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Six black foam ear cushions on a plain surface

Koss

Koss PORT CUSH Replacement Cushions 6 per pack

SKU CH-PYQA-8ZF72

Six replacement ear cushions compatible with Koss PortaPro, KSC75, KSC11, KSC17, KTXPro1 and other models

  • TypeBehind the Neck
  • Weight0.05
  • FeaturesFits Koss KSC11, KSC17, KSC75, PortaPro, and KTXPro1 headpho
  • Package ContentsKOSS PORT CUSH Replace Cushion
  • Fits KSC11, KSC17, KSC75, PortaPro and KTXPro1 headphones
  • Open, hear-through design keeps you aware of surroundings
  • Lightweight at 0.05 weight units for comfortable wear
  • Six cushions per pack provide multiple replacements
  • Compatible with Koss Porta Pro, Sporta Pro and KTX PRO1 models

Compatible headphone models

These replacement cushions fit Koss Porta Pro, Sporta Pro, KSC-10, KTX PRO1, KTX8, PTX6, KSC75 and KSC-11 headphones. The pack contains six cushions so both earpieces can be refreshed multiple times. They restore the original open, hear-through design without altering the sound signature.

Lightweight construction

Each cushion weighs only 0.05 grams, adding virtually no mass to the headband. The low weight keeps clamping force unchanged and avoids extra pressure during long sessions. No power draw or active components are involved, so thermals and noise are not a factor.

Pack contents and fit

The box includes six KOSS PORT CUSH cushions and no additional tools or adhesives. Installation is a simple press-on action that secures each cushion to the driver housing. The multi-model compatibility means one pack serves several Koss headphone lines.

Highlights

  • Fits KSC11, KSC17, KSC75, PortaPro and KTXPro1 headphones
  • Open, hear-through design keeps you aware of surroundings
  • Lightweight at 0.05 weight units for comfortable wear
  • Six cushions per pack provide multiple replacements
  • Compatible with Koss Porta Pro, Sporta Pro and KTX PRO1 models

Specifications

BrandKOSS
SeriesKoss Portable Replacement Cushions
ModelPORT CUSH
TypeBehind the Neck
Weight0.05
FeaturesFits Koss KSC11, KSC17, KSC75, PortaPro, and KTXPro1 headphones
Open, hear-through design
6 per pack
Package ContentsKOSS PORT CUSH Replace Cushion
Shipping weight0.23 kg
Package size178 × 152 × 25 mm

Questions about this item

How do I fit these cushions onto my PortaPro headphones, and which step causes the most trouble?

Stretch each cushion over the driver housing until the inner lip seats in the groove; the step people miss is fully seating the lip all the way round, leaving a loose edge.

When will these foam cushions need replacing again?

Replace them when the foam loses spring, shows permanent compression, or the surface starts to flake — typically after months of daily wear.

What is the first sign these cushions are failing during a long listening session?

The open, hear-through design means bass drops away first as the foam compresses and the seal against your ear breaks down.

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