We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 6 min read · Independent comparison
If you want to restore a pair of aging Bose QuietComfort or SoundTrue headphones and keep their active noise cancelling working like new, choose Krone Kalpasmos Professional Replacement Bose; if you need to protect a child's hearing from loud environments like fireworks, concerts or monster truck shows, choose Dr.meter EM200.
• Krone Kalpasmos biggest strength: A direct-fit replacement ear pad set for a long list of Bose models, built from protein leather and high-density memory foam that's designed to preserve the original ANC and sound.
• Krone Kalpasmos biggest trade-off: It only makes sense if you already own compatible Bose headphones — it does nothing on its own.
• Dr.meter EM200 biggest strength: Certified hearing protection with a 32dB SNR / 26dB NRR rating, a foldable frame and a cute cat-ear design kids actually want to wear.
• Dr.meter EM200 biggest trade-off: It's a passive ear defender, not a listening device — it reduces noise but doesn't play audio or cancel sound electronically.
• Pick Krone Kalpasmos if you're reviving worn-out Bose pads. Pick Dr.meter EM200 if you're shielding a child's ears at loud events.
This is a maintenance product, not a gadget. The Krone Kalpasmos set is a pair of replacement ear cushions made from protein leather over a high-density memory foam core, sized at roughly 3.82 x 3.07 x 0.75 inches and weighing about 20 grams. The pitch is straightforward: your Bose headphones still work, but the pads are flaking, flattened or greasy, and you'd rather refresh them than replace the whole headphone. The leather is treated to resist sweat, oil and cosmetics, and the brand states it's anti-scratch and built to hold up for 12 months or more.
The compatibility list is the real story here. It covers QuietComfort 2, QC15, QC25, QC35 (Series I and II), AE2, AE2i, AE2w, SoundTrue Around-Ear and SoundLink Around-Ear. That's a wide net across roughly a decade of Bose's most popular around-ear models, which means a lot of people with a drawer-bound QC25 or a well-loved QC35 II can put them back into rotation. Krone Kalpasmos specifically claims the pads are tested across multiple Bose models to restore sound quality and maintain the noise cancelling performance — worth noting, because a badly fitted pad is exactly what kills ANC effectiveness.
Installation is pitched as a few-minute job with the necessary tools and replacement parts included, plus a tutorial. If you've never swapped pads before, budget a little patience and watch the guide. The brand also suggests changing ear cushions every 7 to 8 months for hygiene reasons, which is a fair rule of thumb for something sitting against your skin and hair daily. It ships in blue.
Who should buy it: Anyone with one of the listed Bose models whose pads are worn, cracked or uncomfortable. Who should skip it: Anyone who doesn't own a compatible Bose headphone, or who wants a new headphone rather than a repair.
The Dr.meter EM200 is a completely different animal. It's a passive hearing protector for kids, styled with cat ears and shipped with two stickers so a child can personalize it. The shell is ABS with PU leather and memory foam cushions, and Dr.meter says the ABS outer structure holds its shape while spreading pressure evenly to avoid pinching or red marks — the detail that decides whether a kid keeps them on for a two-hour event or rips them off in ten minutes.
The numbers matter most. It's rated SNR 32dB and NRR 26dB, with triple-layer sound-dampening foam inside the ABS shells. Dr.meter is refreshingly honest about the limits: it reduces noise by that margin but does not block sound completely. That's a feature, not a flaw — your child can still hear you say their name while the worst of a monster truck rally or a fireworks finale gets shaved down. Dr.meter also cites ANSI S3.19-1974 and CE EN 352-1 certification for the hearing protection claim.
The headband adjusts to fit toddlers, children, teenagers and even adults, so it's less of a one-season purchase than it looks. It folds down to palm size for school bags, backpacks and suitcases. Dr.meter positions it for school study, air shows, fireworks, concerts and theme parks, and flags it for noise-sensitive kids and autism sensory use. One practical tip from the brand: if the fit runs tight, stretch it over a size 3 soccer ball for four hours.
Who should buy it: Parents of noise-sensitive children, families who hit loud events regularly, or anyone buying a sensory aid for a child who struggles with crowds and volume. Who should skip it: Anyone expecting music playback or electronic noise cancellation — this is protection, not audio.
• Best for reviving existing headphones → Krone Kalpasmos Professional Replacement Bose.
• Best for blocking loud environments → Dr.meter EM200, with its SNR 32dB / NRR 26dB rating.
• Best for everyday comfort over long sessions → Both use memory foam and PU/protein leather, but the Krone pads are shaped to your existing Bose headband, while the EM200 spreads pressure across a dedicated adjustable frame.
• Best for kids → Dr.meter EM200 — cat ears, stickers, foldable, adjustable from toddler to adult.
• Best for adults with Bose gear → Krone Kalpasmos, full stop.
• Best for portability → Dr.meter EM200 folds to palm size; the Krone pads just sit in your headphones.
• Best for ANC preservation → Krone Kalpasmos, which is designed specifically to keep Bose noise cancelling intact.
• Best for hygiene replacement cycles → Krone Kalpasmos, since cushions are consumables the brand suggests swapping every 7 to 8 months.
These two barely compete — they solve different problems. If I had to pick one, I'd take the Dr.meter EM200 for the simple reason that hearing protection for a child is a need with no substitute, while worn ear pads are an inconvenience you can live with a little longer. In my opinion, the EM200's certification, 32dB SNR rating, wide size range and foldable design make it the more complete product for its job. But if you own a QC35 II or an AE2 sitting unused because the pads disintegrated, the Krone Kalpasmos set is the cheaper path back to the sound you already paid for — and it keeps the ANC working, which is the whole point of those headphones. Buy the one that matches the problem in front of you. Check the current price on Amazon before deciding.
FAQ
Yes. The compatibility list includes QC35 Series I and II, plus QC2, QC15, QC25, AE2, AE2i, AE2w, SoundTrue Around-Ear and SoundLink Around-Ear. Check your exact model against that list before ordering.
No. It's a passive ear defender using ABS shells and triple-layer foam to reduce noise by 32dB SNR / 26dB NRR. It blocks a large chunk of loud sound but doesn't play audio or use active cancellation.
It depends entirely on your need. In my opinion the EM200 delivers more for its purpose because certified child hearing protection is hard to substitute, while the Krone pads are a repair part for headphones you already own. Compare current prices on Amazon for both.
Dr.meter states the adjustable headband accommodates toddlers, children, teenagers and adults, so yes — it's not strictly a kids-only fit.
The brand says the protein leather is durable enough to last 12 months or more, and recommends replacing ear cushions every 7 to 8 months for hygiene. The warranty is listed as 3 years manufacturer coverage.
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