Aful Explorer VS Kiwi Ears KE4

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Aful Explorer debuts at $120 with a clever blend of the Performer series’ RLC crossover and the Magic One’s 3D-printed resonators. The package is generous: a compact blue suede case, a silvery two-wire cable (3.5mm, also available in 4.4), and six tip pairs. The resin shells are neatly finished, pressure-relieved, and lightweight; the nozzles have open bores (mind debris—tips with mesh help). Comfort follows the usual semi-custom story: when the shape matches, they disappear; when it doesn’t, they don’t. The softer white stock tips work better than the stiffer blue cores, and SpinFit swaps (CP145/CP100) can improve retention. Aesthetic verdict from the “council”: sparkly blue with silver cable gets compliments.

Tonally, Explorer leans warm-neutral with a fun low-end. Sub-bass digs deep with tactile rumble, mid-bass adds weight without bloat, and the single DD keeps it tight. The mids are the star—natural, even, and unmasked; instruments and vocals sit correctly without husk or nasality. Up top, the treble is smooth and relaxed yet still resolves detail; cymbal timbre and vocal overtones decay cleanly without glare, inviting volume increases without fatigue. Technicals are quietly confident: clear separation, tidy imaging with some depth from the bass foundation, and a stage that feels average in size but organized. Sensitivity is high and impedance low, making them easy to drive from phones, tablets, and laptops.

Against peers, Explorer feels special under $300. Versus Letshuoer S08, Explorer is the more neutral and laid-back partner with a touch more sub-bass, while S08 adds upper-mid and mid-bass energy for a slightly more “exciting” tilt (Opera favors Explorer; classical often flatters S08). Performer 5 is more balanced with lighter bass and forward mids, and ZiiGaat Doscinco brings a warmed-up V-shape with bigger slam and more treble energy. Net-net: Explorer is a superb all-rounder with unique, well-executed tuning, standout accessories (that case!), and beautiful shells. The only asterisk is fit—try before you buy or use a friendly return policy. If the S08 felt too warm or planar-flavored, Explorer’s smoother hybrid take should be near the very top of the shortlist.

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Aful Explorer hits way, way above its bracket. Tuning snaps into focus with impact, cohesion, and smoothness that feel “stupid good” for $120—the kind of price that triggers a double-take. Expect a balanced, warm-leaning presentation that takes volume like a champ and turns kick drums into head-hugging thunder without smearing detail. Timbre is clean, clarity pops, staging gets big and immersive, and bass boost toggles aren’t required to have fun. Call it a giant killer, an easy 10/10, and a “top five of the year” contender that begs for playlist shuffles—from anime scores to classic synths—while scaling noticeably with better amps.

Build is light and comfy with twinkly blue faceplates, flush 2-pin sockets, and a stock cable that’s nicely twisted and terminated in 4.4 mm (full approval), though the ear hooks are thick and springy—softening the bend helps. The nozzle is a simple open port (no mesh), so keep ears clean. Accessories include multiple silicone tips and a compact, rubberized case that’s genuinely pocketable. Inside, it’s a 1DD + 2BA hybrid with a proper electronic crossover, 3D-printed acoustics, and pressure-balance tech; on paper it’s 26 Ω and “easy to power,” in practice it plays nicely from affordable dongles yet still rewards class-A and tubes with extra body and space. Minor QC quirks (a cosmetic cable sleeve can slip; easily fixable or just swap cables) don’t blunt the verdict: this is Aful’s most exciting budget brawler to date, out-punching the Performer series on pure fun-per-euro.

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Kiwi Ears KE4 is a 2DD + 2BA hybrid touting an isobaric subwoofer system and “sub-bass impact and slam.” The reality doesn’t match the brochure: the $200 package feels plain—simple box, basic case, few tips, and a generic 3.5 mm cable—while the tuning comes across as safe to a fault. Marketing promises of kick drum thump and bass guitar presence give way to a presentation that’s competent but uninvolving.

