By aspect — in detail
The single most-argued axis. Most reviewers hear the planar-plus-piezo top end as clean, smooth and non-fatiguing; a substantial owner minority — and the aggregate's #1 complaint — hears it as harsh, zingy, metallic or sibilant. The split tracks the PZT driver and is heavily moved by nozzle (gold is softer), volume (it gets pokey loud), tips/foam, and source.
Measured
Treble is carried by the 6 mm planar plus a piezoelectric (PZT) driver; listeners localize a hot region roughly in the 10–12 kHz range (a common PZT trait), and community EQ profiles cut around 3–5 kHz, 7.5 kHz and 12 kHz to tame it. The gold nozzle and stuffing the included foam filters both pull the top down.
⚠ vs. listeners — The same PZT-driven top end is heard as 'clean and non-fatiguing' by most reviewers (often on the silver nozzle, at moderate volume, with a clean source, or after adding foam) and as 'harsh, zingy, metallic' by a sizeable owner minority — 'harsh treble' is the most common owner complaint in the aggregate. Volume, source, nozzle, tips and the PZT timbre all move it, so there isn't one 'true' treble here.
Where it splits
Clean, smooth and non-fatiguing — no real sharpness or sibilance.60%
“EW300’s treble is clean and crisp. There’s no sharpness or sibilance but it has ample detail and a good amount of openness.”
Prime Audio
Harsh, metallic and sharp — the piezo top end is the weak spot.40%
“The reproduction of cymbals can sound unnatural, exhibiting a tinny and excessively sharp reproduction.”
McCullough Audio
Quality is broadly praised — a deep, sub-bass-focused low end with good speed and texture. Quantity is where it splits: most hear it as generous and punchy, while a minority finds it light or inconsistent. That minority view is almost always traceable to a weak source or a poor seal — it's a fairly sensitive set that comes alive with a bit more power.
Measured
Both nozzles ride a sub-bass-tilted shelf (Simgot's 'Golden 2023' on silver, a warmer 'Harman 2019' on the gold/gaming nozzle, which adds further low-end). Manufacturer specs: 10 mm dual-chamber ceramic-composite dynamic driver, 28 Ω, 121 dB/Vrms (silver) / 119 dB/Vrms (gold). redditrecs also flags 'Inconsistent bass performance' as a top owner con — the seal/source sensitivity in numbers.
Where it splits
Deep, generous, well-textured sub-bass — a highlight.76%
“EW300 has a sub-bass focus that produces a deep, visceral rumble.”
Prime Audio
Underwhelming / inconsistent quantity — very source- and seal-dependent.24%
“My experience is the complete opposite and find they don’t have any bass whatsoever, only used plugged into Xbox x controller so far.”
Icy-Macaroon-7022, r/iems
Generally a strength — rich, lush and natural, planar-driven, with female vocals a recurring favourite. The caveats are minor and consistent: thick male vocals can sound a touch thin or lifeless, busy tracks can muddle a little, and a faint planar timbre shows up now and then.
“The midrange might be the best part of the EW300. The planar driver really shines here and delivers a smooth, silky sound that works beautifully with vocals.”
HiFi Oasis
“These kind of male vocals might sound a bit lifeless and thin and out of character.”
hokagoteatimereviews, r/iems
Broad agreement on the recipe — warm-of-neutral with a sub-bass lift and only a gentle upper-mid rise, usually called a mild U-shape (labels range from neutral-warm to W- to mildly V-shaped). The nozzles shift it: silver is the more balanced/energetic pick, gold is warmer and more relaxed. A small critical camp hears it instead as a harsh V with recessed mids.
“The frequency response still hovers closely around Simgot’s 2019 golden target but is rendered with more warmth and body.”
Prime Audio
“Warm and slightly dark: Full sounding, but not excessive bass, warm mids and dark leaning treble.”
The Headphoneer
Measured
Per Simgot/Linsoul the two nozzles target the 'SIMGOT-Golden2023' (silver / red ring) and 'H-2019 / Harman 2019' (gold / purple ring, marketed for gaming) curves — a warm-of-neutral, sub-bass-lifted gentle U-shape that the gold nozzle warms and relaxes further.
