Question 1

How do I know if the SpinFit CP145 will fit my specific IEM model?**

Accepted Answer

These tips are designed for nozzle diameters between 5mm and 6mm. Most standard IEMs in this range will work, but the shape of your nozzle also matters. For instance, many Moondrop and 7Hz models fit perfectly, while users with wider or tapered nozzles report looser grips. A good rule: measure your nozzle with a caliper before buying. If your IEM has a wider base that tapers, consider the SpinFit CP100+ for a safer fit. Reddit users frequently mention checking “nozzle diameter + nozzle shape” together, not just the diameter.

Question 2

The reviews say these are super comfortable, but do they stay in place during exercise or active use?**

Accepted Answer

The CP145s are praised for comfort during stationary listening (like at a desk or lying down) thanks to their soft, breathable silicone. However, they are not designed for heavy movement. TikTok and YouTube reviewers consistently note that while they stay put for light walking, they can dislodge during running or gym workouts due to the shallow fit. For active use, foam tips or SpinFit’s CP155 (with a deeper insertion) are better options.

Question 3

Some people mention the silicone separating from the stem. Is this a common defect?**

Accepted Answer

It happens, but it’s not widespread. The patented construction bonds a soft outer silicone to a firmer inner core. In rare cases (especially with frequent removal or improper cleaning), the layers can separate after a few weeks of use. Most buyers report months of daily use with no issues. To maximize lifespan, gently twist when removing, avoid pulling by the tip, and store them off your IEMs when not in use. SpinFit’s warranty typically covers manufacturing defects – contact their support if you encounter separation early on.

Question 4

How do these compare to Comply foam tips or Final Audio Type E in terms of sound and isolation?**

Accepted Answer

Here’s the breakdown: The CP145 offers the best comfort and a noticeable bass boost, but the least noise isolation – you’ll hear your surroundings. Comply foam tips provide the best isolation and are cheaper per pack, but they are disposable (wear out in weeks). Final Audio Type E tips offer a middle ground: good comfort similar to SpinFit, better isolation, and more durable at a similar price. If you’re after pure isolation for commuting, go Comply. If comfort is king for home listening, SpinFit wins. For a balance of both, try Final Audio Type E.

Question 5

Is the price worth it for just two pairs of silicone tips? What alternative should I look at?**

Accepted Answer

The price is about average for a premium silicone tip (around $12–$15). You’re paying for the patented medical-grade silicone and the ergonomic shape that reduces ear fatigue – something cheaper tips often lack. That said, if you have a standard IEM and just want affordable comfort, check out AZLA SednaEarfit or the KBear 07 silicone tips for a similar feel at half the price. The SpinFit CP145 is best for those who prioritize long-wearing comfort over budget, or who own IEMs with tricky-to-fit nozzles (like the Moondrop Aria) and need a known-safe upgrade.

SpinFit CP145 for IEM - M - Patented Silicone Eartips for Replacement, Secure Fit and Supreme Comfort (2 Pairs) (for Nozzle Diameter from 5-6mm)

Analysis Details

Was this analysis helpful?

What are you buying this for?

Have questions about this product? Ask the community.