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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want the classic transparent look, a Bluetooth-upgrade path and a slightly lower impedance load, choose erjigo EDXPro KZ EDX; if you need the flat 5N OFC cable, a color choice that includes cyan, and the newer "Pro" tuning reputation, choose keephifi KZ EDX Pro. Both are 10mm single-dynamic in-ears with a 10Hz–20kHz range and 112dB/mW sensitivity, so your real decision comes down to cable, finish and which version of the EDX tuning you want on your desk.
• erjigo EDXPro KZ EDX — biggest strength: the 0.75mm 2-pin detachable cable system is explicitly pitched as an upgrade platform, including swapping in a Bluetooth module cable to go wireless.
• erjigo EDXPro KZ EDX — biggest trade-off: you're buying the older EDX tuning and a plain plastic shell in transparent or classic white/black, with no flat OFC cable called out.
• keephifi KZ EDX Pro — biggest strength: a 5N OFC anaerobic copper flat cable is included, which is the kind of stock cable most people never bother replacing.
• keephifi KZ EDX Pro — biggest trade-off: the package is leaner — keephifi's own note says new packaging ships with only one set of ear tips.
• Who each is for: pick erjigo if you want to tinker and go wireless later; pick keephifi if you want the better stock cable and a resin-and-metal shell out of the box.
The erjigo EDXPro KZ EDX is built around a Φ10mm composite magnetic dynamic driver with a stated low-frequency dive down to 10Hz and a 10Hz–20kHz range. Impedance is 23Ω and sensitivity is 112dB/mW, which is a genuinely easy load — that combination means a phone, a dongle or a budget DAP will drive it to satisfying volume without strain. The tuning is described as popular and ACG oriented, with a solid magnet increasing low-frequency density for electronic and heavy instrumental music, while a fast transient response handles vocal and classical midrange detail.
The shell is skin-friendly imported resin, high-temperature molded and UV-varnished for that glossy luster, and the earpiece is a rounded-tip, over-ear hook design. That hook shape is the practical part: it sits the weight on your ear rather than the canal, and the spec sheet claims it can cut external noise enough that 15–30% volume is all you need. Cable is 125±5cm, 3.5mm jack, 0.75mm gold-plated 2-pin, and the whole thing is 23±3g. There's a 12-month warranty.
The reason I'd point someone here is the upgrade story. The 0.75mm 2-pin connector isn't just a replacement path — erjigo explicitly frames it as a way to go wireless with a Bluetooth module cable. If you want one pair of in-ears that starts wired at your desk and turns into a Bluetooth set for the gym, that's the hook.
Skip it if you want the newest "Pro" tuning, if you specifically want a flat OFC cable in the box, or if you dislike transparent shells. Also note the Bluetooth tech listed in the connectivity field refers to that upgrade path, not built-in wireless — the stock unit is wired.
The keephifi KZ EDX Pro runs the same driver concept — 10mm composite magnetic dynamic, 10Hz low-end extension, 10Hz–20KHz range, 112dB sensitivity — but the impedance is listed at 24Ω, one ohm above the erjigo. Functionally that's the same story: it's a low-impedance, high-sensitivity in-ear that runs off a phone or a cheap dongle. If you add a DAC, keephifi's own material notes the experience improves further.
The headline difference is the cable. Keephifi ships a 5N OFC anaerobic copper flat cable, and flat cables are the ones that resist tangling and survive being stuffed in a pocket. It's still 0.75mm gold-plated 2-pin, so upgrades are possible, but the stock cable is already the upgrade most people would buy. The shell is a resin cavity with a metal ornament, and you get three color choices: Classic Black, Cyan, or White.
On sound, keephifi describes a warm signature with increased low frequencies and a deep, clear presentation, and positions the set for gaming as well as stage and general listening. The theme field literally reads "Video Game," so the marketing leans that way. Noise control is listed as active noise cancellation and the controls are an integrated media control strip.
Two honest trade-offs. First, keephifi's own packaging note says the new packaging includes only one set of original ear tips — so if you're between tip sizes, budget for spares. Second, microphone behavior is called out as generally compatible with Android phones and MP3 players, which is a warning sign if you're on iOS. The no-mic variant exists for a reason.
Who should buy it: anyone who wants a flat, durable cable and a resin-and-metal build without shopping for accessories. Who should skip it: tinkerers who want the Bluetooth-module path, and anyone who needs a mic they can trust on an iPhone.
• Best for a wireless future → erjigo EDXPro KZ EDX, since the 2-pin system is explicitly pitched for a Bluetooth module swap.
• Best stock cable → keephifi KZ EDX Pro, with 5N OFC anaerobic copper flat cable included.
• Best for phone-only listening → either, at 23Ω/112dB and 24Ω/112dB respectively; both are easy to drive.
• Best for gaming focus → keephifi KZ EDX Pro, which is marketed for gaming and carries a Video Game theme.
• Best for color choice → keephifi KZ EDX Pro, with Classic Black, Cyan and White versus the erjigo's transparent/black-and-white options.
• Best for accessory simplicity → keephifi KZ EDX Pro, unless tip swapping matters, in which case the erjigo's fuller package is the safer bet.
• Best for a lighter, hook-style fit → erjigo EDXPro KZ EDX, at 23±3g with pre-formed ear hooks and a 125±5cm cable.
• Best for deep-bass electronic and heavy instrumental listening → either, since both use the same class of 10mm composite magnetic dynamic tuned toward popular and ACG material.
In my opinion, most people should buy the keephifi KZ EDX Pro. The flat 5N OFC cable is the single most useful thing in either box — it's the part you'd otherwise go buy — and the resin cavity with a metal ornament plus the Cyan option makes it the better-looking daily pair. I'd only steer you to the erjigo EDXPro KZ EDX if the Bluetooth-module upgrade path is the whole reason you're shopping, because that flexibility is genuinely the thing keephifi doesn't emphasize. Neither one is a hard-to-drive headphone, so don't let the impedance gap decide it.
do high impedance headphones sound better
Not inherently. Higher impedance mainly changes how much voltage a source needs to drive the headphone properly. Both of these are low-impedance in-ears — 23Ω and 24Ω — so the "high impedance" advantage doesn't really apply here.
is high impedance good for headphones
It can be, for studio and pro gear where higher impedance pairs with high-voltage amplification and can lower noise floor. On a phone or a budget dongle, high impedance usually just means you get less volume, which is why low-impedance sets like these two are easier to live with.
are high impedance headphones better
Not automatically. Impedance is a matching number, not a quality score. Driver design, tuning, fit and seal matter far more, and both of these EDX variants share the same 10mm dynamic driver, 10Hz–20kHz range and 112dB sensitivity.
why are high impedance headphones better
They aren't always. The argument is that with a powerful amp, higher impedance can mean a lower noise floor and a more consistent load — useful in a studio. For casual listening from a phone, low impedance is the practical choice.
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