On music, the low end skews mushy rather than tight, transients lack bite, and the overall tone reads flat—the kind of “waiting-room” vibe that prompts a double-check of DSP settings. Even with a strong seal from premium tips, energy and excitement refuse to show up; it’s “fine ingredients, bland dish.” Technicals aren’t a disaster (it’s not unclear), but fun factor feels negative, recalling ultra-neutral sets like Softears Studio 4S that impress more than they engage. Verdict: about a 6/10 (maybe 7/10 on a generous day), with better value found in a cheaper Kiwi alternative at roughly half the price—skip the KE4 if musical thrill is the goal.

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Aful Explorer is a $120 hybrid (1DD + 2BA) that breaks from the brand’s usual neutral-with-sub-bass tilt and goes for a warm, bass-tilted signature. The package is simple but well chosen: two full sets of tips, a compact, soft-touch zip case, and a handsome stock cable available in 3.5 mm or 4.4 mm (with a secure chin slider and standard 2-pin). The semi-custom acrylic shells are medium-small, comfy, and stable—even suitable for side-sleepers—with above-average isolation and sensible venting. Overall build and ergonomics punch above the price.

Tonally, Explorer delivers satisfying impact with both sub-bass rumble and enough mid-bass to give kick drums real punch. Upper-mids are a touch relaxed, so vocals sit more within the mix rather than spotlighted. Treble is smooth yet carries a bit of sparkle for definition; despite graphs suggesting limited “air,” the timbre and perceived clarity are well judged. Stage favors depth over width, and the overall presentation stays engaging without stridency or mud—warm, dense, but not soupy.

Against peers, it’s the warmest pick here: more bass-rich than the Truthear Hexa (which remains the vocal-friendly warm-neutral choice), fuller and more polished than the older FiiO FH3 (though FH3 still throws a slightly wider image), and punchier than the single-BA Aful Magic One. Explorer is also the most distinctive AFUL tuning to date and arguably the most fun—especially for listeners prioritizing bass satisfaction over vocal focus. Verdict: a confident 4 stars for an entry-level IEM that brings a fresh flavor to AFUL’s lineup.

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Kiwi Ears KE4 is a $200 hybrid (2DD+2BA) that showcases the so-called “new meta” tuning—more body in the lower mids and a calmer lower treble versus the Harman Target. Packaging is simple: a pocketable case and bespoke silicone tips (usable, though even shorter tips can improve comfort). The cable handles well but feels a bit thin/kinky with heat-shrink earhooks, and the shells look plain, prototype-like. Fit is secure and comfy with a semi-custom shape, albeit a touch thick, so they can protrude from the ear.

Sonically, KE4 delivers a warm, low-contrast midrange that makes vocals sound natural and well-placed, with a pleasant mid-treble “frothiness” adding texture. Bass quantity leans on the mid-bass, but quality is the weak spot—soft/bloomy and a bit poofy, lacking density and punch, which can dull drive on bass-heavy tracks. Imaging is decent, treble is safe and balanced (not sharp or dark), and overall technicalities are respectable without chasing wow-factor.

Against peers: Truthear Hexa mirrors the new-meta mids with tighter, better-controlled bass; AFUL Explorer is more engaging with tighter slam and slightly crisper treble; the Harman-leaning Binary Chopin brings the best bass attack. KE4 is a strong choice for vocal-first listening and a clear example of the new meta, but the bass bloom can hold it back across a broad library. Verdict: a very solid 4/5 stars.

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Build & accessories punch above the price: the familiar Aful shell is exceedingly comfortable, light, and easy to seal, with a fit that feels “custom-like.” The new pocketable case has a soft, leathery feel and solid zipper, and the off-white two-pin cable mirrors the Pilgrim’s look and handling—supple, tidy, and on-theme with the Explorer’s subtle “space” aesthetic. Overall presentation feels notably premium for ~\$120.