The all-metal CNC shell is a near-universal high point — 'built like a tank,' premium beyond its price. The asterisks are real, though: the mirror-silver finish is a fingerprint magnet, the black/matte (HBB/DSP) finish is reported to wear or peel, the stock cable is so-so, and a small minority report crackling/distortion or dead units.
“The EW300 is a very robust, strong, solidly built set made entirely of metal alloy with that slick mirror polish.”
Mobileaudiophile
“their QC is something strange, the paint wears off quickly and the plate can peel off in a few months”
ElJispa, r/iems
Measured
CNC-machined high-density alloy shell (shared mold with the EW200), mirror-plated silver or sandblasted matte black, ~9.4–9.6 g per side, 0.78 mm 2-pin, silver-plated OFC cable.
A consistent strength for the price — resolving and clean across the range, frequently called above its bracket. The honest ceiling: it isn't the most transparent set at any price, and a little of the perceived 'detail' up top is the piezo's edge.
“It exhibits remarkable detail retrieval and resolution across the entire frequency spectrum.”
McCullough Audio
“Not the most transparent sound”
Prime Audio
A consistent shape, not a disputed one: comfortably wide with good height, but with notably limited depth — so the width impresses while front-to-back layering is the weak dimension. Good for the price, short of class-leading.
“The soundstage has great height and width, and average depth performance.”
HiFi Oasis
“the width of soundstage is more than average while the depth sounds a bit lacking.”
hokagoteatimereviews, r/iems
Rated good-to-very-good for the price — clear placement and separation, helped by the width. The caveats: it's not pinpoint, and the limited stage depth flattens precise localisation for a couple of reviewers (and for FPS-focused gaming).
“by-and-large the EW300 performs well with imaging and layering”
Mobileaudiophile
“I cannot seem to pin point the position and distant of the sound effects beyond the general area they reside on the soundstage.”
In-ear Gems (NKT)
Mostly a plus — a compact, lightweight all-metal shell that sits well and works for long sessions and small ears. The recurring caveat is the short nozzles, which can make the seal shallow or fiddly and tip-dependent for some.
“Fantastic comfort, can be worn for hours without much issues”
hokagoteatimereviews, r/iems
“the nozzles are short, so I have some difficulty getting the IEM to fit properly.”
In-ear Gems (NKT)
Measured
Compact all-metal shell shared with the EW200, ~9.4–9.6 g per side, with nozzles reviewers repeatedly describe as short — so fit and seal can be tip-dependent.
Lively and engaging when fed properly — good macro-dynamics and an exciting presentation. The common caveat is drivability: it's a medium-to-high-volume set that wants a little more power to fully wake up.
“Macro-dynamics come through well from the uplift in the sound which makes for an exciting listening experience.”
Mobileaudiophile
“Requires a bit more volume than usual to sound at its best (Its a medium to high volume iem)”
hokagoteatimereviews, r/iems
Average and unremarkable, as expected from a vented IEM — fine for casual use, not a strong isolator. Little disagreement here.
“Isolation is perfectly average for IEMs – nothing special and yet not horrible either.”
McCullough Audio
“Noise isolation is similar to other vented IEMs.”
In-ear Gems (NKT)
Value
Strong consensus12 srcThe strongest point of agreement — a premium-built tribrid with real tuning flexibility and all-round, gaming-friendly sound at ~$69 is treated as a bargain almost across the board. The one recurring dissent is the DSP edition, whose in-cable DAC several owners call underpowered, and the usual 'rivals exist' (Hexa, S08, EA500 LM, SuperMix 4).
“another great sub-$100 IEM that gets just about everything right”
Prime Audio
“The dsp is bad because the dac inside the cable is severely underpowered.”
Hungry_Freaks_Daddy, r/iems
Measured
~$69 (standard) to ~$76–80 (HBB / DSP). Owner aggregates: 4.4/5 from 409 Amazon ratings; ~4.2/5 across ~84 Linsoul reviews; #6 in IEMs and 72% positive across 294 aggregated Reddit reviews.