass response while maintaining treble clarity. However, they are slightly more expensive than other ear tips..They are a bit smaller than other SpinFit tips of the same size (compare M to M). I like the material used on these tips much better that the other SpinFit tips.

I was skeptical, especially about their price for one pair. The MS size fit is crazy tight on the 7hz Zero 2. Despite that, once installed, the eartips stay securely on my ears. These ear tips do help with the bass if you feel like your current eartips are leaking sound. Overall, the quality is ok, the installation is a little hard at first, and they function perfectly as a pseudo bass booster.

On some iems these are very comfortable but on others not the best. Sound quality is consistently very good if the seal is good.My biggest problem with these is that the material is a little too flexible and can cause a crinkling sound as the material folds or flexes when I move my head on some iems.They are also quite pricey for a single pair of tips.

These ear tips are a million times better than the ear tips that came with my ear buds. While they may seem a bit expensive they are well worth the money. They fit perfectly in my ears and I believe this is because they have a size “Medium Small” instead of just the normal sizing. They feel super strong and have held up great since I got them. They are a bit thick but if you get the correct size then you won’t have an issue. These are amazing and also improved sound quality in my case quite a bit!

The pair fit my Simgot EM6L great and has a much better seal and music and gaming sounds more pure and immersive.

I love spinfit. But no one has gotten back to me on the website or twitter. On the website it lists the W1 for fokus rex5 but it doesn't fit. Can someone check on the sizes so we know what to purchase for the premium headset?

The biggest concern I had before buying these was the fit. I have several KZ and CCA IEMs and the medium size fits me pretty good. I also use the AirPods Pro with the medium tips which also fit me well. With that in mind I decided to get the MS size because they were in the middle of the 5 sizes available. I had concern these would fit too small but they fit my ears perfectly. I recommend this size if you use Medium sized KZ eartips or AirPod pro tips. They are definitely more “sticky” than my other eartips which provide a slightly better seal. I bought these for extra comfort and they seem to do the job well. Still too early to tell the long term performance but they are a worthwhile upgrade for me, especially for the Prime day sale! Photo is a comparison of KZ medium tips to MS Spinfit tips