Tonally, this is a dark, L-shaped tuning with a confident bass shelf and great dynamics, a deliberate 4–6 kHz dip for long-term comfort, and smooth upper-treble “air.” The graph aligns closely to the target aside from a subdued 1.5–4 kHz region, so vocals are relaxed rather than forward—non-fatiguing but not for strict Harman chasers. Versus Performer 8 and 5, Explorer brings deeper bass and a calmer presence region; compared with Magic One, it sounds richer and more organic; against CCA Hydro or PULA PA02, it offers more natural timbre, better build, and stronger value. Stage and mids can feel intimate, and tip selection/modular options are basic, but as a whole it earns a solid 8.1/10 and a full recommendation for listeners wanting a smooth, bass-weighted, non-fatiguing set that “hits different” at this price—akin in spirit to a darker Jupiter, at a tiny fraction of the cost.

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Build & accessories: understated box, a surprisingly nice cable with a “juicy” feel and flat 2-pin connectors, plus extra filters. The stock tips are the weak link—thin out note weight and feel downright horrific, so a tip swap is recommended. The medium-to-large shell is a highlight: secure fit, comfy nozzle size, and a handsome faceplate that looks premium in ear. Overall ergonomics and finish scream daily-driver friendly.

Sound: impactful, well-judged bass, lively upper mids, and a touch of upper-air jank; for $200 it’s a strong value with a clean, modern JM1-style tuning. Easily the most convincing Kiwi Ears to date: more balanced and natural than Quintet (which pushes upper mids/10 kHz energy), far more sensible than the treble-shouty Forteza, a clear upgrade over budget options like DLS and the tiny, poorly packaged Singolo, and less fatiguing than the bass-and-upper-mid heavy Melody. Against $200 benchmarks, KE4 becomes a new reference—cleaner male vocals and better build than “Chopin,” and a tighter low end plus tidier mids than AFUL Performer 5. Trades blows with Hype 4 at a fraction of the price; those craving a pricier step-up in the same vein can eye HiSenior Mega5EST. Measured verdict: Tier A, 3-star, 8.8 for tone—good imaging, solid soundstage, gamer-friendly, not flawless but genuinely excellent once re-tipped. A handsome, comfortable set that delivers outstanding value for newcomers and gift-givers alike.

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Aful Explorer sits around the $100 mark as a set that trades raw resolution for a uniquely relaxing tuning. At mid volume it’s a smooth, non-fatiguing listen with vocals a touch pulled back, a gentle upper-mids scoop, and a roll-off past ~15 kHz—so don’t expect sparkle or air in that range. The magic happens when it’s cranked: the set scales exceptionally, staying silky even loud, vocals come forward more naturally, and staging gets that wrap-around, immersive feel without turning sharp thanks to restrained 3 kHz energy.

Against pricier or punchier peers: versus Da Vinci, Explorer’s low-end has tighter mid-bass separation and quicker decay, but it doesn’t slam as hard; Da Vinci is more resolving, extended, and better balanced at mid volume, while Explorer becomes the more engulfing listen once volume climbs. Compared with the S8 planar, Explorer brings deeper sub-bass and fuller notes but a softer attack and less upper-mid/treble detail; the S8 stays cleaner, faster, and a bit brighter, thriving at moderate levels, whereas Explorer is the turn-it-up specialist.

For alternatives, Ziigaat Cinno is the cleaner, more airy take with sharper imaging and higher detail (with hints of BA timbre) and leaner sub-bass; Explorer hits harder, deeper, and stays smoother and more “musical.” CKVX offers a fuller low-end with a more pushed-back stage and better mid-volume resolution, while Explorer is the intimate, high-volume pool-of-sound. Magic One runs the warmest, with huskier vocals and mid-bass-centric weight that suits drums/rock/jazz but lacks the Explorer’s sub-bass presence and immersion. Net: if playlists lean hip-hop, rock, R&B, or lo-fi and volume tends to be lively, Explorer is a standout flavor; for quieter sessions or a priority on air and micro-detail, look to Chino/S8/CKVX. Both Explorer and Chino make compelling side-grades to the usual Harman-ish suspects like Nova and Supermix 4 without bruising the wallet.

