We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 6 min read · Independent comparison
If you want replacement pads tailor-made for the Sony WH-CH720N with a memory-foam-and-protein-leather build, a three-year manufacturer warranty and a straightforward snap-in fit, choose Krone Kalpasmos Replacement Ear Pads; if you need a full earpad and headband refresh kit for JBL T450 BT, T500 BT, Tune 600, 510BT or JR300 headphones, choose sonecesiya Earpads Cushions.
• Krone Kalpasmos — biggest strength: purpose-built for one headphone family, the Sony WH-CH720N, with protein leather over memory foam, a noise-isolation-focused seal, tool-free installation and a three-year manufacturer warranty.
• Krone Kalpasmos — biggest trade-off: it only fits the Sony WH-CH720N line and it is a pads-only purchase, so if your cushions are fine but your headband padding is worn, this kit does not address that.
• sonecesiya — biggest strength: it is a two-part kit — earpads plus a headband pad — for the JBL T450 BT, T500 BT, Tune 600, 510BT and JR300, molded 1:1 to the originals so the holes line up accurately.
• sonecesiya — biggest trade-off: it is locked to those JBL models, comes in pink only, and carries a one-year warranty versus Krone Kalpasmos's three.
• Who each pick is for: Krone Kalpasmos for Sony WH-CH720N owners who want a like-for-like comfort and seal refresh; sonecesiya for JBL T450/T500/Tune 600/510BT/JR300 owners who want to restore both the ear cushions and the headband in one go.
This is a single-purpose product, and that is its whole appeal. The pads are cut specifically for the Sony WH-CH720N, so there is no guessing about whether they will line up with the earcup ring — the fit is described as tailor-made rather than "universal." If you own that headphone, you are the exact buyer this was designed around.
Installation is the part most people worry about, and it is deliberately simple: align and snap, no tools, no adhesive. The package includes printed instructions, which is a small thing but genuinely useful if you have never swapped pads before. On durability, the pads use reinforced stitching and an adhesive layer, and Krone Kalpasmos backs them with a three-year manufacturer warranty. The brand also notes the pads are handmade, so expect millimetre-level variation between units — normal for this category and not something that affects fit.
Who should skip it: anyone who does not own a Sony WH-CH720N. There is no cross-compatibility here, and no headband pad in the box.
sonecesiya Earpads Cushions: Who It's For
sonecesiya solves a different problem. It targets the JBL T450 BT, T500 BT, Tune 600, 510BT and JR300, and — crucially — the package contains both earpads and a headband pad. That combination is the reason to pick this one. Headband padding is usually the first thing to go flat on a well-used JBL, and most replacement kits ignore it entirely.
The construction is leather over memory foam, the same broad recipe as the Krone Kalpasmos set, with the emphasis on the foam conforming to the shape of your ear to create a seal. A better seal means less sound leakage and more bass response — again, basic physics rather than marketing. The covers are molded 1:1 from the originals, so the driver holes are accurate and the pads sit still instead of sliding around.
Installation is snap-on: line the pad up with the earcup, press until it clicks. No tools, no glue. The brand also highlights sweat protection — the pads are meant to keep the headphone dry during gym use and shield it from moisture-driven breakdown, which is a realistic concern for the 510BT and T450 BT crowd.
Who should skip it: Sony WH-CH720N owners, and anyone who wants a colour other than pink.
Side-by-Side: Which Should You Choose?
• Own a Sony WH-CH720N → Krone Kalpasmos Replacement Ear Pads. It is built for that headphone and nothing else.
• Own a JBL T450 BT, T500 BT, Tune 600, 510BT or JR300 → sonecesiya Earpads Cushions. The model list is the deciding factor.
• Need a headband pad as well as earcups → sonecesiya. It is the only one of the two that includes headband padding.
• Want the longest stated warranty → Krone Kalpasmos. Three years versus one.
• Want a colour that blends with a black headphone → Krone Kalpasmos. The sonecesiya kit is pink.
• Prioritise noise isolation and bass seal → Krone Kalpasmos. Its pitch centres on preserving the Sony's noise-cancelling performance through a tight seal.
• Use your headphones at the gym → either, but read the details. Both lean on sweat resistance; sonecesiya frames it around protecting the headphone from moisture damage.
• Care most about easy, beginner-friendly installation → a tie. Both are tool-free snap-on designs with no adhesive.
In my opinion, the right pick is entirely decided by which headphones you own — and if you own a Sony WH-CH720N, I would buy the Krone Kalpasmos Replacement Ear Pads. The three-year warranty, the single-model precision fit and the noise-isolation-focused design make it the more straightforward choice for that headphone. If you own one of the listed JBL models, I would buy the sonecesiya Earpads Cushions instead, because getting a matching headband pad in the same box is worth more than any spec advantage on paper. Check the current price on Amazon for whichever one matches your model before you commit.
FAQ
No. They are made for the Sony WH-CH720N only. If you have a JBL T450 BT, T500 BT, Tune 600, 510BT or JR300, the sonecesiya kit is the one that fits.
Yes. The package includes both the earpads and a headband pad, which is the main practical difference between the two products in this comparison.
Krone Kalpasmos states its pads can be used for 180 days or more and suggests changing headphone pads roughly every seven to eight months for hygiene. Treat that as a maintenance interval rather than a hard limit.
Krone Kalpasmos lists a three-year manufacturer warranty; sonecesiya lists one year. Both cover a straightforward snap-on, tool-free installation.
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