By aspect — in detail
The single most-argued axis. One camp hears crisp, airy, well-extended treble that isn't fatiguing; another hears it as bright, peaky, even shouty or sibilant. The split tracks tips, seal and unit variance heavily — foam tips and a deeper seal tame it for many.
Measured
On the GRAS 45CA, amirm (ASR) flagged nearly 3% distortion around 1.8 kHz ('shockingly disappointing,' the planar panel resonating); reviewers localise a dip near 5–6 kHz and a peak around 7–8 kHz, with owners reporting channel imbalance up around 7–10 kHz.
⚠ vs. listeners — Graphs read the top end as bright-with-a-peak, but whether that lands as 'exciting' or 'fatiguing' is largely an ears/tips/seal outcome — foam or taller tips and a deeper seal calm it, and part of the upper-treble peak is a coupler/ear-canal artifact — so there isn't one 'true' treble here.
Where it splits
Bright / peaky / fatiguing — the treble is the weak spot.55%
“What's definitely in need of work is the treble response.”
Precogvision, Headphones.com
Crisp, airy and extended — not shouty or harsh.45%
“It's a treble that's crisp, detailed and airy, not to mention extremely quick.”
primeaudio.org
Sources broadly agree on strong, deep sub-bass and a generous bass boost; they split on quality. To some it's full, fun and satisfying; to others the mid-bass attack is soft and rounded, short on texture and slam, and can bloom.
Measured
ASR's GRAS 45CA FR shows a healthy sub-bass shelf; amirm rates sub-bass excellent and used a small EQ cut to take 'a bit of boominess' away. The soft leading edge is the characteristically soft planar transient several reviewers describe.
Where it splits· split roughly even
Deep, full and fun — the sub-bass is a highlight.
“sub-bass performance was excellent owing to nice boost in low frequency response”
amirm, Audio Science Review
Soft, undertextured mid-bass — limited slam.
“Overall, the Timeless has satisfying bass on the surface, but comes up shorter when I listen more closely.”
Precogvision, Headphones.com
Everyone agrees on the recipe — a bass boost with a bright top end and mids that aren't deeply recessed (variously called U-shaped or a light V). They split on the verdict: a pleasing, fun colour, or a flawed signature best fixed with EQ.
Measured
On the GRAS 45CA the FR tracks ASR's target closely apart from a pulled-down ~3.5 kHz region and a sub-bass lift; amirm calls the tonality 'slightly outside' target but registers 'no complaints.'
⚠ vs. listeners — Same coloured response (bass lift + bright top, mids not deeply recessed) read as 'fun and fine' by some and 'flawed, EQ-it' by others — one tuning, opposite valence.
Where it splits
Flawed — chock-full of minor issues, better EQ'd.37%
“the tuning of the Timeless is simply chock full of minor issues”
Precogvision, Headphones.com
Genuinely split. Most find the lightweight, low-profile coin shell surprisingly comfortable for long sessions; a sizable minority find the disc shape and short nozzle dig in, fit shallow, or hurt within an hour — it's very ear-shape dependent.
Measured
Compact CNC aviation-grade aluminium disc, ~5 g per side (Amazon), with an angled nozzle that several owners call short for the shell's size, so seal can be tip-dependent.
Where it splits
Coin shell / short nozzle digs in or fits shallow.33%
“I could feel the circular shells starting to dig in after a couple hours.”
Precogvision, Headphones.com
Split down the middle. Some hear precise placement and strong separation as a highlight; others call it average-to-below-average and 'two-dimensional,' a flatness the lack of stage depth tends to reinforce.
Where it splits· split roughly even
Precise, good separation — a strength.
“Imaging is similarly strong, with plenty of granularity across the horizontal soundstage.”
FC Construct, Headphones.com
Average to below-average / two-dimensional.
“I'd say it's somewhere within the realm of average, perhaps slightly below average if I'm being more harsh.”
Precogvision, Headphones.com
A clear strength and the most-cited reason to buy in — fast, resolving planar detail that punches above $220. The caveats: micro-detail isn't class-leading, and the lone critic hears the resolution as overstated.
“the Timeless is a stellar technical performer for $220.”
Precogvision, Headphones.com
“Microdetails are virtually inexistent on the low end, and below average on the highmids and trebles where they get lost in the general lack of refinement”
audioreviews.org
A consistent description across reviewers: comfortably wide, but with notably little depth — so the width impresses while layering and front-back space fall short.
“The 7Hz Timeless has an extremely wide soundstage but it's one with very little depth.”
primeaudio.org
“Stage width is comfortably large here, though there is a distinct lack of stage depth.”
FC Construct, Headphones.com
Leans modest — the soft planar attack means limited slam and a sense it 'isn't the most dynamic,' though the lively, fast presentation reads as energetic and exciting to some.
“the Timeless isn't the most dynamic of IEMs, despite having plenty of quantity.”
FC Construct, Headphones.com
“The 7HZ Timeless shows a very exiting bass response with its highly dynamic, clean and fast character.”
MoonStar Reviews
Generally liked — clean and transparent, with mids that aren't deeply recessed. The recurring minority caveats are lean, slightly thin male vocals and a forward upper-midrange that a few find borderline shouty.
“The mids of the Timeless is by far the best part of its tuning.”
FC Construct, Headphones.com
“the upper-midrange of the Timeless is quite forward, almost annoyingly so at times.”
Precogvision, Headphones.com
Measured
amirm notes a 'pulled down area around 3.5 kHz'; the lower mids sit a touch behind a forward upper-mid/pinna region, which is the contrast a few reviewers describe.
Net positive — a premium, durable one-piece CNC-aluminium shell and a well-liked stock cable. The caveats are real, though: reported channel imbalance / unit-to-unit variance, and a heavy aluminium case opinion splits over (tank-like, or pointless dead weight).
“The housings appear solid and well assembled.”
audioreviews.org
“the channel matching is not the best in the upper mids and treble region.”
FC Construct, Headphones.com
Measured
CNC aviation-grade aluminium shell, 14.2 mm planar driver, 14.8 Ω, 104 dB, MMCX, ~5 g per side; ships with a solid milled-aluminium case (specs / TechPowerUp / Amazon).
Middling and tip-dependent. Most land on 'average,' with a real spread either side — fine for commuting to one reviewer, poor to another — as you'd expect from a vented planar.
“Noise isolation is above average too, making the timeless perfect for commuting or use in noisy environments.”
primeaudio.org
“The trade-off is that it doesn't isolate very well.”
FC Construct, Headphones.com
Broadly seen as a landmark value at ~$220 — a planar that out-resolves much of its price bracket and takes EQ exceptionally well. The dissent: it's a flavour-of-the-month some find overrated, non-planar rivals beat it on refinement, and newer planars have since caught up.
“At $220, there are no caveats here that make me hesitate to recommend the 7Hz Timeless.”
FC Construct, Headphones.com
“I also don't think I'm entirely aboard the hype train”
Precogvision, Headphones.com
Measured
$219.99 MSRP (about $209 on Amazon as of mid-2026); Crinacle's relayed verdict was top-tier sound and value; 4.5/5 from 712 Amazon ratings, though aggregated Reddit sentiment runs only about half positive.