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If you want a cheap, universal foam refresh for any 50mm on-ear headphone you already own, choose Top Stage 3; if you need a properly fitted, long-lasting cushion set for a specific Sony WH-CH series headphone, choose Krone Kalpasmos Replacement Earpads.
• Top Stage 3 — biggest strength: a 3-pair pack of 2-inch (50mm) foam pads at 3mm thick, so you can re-stock and rotate rather than buy one replacement at a time.
• Top Stage 3 — biggest trade-off: it is a plain foam cover, not a full earcup cushion, and it only fits headphones that actually measure 2 inches across — the brand tells you to measure before buying.
• Krone Kalpasmos Replacement Earpads — biggest strength: a model-specific fit for Sony WH-CH520N (and the WH-CH500N / WH-CH510N family) in protein leather over memory foam, with tool-free installation.
• Krone Kalpasmos Replacement Earpads — biggest trade-off: it is locked to that Sony WH-CH family, so it is useless on anything else, and it comes as a single set rather than a multi-pack.
• Who Top Stage 3 is for: tinkerers, owners of generic 50mm on-ears, and anyone who wants a bulk supply of simple foam covers.
• Who Krone Kalpasmos Replacement Earpads is for: Sony WH-CH500N / WH-CH510N / WH-CH520N owners whose original cushions have gone flat.
Top Stage 3 is the simplest thing in this comparison: a bag of foam. You get three pairs of 2-inch (50mm) pads, 3mm thick, in black, with a memory-foam enclosure material. There is no frame, no mounting ring, no leather wrap. It is a cover that sits over an existing earpad or driver housing.
That design tells you a lot about who should buy it. If your headphone has a 2-inch diameter cup and the padding has compressed into a sad, flat disc, this is a low-effort way to bring back some softness and a bit of seal. Because it is plain foam, it also lets sound through in a fairly neutral way — the maker's own claim is that it enhances the fidelity of music, and in practice foam covers mostly act as a thin interface between your ear and the driver rather than reshaping the tuning.
The obvious catch is fit. Top Stage explicitly says these are for 2-inch diameter headphones ONLY, and asks you to measure before buying. A millimeter off and they will either slip or bunch. They also wear out faster than leather-wrapped cushions — foam simply does. The 30-day warranty reflects that expectation.
So: buy these if you own generic 50mm on-ears, backup pairs, or kids' headphones and you want a stack of spares. Skip them if you own a named headphone with a custom mounting system, because a loose foam disc is not a real replacement part for that.
Krone Kalpasmos takes the opposite approach: one headphone family, done properly. These are replacement ear pads built for the Sony WH-CH520N, and they are also listed as compatible with the WH-CH500N and WH-CH510N. If you have been searching for WH CH520N cushions, WH-CH510N ear pads, or Sony CH520 ear covers, this is the part those searches are pointing at.
The materials are the story. Soft protein leather over memory foam, which is the standard recipe for comfort plus passive noise isolation — the leather forms a seal against your head, the foam presses back evenly, and more of the outside world stays outside. Krone Kalpasmos says the pads are engineered to maintain original sound quality and improve noise isolation, and that is a realistic claim for a well-sealed cushion on a closed-back headphone.
Installation is tool-free and the package includes installation guidance, which matters because stretching a new cushion over a Sony cup is the step people usually get wrong. On durability, the maker states the pads are tested for wear and compression and can last three years or more, while also recommending you swap cushions every 7 to 8 months for hygiene reasons. Those two statements are not contradictory — it is about how hard you use them and how much you care about cleanliness.
Who should buy these? Sony WH-CH500N / WH-CH510N / WH-CH520N owners whose pads have cracked, flattened, or started flaking. Who should skip them? Anyone with a different headphone. There is no universal fit here, and no second set in the box.
• Best for a specific Sony WH-CH headphone → Krone Kalpasmos Replacement Earpads. Purpose-built fit beats a generic disc every time.
• Best for any 50mm / 2-inch on-ear → Top Stage 3. Measure your cup first; if it is 2 inches, these drop on.
• Best for noise isolation → Krone Kalpasmos Replacement Earpads. Protein leather plus memory foam seals; bare foam does not.
• Best for sound preservation → Krone Kalpasmos Replacement Earpads, in my opinion, because a proper sealing cushion keeps the tuning close to what the headphone was designed for.
• Best for spares and rotation → Top Stage 3. Three pairs in one pack means you are never stuck waiting on a replacement.
• Best for low-effort install → Krone Kalpasmos Replacement Earpads. Tool-free with instructions in the box.
• Best for long-term wear → Krone Kalpasmos Replacement Earpads. The maker rates the material for years, not months.
• Best for hygiene swaps → Top Stage 3, if you want to simply toss a thin foam pair and move on.
If I owned a Sony WH-CH520N, WH-CH510N, or WH-CH500N, I would buy the Krone Kalpasmos Replacement Earpads. The fit is specific, the protein leather and memory foam give real comfort and isolation, and installation needs no tools. Top Stage 3 is a fine, honest product, but it is a bulk foam cover for 2-inch cups — not a fitted part. I would only pick it if my headphone is a generic 50mm model and I want spares on hand. Check the current price on Amazon before you commit, since that is the one thing that could flip the decision.
FAQ
Yes. They are designed specifically for the Sony WH-CH520N and are also listed as compatible with the WH-CH500N and WH-CH510N. They are not a universal pad, so check your model before ordering.
Only if your earcup measures 2 inches (50mm) in diameter. The brand states this clearly and asks buyers to measure first. If your cup is a different size, these will not seat properly.
Krone Kalpasmos says their pads preserve original sound clarity and improve noise isolation, which is typical of a sealing leather-and-foam cushion. Top Stage 3 pads are thin open foam covers, so expect a subtle change rather than a sealed, isolated sound.
Krone Kalpasmos recommends changing cushions every 7 to 8 months for hygiene, while noting the pads themselves can last three years or more depending on use. Foam covers like Top Stage 3 tend to flatten sooner and are easiest to replace as a multi-pack.
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