7Hz Elua Ultra VS KZ Duonic

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Compact and comfortable, the 7Hz Elua Ultra brings a tidy dual dynamic driver package for around $30. The rounded shell uses a pretty metal faceplate, sits light in the ear, and isolates better than the 7Hz Zero/Zero 2. Details: flat 2-pin connectors, proper venting, two colorways, and a nozzle that grips tips well. The stock cable is fine for the price—right-angled 3.5 mm, 7Hz branding—but the Y-split wanders and there are no clear L/R markers. A handful of colorful tips is included; nothing fancy, but serviceable.

Sonically, this is a bassy, engaging tune with glidey, impactful low end, upper mids that are present without shout, and treble that’s acceptable yet a bit grainy with limited air and microdetail. The midrange can read a touch lean depending on normalization, giving a mild V/U flavor; still, the overall tonality feels fun and easy to enjoy. Compared against peers, it’s cleaner and less hissy than very V-shaped sets like the G1, shows more bass and upper mids than 7Hz Zero 2, yet can’t match higher-tier options (e.g., Punch Audio Martillo) for technical performance. Verdict: a solid B—good value and a worthwhile pick for listeners wanting a budget bass emphasis, even if the “twinkle” and ultimate resolution are a step behind pricier favorites.

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KZ’s Duonic arrives as a budget release built around a new Flux 3 hybrid concept: an 8 mm planar for speed paired with an 8 mm “super-linear” dynamic for bass. The shell is compact, comfortable, and isolates well; the stock cable is functional, though the unique connector makes sticking with KZ cables sensible. Priced around $22–$30 and equipped with DIP switches, it targets flexibility without bloating the accessories.

On the preferred 1-1-1 tuning, the Duonic presents a slightly V-shaped balance with punchy, rich bass, energetic upper-mids, and an elevated air region that gives music a lively, “awake” character. Graph variations mainly shift the lower mids, while >1 kHz remains broadly consistent; compared with sets like KZ’s recent budget darlings, this tuning feels more vibrant and less “scratchy.” Technicals are surprisingly solid at the price—snappy transients and a sense of space—though the treble can get incisive/sizzly and mids occasionally lose focus.

Despite quirks, performance punches far above the sticker, edging into territory usually associated with ~$100 sets and making it a benchmark-worthy budget pick. Tip and cable upgrades would round out the package, but even stock, the Duonic offers a distinctive, dynamic listen that’s easy to recommend for those who enjoy sparkle and bass drive. Listeners sensitive to treble bite may prefer a tamer profile, while everyone else gets a uniquely fun, hyper-competitive sub-$30 option.