How to Install Porta Pro Oversized Cushions

By Koss Stereophones | Published: 2026-10-21

Category: How-to Guides

Learn how to swap the standard ear pads on your Koss Porta Pro for the official Oversized Cushions. Follow these simple steps for a comfortable, secure fit.

Quick Answer

You can install Porta Pro Oversized Cushions in under five minutes by stretching the foam over the stock earpiece rim. No tools or adhesive are needed.

Why Upgrade to Oversized Cushions?

The standard Porta Pro ear pads are thin and can feel tight during long listening sessions. The Oversized Cushions use softer, breathable foam that distributes pressure over a larger area, making extended wear noticeably more comfortable.

Because they are thicker, the oversized pads also push the drivers slightly farther from your ears. This can subtly change the soundstage, giving a slightly more open feel without losing the signature Porta Pro bass.

What You Need Before You Start

You only need the new Oversized Cushions and your Porta Pro headphones. The cushions come in a wide range of colors, so you can customize the look of your headset while improving comfort.

No special tools, glue, or clips are required. The cushions are designed to stretch over the existing earpiece frame and stay in place with friction alone.

Step-by-Step Installation Guide

Remove the old ear pad: Grip the edge of the existing cushion and gently pull it away from the earpiece. It should slide off without resistance. If it feels stuck, work your fingers around the rim to loosen it. Do not use sharp tools — they can scratch the plastic housing.
Align the new cushion: Hold the Oversized Cushion so the open side faces the earpiece. The foam has a slight curve that matches the shape of the Porta Pro driver housing. Line up the thicker part of the cushion with the bottom of the earpiece. Installing it upside down will leave a gap at the bottom and cause the cushion to slip off.
Stretch the cushion over the rim: Push one edge of the cushion over the plastic rim, then work your thumbs around the perimeter, stretching the foam evenly. The cushion should snap into place with a snug fit all around. If the cushion feels loose in one spot, it may not be fully seated. Reposition it rather than forcing it.
Check the fit and repeat for the other side: Press the cushion gently to confirm it is secure. Rotate the earpiece to make sure the cushion does not shift. Then repeat the process on the other earpiece. Both cushions should sit symmetrically. An uneven fit can affect comfort and sound balance.

What You'll Need

Porta Pro® Oversized Cushions: Includes one set of Oversized Koss Porta Pro Ear Cushions, designed specifically for Porta Pro and KPH40 Utility (may also fit KSC35 and KSC75). This is an official Koss accessory, so it matches the earpiece shape exactly and stays secure without modification.
Porta Pro® Oversized Cushions