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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-01 · 7 min read · Independent comparison
• AOSHIDA TWISTURA D-Major — biggest strength: Interchangeable tube design with reference, pop and classical modes, plus a beryllium-coated composite diaphragm and a 10mm dynamic driver, giving you three sound signatures from one pair.
• AOSHIDA TWISTURA D-Major — biggest trade-off: No mic, so it is strictly for listening, and the extra tubes and adapters mean a bit more to manage and keep track of.
• Kefine Loric IEMs — biggest strength: Just 6 grams per earpiece with a contoured zinc alloy faceplate, so comfort over long sessions is the headline here.
• Kefine Loric IEMs — biggest trade-off: One fixed tuning — you get the modified Harman-style sound out of the box, with no tube swapping to change it.
• Who the D-Major is for: Listeners who want to shape their own sound and value build materials and cable quality.
• Who the Loric is for: Commuters, gamers and long-session listeners who prioritise light weight, bass depth and a smooth, easy fit.
The D-Major is built around a 10mm dynamic driver with a dual magnetic circuit and a dual-chamber design, and the spec sheet makes it clear that AOSHIDA wants you to hear the soundstage rather than just the driver. The beryllium-coated dome diaphragm with a PU surround is the kind of material choice that usually shows up in the "detailed but controlled" conversation — the coating is there for stiffness and durability, the PU surround for the movement that gives bass its body.
What really separates it, though, is the interchangeable tube design. You get a threaded quick-release mechanism and three sets of tubes: a standard reference mode plus pop and classical modes. In practice that means you can bias the tuning toward a warmer, more energetic presentation for pop or a cleaner, more open one for classical without buying a second pair of earphones. That is a genuinely useful feature for anyone who listens across genres.
The build is zinc alloy front and rear — electroplated at the back, oxidised at the front for corrosion resistance — and the cable is a detachable 0.78mm silver-plated audiophile-grade type. There is also a directional venting structure for airflow and chamber pressure relief, which the spec sheet credits with widening dynamic range. The box includes T-type eartips, silicone eartips, the three tube sets, a Type-C adapter cable, a leather storage bag and a one-year repair warranty.
Buy it if you want to tinker, swap cables later, and shape your own tuning. Skip it if you want zero fuss — the No Mic configuration and the extra accessories mean it is a listening-first, desk-and-couch kind of earphone rather than a take-calls-anywhere pair.
The Loric takes the opposite approach: pick one very good tuning and make the thing disappear in your ears. At 6 grams per earpiece, with a contoured zinc alloy faceplate and a UV-coated housing, this is aimed squarely at people who wear IEMs for hours — commuting, gaming, monitoring. Screw-reinforced construction is a small detail that matters more than it sounds: it is there to stop the shell separating if you drop them.
The driver story is a PU plus titanium composite diaphragm. The PU surround handles the low end and vocals, while a multi-layer titanium-coated dome applied with PVD nano-technology handles the treble — that split is a common way to get punchy bass without harsh highs. Kefine pairs it with an N52+N42 dual-magnet circuit for driver speed and sensitivity, and a dual-chamber acoustic design for bass depth and elasticity. The tuning target is a modified Harman 2019 curve with gentle low and mid lifts, which is a well-known recipe for an engaging, spacious, slightly bass-forward sound.
The cable is a detachable 0.78mm 2-pin design with 160-core silver-plated copper, so upgrades or a balanced source later are easy. Kefine also lists a two-year warranty and includes a protective case.
Buy it if you want a light, comfortable, bass-rich IEM you can wear all day and never think about. Skip it if you like the idea of changing your tuning on the fly — the Loric gives you one signature, and it is a good one, but it is the one you get.
Side-by-Side: Which Should You Choose?
• Best for tuning flexibility → AOSHIDA TWISTURA D-Major. Three interchangeable tubes (reference, pop, classical) versus one fixed tuning on the Loric.
• Best for bass depth → Kefine Loric IEMs. The N52+N42 dual-magnet circuit and dual-chamber acoustics are explicitly aimed at low-end depth and elasticity.
• Best for build and finish → AOSHIDA TWISTURA D-Major. Zinc alloy electroplating at the rear and zinc alloy oxidation up front, plus a silver-plated detachable cable in the box.
• Best for cable upgrades → Kefine Loric IEMs. The 160-core silver-plated 2-pin cable is already a step up, and the standard connector keeps future swaps simple.
• Best for gaming and monitoring → Kefine Loric IEMs. The modified Harman-style tuning and spacious stage suit critical listening and immersive gaming.
• Best for wired versatility → AOSHIDA TWISTURA D-Major. A Type-C adapter cable is included, so you can run it from a phone or laptop port without hunting for extra gear.
• Best for durability confidence → Kefine Loric IEMs. Screw-reinforced shells and a two-year warranty are the stronger long-term bet on paper.
In my opinion, the Kefine Loric IEMs are the safer buy for most people. Six grams per side, a bass-forward Harman-style tuning and a screw-reinforced shell make it the pair you can wear for a whole workday without thinking about it. I would pick the AOSHIDA TWISTURA D-Major instead if you enjoy tuning your own sound — those three tube sets are a real feature, not a gimmick, and the zinc alloy build is a nice touch. But if you just want one pair that sounds good and disappears, the Loric wins.
Whichever you lean toward, check the current price on Amazon before you commit — that is the number that should tip a close call.
A 10mm driver refers to the diameter of the dynamic driver inside the earpiece — the moving diaphragm that produces sound. Both earphones here use a 10mm-class dynamic driver, which is a common size for in-ear monitors because it balances bass output with detail. The AOSHIDA TWISTURA D-Major pairs its 10mm dynamic driver with a beryllium-coated composite diaphragm and a dual-chamber design.
Is 10mm driver good for earbuds?
Yes — 10mm is a solid, widely used size for in-ear monitors. It is large enough to move air for decent bass depth, but small enough to keep the housing compact and comfortable. Both the AOSHIDA TWISTURA D-Major and the Kefine Loric IEMs use a 10mm dynamic driver, and each brand tunes it differently: the D-Major with interchangeable tubes, the Loric with a modified Harman 2019 target curve.
The Kefine Loric IEMs list 6 grams as the weight of each earphone, not a 6mm driver — a common mix-up when reading specs. Weight and driver size are different things. A lighter earphone like the Loric tends to be more comfortable over long sessions, while the driver size affects the sound. So when you see "6" in the Loric's specs, that is grams per earpiece.
For pure comfort, I would lean toward the Kefine Loric IEMs — 6 grams per earpiece with a contoured zinc alloy faceplate is designed for fatigue-free wear. The AOSHIDA TWISTURA D-Major is the better pick if you want to change tuning mid-session, since its threaded quick-release tube system lets you switch between reference, pop and classical modes without changing earphones.
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