SpinFit CP145 L Silicone IEM Eartips for 5–6mm Nozzles

SpinFit CP145 for IEM (size L) are patented silicone replacement eartips designed to deliver a secure seal and long-wearing comfort for earphones with 5–6 mm nozzles.

If your in-ear monitors use balanced-armature (BA) drivers and a narrow sound-port nozzle, the CP145 L is engineered to match those dimensions and restore fit, bass response, and isolation. These eartips use SpinFit's flexible silicone profile to adapt to the ear canal while keeping the driver’s acoustic output consistent. Each pack contains two pairs (four pieces) so you can swap tips between earphones or keep a spare set in your case.

Which earphones will these CP145 L tips fit?

CP145 L eartips were built for IEMs with a 5–6 mm nozzle diameter and a 4.5 mm bore opening. They are especially appropriate for models that use BA drivers and narrow sound ports.

• Compatible with AKG N30 and AKG N40 models.
• Works with 1More E1001 Triple Driver IEMs.
• Designed dimensionally similar to Comply T-500 tips for BA-style earphones.

How do these tips affect sound and isolation?

The CP145 shape emphasizes a stable physical seal that preserves the earphone’s intended acoustics. Properly seated, they can enhance low-frequency clarity and reduce outside noise without altering midrange balance.

• 4.5 mm bore aligns the sound port for direct driver coupling.
• Flexible silicone contours to canal shape to reduce microleaks.
• Maintains driver distance to preserve original tuning and imaging.

Are these comfortable for long listening sessions?

SpinFit’s silicone formulation and tapered geometry are designed to minimize pressure while keeping a secure fit, making them suitable for extended wear. The L size targets users who need a larger seal without excessive insertion depth.

• Soft, supple silicone reduces ear fatigue during long use.
• Size L fits deeper canals while remaining comfortable.
• Two pairs included for rotation and hygiene.

How easy is it to install and maintain these replacement tips?

Swapping SpinFit CP145 tips is straightforward: remove old tips, push the CP145 onto the nozzle until secure, and check the seal. Cleaning is simple—wipe with a damp cloth and avoid solvents.

• Push-on fit grips nozzles sized 5–6 mm firmly.
• Wipe with mild soap solution; air dry fully before reuse.
• Carry the spare pair in your case for quick swaps on the go.

Who is this for: The SpinFit CP145 for IEM (L) is aimed at listeners with BA-equipped in-ear monitors that have narrow 5–6 mm nozzles who want a dependable, comfortable replacement tip. Ideal for audiophiles and professionals using compatible AKG or 1More models, or anyone seeking a Comply T-500-sized silicone alternative for improved fit and preserved sound. The package of two pairs makes it practical for users who rotate tips or keep backups in their carrying case.