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Kiwi Ears KE4 plays a warm-leaning, smooth and relaxing set at mid volume with slightly laid-back vocals and a good sense of space. The real trick is volume scaling: turn it up and the upper-mids/treble step forward with more detail without becoming shouty, while the bass grows thumpier and digs deeper. A 1 kHz scoop plus a tasteful ~3 kHz lift (gentler than Harman) keeps vocals extended yet non-fatiguing; the trade-off is vocal power/weight, which stays a touch mild compared to sets like RS5.

Driven by dual dynamic drivers, the KE4’s low end is among the best under $200 for texture, slam, and note weight, making the tuning feel full and grounded. It’s not as razor-quick in transients or as surgical in imaging as certain planars or techy hybrids, but the payoff is a more natural timbre. Treble sits in a balanced pocket—neither splashy nor dark—with none of the plasticky shimmer or planar/PZT glare.

Against peers: Supermix 4 and Quintet (and even the cheaper “Conta”) push more micro-detail and separation; Orchestra Light is the cleanest/most neutral but softer in bass and more complete in vocals. Versus CKLVX and PULA, KE4 trades their airy, sometimes peaky sparkle for a smoother, more grounded presentation and richer bass grip. Compared with Explorer, KE4 offers a clear step up in technicalities and low-end authority, while Explorer stays more intimate. Net: not the new “benchmark” at $200, but as a crank-it-up, musical all-rounder with standout bass and fatigue-free top end, KE4 is an easy favorite.

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Kiwi Ears KE4 drops at $199 and comes across as the best-tuned Kiwi Ears yet. Unlike the Orchestra Lite with its sub-bass roll-off or the budget Cadenza that skews a bit dark, this set keeps the sub-bass present and tight. Compared to the Dolce (energetic with more mid-bass) and the Quintet (politer bass, lighter upper-mids/late treble), KE4 adds more slam while smartly tucking the mid-bass so vocals stay clean. It’s a tuning that both looks right on the graph and lines up with real-music listening across hip-hop/R&B, rock, and acoustic cuts.

Low-end tests—808 drops and bass-guitar lines—hit clean and natural, and kick-drum transients keep their body instead of drying out. Female vocals get clarity without mid-bass haze, while male vocals avoid thinning—nicely balanced through the mids. The treble is managed with some late-treble roll-off, avoiding glare while preserving harmonic bite for guitars and cymbals over longer sessions. Net result: no qualifiers, no obvious weak spot, and performance that competes hard at $199. Easy recommendation and a frontrunner for the brand’s lineup to date.

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$199 hybrid with 2DD+2BA, the Kiwi Ears KE4 pairs a glossy, translucent faceplate with an ergonomic 3D-printed resin shell for all-day comfort. The stock 3.5 mm cable is light and flexible, the new silicone tips seal well, and spare filters are included. Sonically it follows the diffuse-field “new meta” tuning popularized by sets like Moondrop x Crinacle Dusk, Dunu Da Vinci, and Mega5 EST—but arrives as the most affordable in that crowd. Tonality leans a touch warm with a smooth upper-mid/treble that keeps gunshots from sounding harsh; for music, the presentation feels immersive and lively at the price.

For competitive play, performance varies by title. In Valorant: B, horizontal imaging and depth cues are convincing, and footstep “thumps” pop through clearly, aiding reaction time. In Apex Legends: B–, basic imaging and map awareness are fine, but busy fights expose separation/layering limits and a slight haze to light taps and micro-details. In Call of Duty: C+ (borderline B–), clarity and detail retrieval dip during chaotic moments and the game’s occlusion/breathing effects mask cues more than preferred. Overall, a stylish, comfortable DF-tuned IEM that’s great for music and a solid pick for Valorant, but not the first choice for top-tier Apex/CoD grinders—though it still makes the Wallhack Certified list.