Strauss & Wagner SonicSil 4.0mm TWS Foam Eartips

Fit That Changes Everything

The SonicSil are designed for slimmer nozzle sizes on true wireless earbuds and wired in-ear headphones alike. Built from slow-rebound memory foam, they gently adapt to your ear canal to improve isolation, stability, and overall sound clarity. Whether you’re replacing worn tips or upgrading from standard silicone, the SonicSil are a simple, and effective way to improve your experience.

Slow-Rebound Memory Foam Comfort

SonicSil foam compresses easily and expands gradually once inserted, forming a personalized seal. This helps reduce pressure points while staying securely in place, which is ideal for long listening sessions, commuting, or workouts. 

Enhanced Isolation, Cleaner Sound

A proper seal isn’t just about comfort since it directly affects sound. By limiting outside noise and minimizing sound leakage, these foam eartips help tighten bass response, improve vocal presence, and maintain consistent audio performance at lower volumes.

Lightweight, Discreet, and Durable

Finished in matte black, SonicSil eartips blend seamlessly with most earbuds. The material is engineered to retain its shape through repeated compression, offering reliable performance day after day.

Protective Storage Case Included

Comes with a compact storage case designed to keep your ear tips clean, organized, and protected when not in use. Ideal for travel or everyday carry, the case helps prevent dust buildup, deformation, or loss inside bags and pockets.

Included in the Package

• 1 pair Small
• 1 pair Medium
• 1 pair Large
• Storage case

Sizing

Compatibility

Designed for in-ear headphones using 4-5 mm nozzle diameters. Compatible with a wide range of IEMs and true wireless earbuds.

Wired Compatibility

• Strauss & Wagner: EM205, EM8C, SI201
• 64 Audio: All models (tested with U4s; will fit all other models)
• Beyerdynamic: DT IE series
• Campfire Audio: All models (tested with Bonneville and Cascara; will fit other models)
• Empire Ears: ODIN MKII
• Final Audio: E series, A series (tested with E5000 and A4000; will fit all other models)
• FlipEars: Aisha Electri, Arion
• IKKO: OH5
• JH Audio: Sheena Universal
• Letsheour: S08, EJ09
• Meze: Alba
• Noble Audio: All models (tested with Onyx, Kronos, and XM-1; will fit all other models)
• Queen of Audio: Gimlet
• Sennheiser: IE series (tested with IE 600 series; will fit all other models)
• Sivga: Nightingale, Que, Que UTG, SM series
• VisionEars: EXT MKII

TWS Compatibility

• ag: TWS09R
• Audio-Technica: ATH-CKS5TW
• Beyerdynamic: AMIRON 300
• Bowers & Wilkins: Pi8, Pi6
• Denon: PerL
• Final Audio: EVATW06, ZE2000, ZE3000
• Noble Audio: Rex5, Amadeus
• Sennheiser: MOMENTUM 4, MOMENTUM Sport
• Sony: WF-1000XM5, WF-510
• Yamaha: TW-E7B, TW-ES5A