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Best Eartips for Budget IEMs: Footsteps in CS2 & Valorant

Canal seal affects bass and positional cues. We compare SpinFit CP145, DUNU S&S, and Sonicfoam SF2 for seal stability, 2-6 kHz treble clarity, and long-session comfort.

A
Andrew T. - Setup Specialist
  • 6 min read
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Stock silicone tips included with budget in-ear monitors (such as Tangzu Wan'er, 7Hz Zero, or Moondrop Chu II) are often a bottleneck in your competitive audio chain. Thin silicone can collapse when you move your jaw or speak on Discord, breaking the acoustic seal and thinning out bass cues. Replacing flimsy stock tips with targeted aftermarket designs can noticeably improve audio without buying new monitors. Aftermarket tips typically cost roughly $10-25 per pack, a fraction of the price of a new IEM upgrade, although the premium SpinFit option can approach the price of the IEM itself. We compared three popular options for tactical shooters: the patented swivel-core SpinFit CP145, the straight-wall wide-bore DUNU S&S, and Sonicfoam SF2 slow-rebound memory foam tips, looking at how bore diameter and material affect footstep clarity, spatial localization, and seal retention in CS2 and Valorant.

Info

Acoustic Canal Coupling & Spatial Awareness in Tactical FPS

Canal seal integrity and nozzle bore geometry strongly influence how sound reaches your ear in competitive tactical shooters. In CS2 and Valorant, footstep transients (roughly 2 kHz to 6 kHz) and low-frequency floor thumps (roughly 60 Hz to 180 Hz) rely on a well-sealed canal. Even minor air leakage thins out bass and weakens low-frequency cues.

Flexible Swivel Core (SpinFit)
Flexes along the ear canal curvature, helping the seal hold during jaw movements and tactical callouts
Straight Cylindrical Wide-Bore (DUNU S&S)
Lets treble pass through unobstructed and tends to open up the soundstage for angle holding
Slow-Rebound Memory Foam (Sonicfoam)
Offers the strongest passive isolation of the three while softening harsh muzzle flash peaks

Why aftermarket eartips often beat stock silicone tips: Stock ear tips shipped with budget IEMs can be thin and slippery, and they often lose their seal when you talk on Discord. Quality aftermarket tips hold their seal better, keeping bass and footstep frequencies consistent.

Four specs that determine gaming performance in IEM eartips:

  • Bore Diameter (Wide vs Narrow) - Wide bores preserve treble energy and tend to sound more open, while narrow bores soften treble and emphasize the low end.
  • Material Grip & Friction - Grippy silicone stays anchored in the canal during sweat-heavy competitive rounds.
  • Nozzle Grip & Core Stability - A tip that fits snugly on the nozzle will not stay behind in your ear canal when you remove the IEM.
  • Acoustic Seal Retention - Swivel cores or expanding foam adapt to natural jaw movements during aggressive callouts.

Four tips for optimizing your IEM eartips in CS2 & Valorant:

  • Test multiple tip sizes for each ear independently; human ear canals are rarely symmetrical
  • Clean silicone eartips regularly with a damp microfiber cloth to remove skin oil buildup and restore grip
  • Compress memory foam tips, insert them, and hold them in place for about 15-20 seconds while they expand
  • Make sure the eartip sits fully on the nozzle, down to the rim, so the sound chamber depth stays as intended

IEM Eartip Comparison: Materials, Bore Geometry & Sound Profiles

  • SpinFit CP145 Patented Silicone Eartips for IEM Best Ergonomics

    Material: Medical-Grade Silicone
    Bore: 4.5 mm Bore with Patented Swivel Core
    Fit: 5.0 mm to 6.0 mm IEM Nozzles
    Profile: Balanced signature with well-preserved treble and flexible bass
    Check price on Amazon

  • DUNU S&S (Stage & Studio) Straight-Wall Silicone Eartips Best Soundstage

    Material: Flexible Grippy Silicone
    Bore: Straight Cylindrical Body with Wide Bore
    Fit: 4.0 mm to 5.5 mm IEM Nozzles (some retailers list up to 6.0 mm)
    Profile: Open treble and a wider perceived soundstage
    Check price on Amazon

  • SONICFOAM SF2 Memory Foam Earbud Tips Maximum Isolation

    Material: Slow-Rebound Hypoallergenic Polyurethane Memory Foam
    Bore: Foam Tip (check the brand size chart for your IEM)
    Fit: 4.4 mm to 5.7 mm Earphone Diameter
    Profile: Warm signature, emphasized bass, softened treble peaks
    Check price on Amazon

* As an Amazon Associate I earn from qualifying purchases.

