A small note: I am going to compare the various eartips using the “L” size as reference, so you will need adjust that to the size you are interested in as the purpose is to give you a frame for comparison, not to describe every possible size and combination.

On the whole, the SpinFit CP100 does improve the bass presentation slightly, so it’s something you should consider if you needed that little more bass extension. SpinFit CP100+ (Preview) This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded. The patented aspect of the SpinFit ear tips is the concave 3D axis towards the tip. This allows the ear tip to flex and bend as it pushes into your ear canal. Image credit: SpinFit The SpinFit CP360 are the first tips SpinFit developed specifically for “true wireless” earphones: they’re much shorter than the others because they need to fit in the cases, which often offer very little space for eartips. This means they can’t count on the depth of the insertion to give you isolation and have instead to rely on width: the ear canal is larger at the entrance and so these eartips need to be wider to seal it. In fact these are among the few SpinFit models to offer an XL size (on top of L, M, S and SS) and that’s because of this. The L size is 13 mm in width and 8.5 mm in height, while the XL is even larger at 14 mm wide and 8.5 mm high. They are basically shorter CP100! That’s also true when you look at their shape, which is similar but more compact. The inner diameter is 3.6 mm. Optimal seal– Consistent optimal seal even for headphones with an awkward insertion angle, allowing increased noise isolation.As for sound, my impression is that they are quite neutral and I can’t hear significant differences compared to other tips like the CP100. This is actually desirable, so kudos to SpinFit! From the naked eye, they appear identical to the CP100 except the colour. They also feel similar in my ears. The audio quality is also exhibits similar characteristics, although I had an impression that the CP100+ produces slightly clearer upper frequencies like cymbals. Given the CP100 has been on sale for so many years, it’s good to get an upgrade with better silicone materials. SpinFit CP360

It’s the groove in the inner bore that makes the difference: it grips the lip of the nozzle much better than the usual smooth eartips and this provides better comfort, as the tip is more stable, while also providing a more uniform sound quality across earphones: the distance between the sound port and the end of the eartips is constant, so you get the optimal distance that SpinFit found. Speaking of sound, I find the CP500 to be neutral as they don’t modify the sound significantly – for better or for worse. The basic idea underlying every SpinFit eartip model is the following: traditional eartips have a straight solid core at their centre which stays so independently of the actual shape of the ear, but it would be better if the core could bend and follow the curves of the ear canal. This is what happens with the SpinFit tips: there is a point in which the silicone is thinner and therefore softer and it’s shaped like a doughnut, so that it can bend and provide better comfort. Sound-wise, there is better bass performance than the Comply Foam while the upper treble remains clear. Sennheiser Momentum True Wireless 2 with SpinFit CP360 That preamble aside, the CP-500 has a soft flange along with a similarly soft bore. The flange also has a somewhat oily texture to it, resulting in a fit that’s not the most secure and requires a bit of a deeper insertion. It’s a very comfortable eartip but isolation is worse than the CP-100/145/360. This is an eartip I’d recommend if you’re someone who’s into “tip-rolling” (as in, experimenting with various eartips). The CP-500 provides interesting results with many IEMs.The CP240 has a wide bore and fits comfortably on larger nozzles, but it also comes with a selection of adapters that allow it to fit snugly on smaller nozzles as well. CP360 and CP1025 Where foam tips are concerned, however, the True Fidelity tips provided with 64 Audio models as well as the Marshmallow tips by Campfire Audio were found to be most comfortable. Interestingly, the SpinFit single-flange tip was more comfortable than MandarinE’s Symbio W hybrid tip (an ear tip with a thin layer of silicone coating an inner thermoplastic memory-foam core). The SpinFit CP145 are much like the CP100, but they have a smaller top so they go better inside the ear. The difference is not dramatic in terms of size, but the fit is quite different. The general shape is again ogival, with a height of of 10.1 mm and a with of 13.5 mm. With an inner diameter of 4.5 mm, the CP145 can fit earphones with nozzles up to 5.5/6 mm in diameter: that means that even IEMs with larger soundports, like the Tin HiFi P2, Shanling ME500 Platinum, Fearless Audio S10 Genie or Moondrop A8 will fit correctly, though the silicone will stretch a bit. There are just three sizes: S, M and L. I did a comparison on the Sennheiser IE300 with the CP100+ and CP360. My ears detected the following characteristics: The SpinFit CP1025 were made to fit the Apple AirPods Pro thanks to an included adapter. The adapter is in fact an add-on that you can ignore completely if you use other earphones, and the CP1025 work just as well. In fact I think SpinFit should market this model not just for AirPods Pro as it – surprisingly – is also the one that I found to work best with other TWS as well, even more than the CP360. Update: SpinFit has actually done so, making the CP1025 available without the adapter and as more general TWS eartips. The CP1025 have an inner diameter of 3.6 mm and an outer diameter of 12 mm, with a height of 6.7 mm. There are four sizes available: L, ML, M and S.

In this round-up, we shall explore how well this mechanism works across a variety of IEMs. Models to be evaluated: Spinfit CP-100, CP-100+, CP-145, CP-145 (medical-grade silicone), CP-240, CP-360, CP-500, and the CP-800. The only two in-production models that I don’t have with me are the CP-155 (I don’t have a large-nozzle IEM at the moment) and the Airpod-specific CP-1025 (I don’t have an Airpod). With that out of the way, let’s head right in. Let’s look at the different SpinFit models, and compare how they fit on a selection of IEMs. Note that the sizing within each model (Small, Medium, Large) only affects the width of the flange and how that fits your ear, and does not affect the size of the bore or how well they will fit on different IEMs. CP100/CP100+These might be a good option for people who have issues with the earbuds making parts of their ears sore

A set of large spinfit's have completely turned this experience around, visceral bass feels improved a bit and they're a tad brighter with disappear-in-your-ears comfort. As they get the deepest inside the ears, the CP155 are also the ones I’ve found myself the least comfortable with on the first try. It takes around five minutes for the silicone to warm up and for my ears to adapt, but then it’s almost as if I wasn’t wearing them at all. Due to their shape they offer an almost perfect seal, so if the earphones you’re wearing provide any isolation at all you probably won’t hear a thing of what’s around you without needing active noise cancellation.While the SpinFit silicone tips do not provide the most bass impact or authority, they offer a higher level of refinement compared to the Symbio W, Shure Olive & Final Audio E-tips. The Symbio W hybrid tips offer the most contrast here with a more impactful bass and energetic treble. However, the SpinFit tips really master the treble with detail and control that the other silicone tips do not possess. The midrange of the SpinFit tips does sway towards the leaner side of the spectrum with more defined transients. Compared to some of the better foam tips (True Fidelity & Campfire Audio’s Marshmallows), the SpinFit’s silicones are more neutral-orientated at the expense of the more rounded and softer impact that the former tips render. Treble Eartips do make a difference in our listening experience. They may not always have an influence on sound, but they do change the way you wear your earphones and this makes all the difference between listening to music while being comfortable and doing so while swearing against the pain in your ears. The SpinFit line-up is quite complete and gives you a lot of choice to get the eartips that better suit your needs, from very deep insertion to a very shallow one. All of them offer a great level of comfort, thanks to the soft silicone and to the incredibly clever design SpinFit came up with. SpinFit eartips are a game changer and can completely change (in a very positive way) the way you experience your favourite earphones.