How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wider, more airy sound with a metal-and-resin build and a detachable cable you can swap over time, choose KZ ZEX Earbuds 1; if you need a smoother, bass-forward tuning that stays comfortable for hours and uses a printed cavity normally reserved for pricier designs, choose Fanmusic TRUTHEAR x Crinacle.
• KZ ZEX Earbuds 1 — biggest strength: a hybrid electrostatic + dynamic driver setup with a claimed 20Hz–40kHz range, wrapped in zinc alloy and resin with a silver-plated flat cable.
• KZ ZEX Earbuds 1 — biggest trade-off: the tuning leans toward an analytical, detail-first presentation, so listeners who want warmth or big bass may find it lean.
• Fanmusic TRUTHEAR x Crinacle — biggest strength: dual dynamic drivers in a DLP-3D printed cavity, tuned for a punchy low end and a non-fatiguing treble that suits long sessions.
• Fanmusic TRUTHEAR x Crinacle — biggest trade-off: a plastic enclosure and a frequency range that stops at 20kHz, so it trades exotic materials for tuning discipline.
• Who each pick is for: the KZ ZEX is for detail chasers and cable tinkerers; the TRUTHEAR is for people who want an easy, all-day listen.
The KZ ZEX pairs a 6.8mm low-voltage electrostatic unit with a 10mm dual-magnetic dynamic driver. That combination is the whole point of the product: the electrostatic side is described as handling the upper band with better sensitivity than the dynamic unit, which is where the "wide sound field" claim comes from. The numbers back the ambition — 20Hz to 40kHz, 103dB sensitivity, 25 ohms. A 25-ohm load is easy enough for a phone or a basic dongle to drive, so you don't need a dedicated amp to get it going.
Build-wise this is the more jewelry-like of the two. Cast zinc alloy plus imported resin, a body that's described as nearly seamless, and a polished streamline shell that catches light. The cavity contour is shaped around ear-canal data, and the surface is smooth, so comfort is clearly a design priority. The cable is a silver-plated flat type — flat cables resist tangling, and the silver plating is there to reduce signal loss and distortion. It's a 2-pin detachable design at 0.75mm, which means if the cable eventually fails you replace the cable, not the earphones.
Buy it if you like hearing layers and micro-detail, if you want a metal shell at this tier, or if you plan to swap cables. Skip it if you want a thick, warm, bass-heavy signature, or if touch controls matter to you — the ZEX uses touch-based media control, and its noise control is listed as none.
The TRUTHEAR ZERO:RED is a dual dynamic design: one 10mm driver and one 7.8mm driver, both using polyurethane suspension composite liquid-crystal dome diaphragms with N52 magnets and a double-cavity internal magnetic circuit. Two dynamic drivers is a different philosophy from the KZ's hybrid — instead of splitting the job between driver types, it splits the job between two dynamic units. The stated goal is a bass response similar to a public-preference curve below 1000Hz, with a neutral target curve above it, so you get punch in the low end without smearing the mids and highs.
The cavity is made with DLP-3D printing, a process the brand notes is usually reserved for high-end multi-driver and custom earphones, plus hand-applied glue and capping, hand polishing and automated gloss painting. The panel gets a natural smooth curve from the printing rather than being molded flat. The cable is copper-plated silver with a thicker single-strand diameter. Specs: 20Hz–20kHz, 117.5dB sensitivity, 17.5 ohms. That low impedance and high sensitivity mean it's very easy to drive from almost anything.
Sonically the description is specific and worth repeating: bright treble without irritation, warm and natural overall, less dynamic than the standard ZERO but conforming to HRTF characteristics, and explicitly suited to long listening without fatigue.
Buy it if you listen for hours at a time, want a warm-but-clear balance, or care about a printed cavity and a thicker stock cable. Skip it if you specifically want the airy top-end extension of an electrostatic hybrid, or if you prefer a metal shell over plastic.
• Best for upper-treble air and soundstage width → KZ ZEX Earbuds 1 (electrostatic unit, 20Hz–40kHz).
• Best for long, fatigue-free sessions → Fanmusic TRUTHEAR x Crinacle (warm, natural, non-irritating treble by design).
• Best for bass punch → Fanmusic TRUTHEAR x Crinacle (dual dynamic drivers, bass tuned to a preference-style curve).
• Best for material feel and durability of the shell → KZ ZEX Earbuds 1 (zinc alloy and resin versus plastic).
• Best for easy driving from a phone → Fanmusic TRUTHEAR x Crinacle (17.5 ohms, 117.5dB versus 25 ohms, 103dB).
• Best for cable replacement later → KZ ZEX Earbuds 1 (detachable 2-pin, flat silver-plated cable).
• Best for a printed, custom-style cavity → Fanmusic TRUTHEAR x Crinacle (DLP-3D printed shell with hand finishing).
• Best for analytical listening and detail retrieval → KZ ZEX Earbuds 1.
In my opinion, the Fanmusic TRUTHEAR x Crinacle is the safer buy for most people. The tuning brief — punchy bass, neutral upper mids, treble that doesn't wear you out — is exactly what an everyday in-ear should do, and the 17.5-ohm, 117.5dB spec means it will sound full from a phone without extra gear. I'd pick the KZ ZEX Earbuds 1 only if you specifically want that electrostatic-hybrid airiness and a metal shell, and you're fine with a leaner, more analytical character. If you're still deciding, check the current price on Amazon for both and let your budget settle the tie.
how to fit in ear headphones
Start by choosing the tip size that seals without pressure — the ZEX ships with S and L tips, and the TRUTHEAR uses rounded tips as well. Insert with a slight twist so the tip seats in the canal, then let the cable hang. A good seal is what gives you bass; if the low end sounds thin, try the other tip size.
how to clean in ear headphones
Wipe the nozzle and shell with a dry, soft cloth after each session, and gently brush debris off the mesh — never push anything into the nozzle. For the KZ ZEX, since the 2-pin cable detaches, you can separate the cable before cleaning the shells. Keep both models away from water; neither is described as water-resistant.
how to open in ear headphones
There's nothing to open on either model for normal use — both are sealed in-ear designs, and the TRUTHEAR's cavity is a sandwich structure held with glue, so prying it apart would damage it. "Opening" here means unboxing: the ZEX includes the earphones, two pairs of tips and a manual, while the TRUTHEAR includes the cable.
how to ear headphones
If you mean how to wear them, the rule is the same for both: the cable runs down the front of your ear, and the shell sits flush in the bowl of your ear. The KZ ZEX's cavity is shaped around ear-canal data for a contoured fit, and the TRUTHEAR's rounded tips suit most ears — adjust until the seal feels even on both sides.
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