SpinFit CP145: Swivel Core & Long-Session Comfort

  1. 1

    Patented Swivel Core

    Bends and rotates to follow the ear canal contour, helping the seal survive voice comms.

  2. 2

    Soft Silicone Construction

    Soft medical-grade silicone is comfortable during multi-hour deathmatches.

  3. 3

    4.5 mm Bore for 5-6 mm Nozzles

    Fits wider-nozzle IEMs firmly and preserves treble clarity and bass flexibility.

SpinFit CP145 Pros & Cons

Pros

  • Very comfortable for long sessions, with a soft and flexible core.

  • Helps maintain the seal while talking on team voice comms.

  • Preserves 2-6 kHz treble clarity for footstep cues.

Cons

  • More expensive per pair than budget bulk packs.

  • Can sit deeper in the ear canal than short-profile tips, which not everyone finds comfortable.

Conclusion

The SpinFit CP145 is the top choice for players who experience ear fatigue or a seal that breaks during voice comms. Its swivel core helps keep the seal stable.

DUNU S&S: Straight-Wall Grip & Open Soundstage

  1. 1

    Straight Cylindrical Profile

    A cylindrical body with straight outer and inner walls gives wide contact with the canal and a stable seal.

  2. 2

    Wide-Bore Channel

    Lets sound pass with little obstruction, preserving treble extension and a sense of width.

  3. 3

    Grippy Outer Surface

    Helps the IEM stay in place during rapid head movement or aggressive flick resets.

DUNU S&S Pros & Cons

Pros

  • Tends to widen the perceived soundstage in CS2 and Valorant.

  • Wide-bore design avoids muffling the treble.

  • Grippy exterior helps keep the IEM in place during quick head movements.

Cons

  • Cylindrical shape feels unconventional and demands careful size selection.

  • Grippy surface can pick up lint and dust, so it needs occasional damp wiping.

Conclusion

DUNU S&S delivers the most open soundstage of the three, which helps with locating footsteps across bomb sites.

Sonicfoam SF2: Slow-Rebound Memory Foam & Strong Isolation

  1. 1

    Heat-Activated Memory Foam

    Expands slowly to fill the ear canal, providing strong passive noise isolation.

  2. 2

    Bulk Pack Value

    Sold in multi-pair packs, which helps because foam tips need regular replacement.

  3. 3

    Warm Sound Signature

    Softens harsh gunshot peaks and emphasizes low-frequency footstep thumps.

Sonicfoam SF2 Pros & Cons

Pros

  • Strong passive isolation that helps block mechanical keyboards and room noise.

  • Softens treble peaks, which can reduce ear fatigue during gunfire bursts.

  • Warm, bass-forward sound that emphasizes footsteps on heavy surfaces.

Cons

  • Rolls off upper treble, reducing micro-detail.

  • Foam wears out quickly (the brand states up to about 4 weeks per pair) and collects earwax faster than silicone.

Conclusion

Sonicfoam SF2 provides the strongest passive noise isolation, helping block mechanical keyboard clatter and PC fan noise.

Verdict

Upgrading stock IEM tips can restore seal stability and footstep clarity DUNU S&S

DUNU S&S is our top recommendation for competitive CS2 and Valorant players who want the most open, spacious sound. Its straight-wall, wide-bore design preserves treble energy and widens the soundstage, which helps with locating footsteps across bomb sites.

How the other contenders compare:

  • SpinFit CP145 provides the best ergonomics. Its soft silicone and swivel core help maintain the seal during long matches and team communication.

  • Sonicfoam SF2 delivers the strongest passive isolation. If your gaming space has background noise from PC fans or roommates, its expanding memory foam helps block out ambient distractions.

Frequently Asked Questions

  • Stock silicone tips bundled with budget IEMs are often thin and slippery, so they can collapse or shift under slight ear canal pressure. When the seal is compromised, bass drops off, footsteps feel thinner, and directional cues become less clear.

  • Narrow-bore tips act as an acoustic filter, softening treble and emphasizing low frequencies. Wide-bore tips (like DUNU S&S) let sound leave the nozzle with less obstruction, preserving treble energy and a more open sound.

  • Not necessarily. Footstep cues sit mostly in the 2-6 kHz range, while foam mainly rolls off the highest treble (above roughly 8 kHz). That reduces ear fatigue during long sessions, though competitive players who want the crispest transients often prefer silicone.

  • Always test multiple sizes: an eartip should slide in smoothly with light pressure and stay airtight when you gently tug the IEM cable. If the seal breaks when you open your mouth, try a larger size or a straight-wall profile like the DUNU S&S.

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