In-Ear MonitorOverreview

7Hz Legato

Fourteen rigs agree on the bass. The reviewers do not agree on whether it is a feature.

45 sourcesUpdated
$109Typical US price

Score aggregates reviewer opinions across topics.

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7Hz Legato

The short version

What to know.

A basshead IEM tuned on purpose to a vintage, L-shaped signature. Reviewers agree on what it is — a 13 dB bass shelf that only flattens at 500 Hz, laid-back upper mids, a smooth top, an aluminium shell with a lavish case — and disagree on almost everything that follows: whether the bass is controlled or bloated, whether the mids are warm or veiled, whether the treble is safe or missing, whether the stage is big or congested, and whether $109 is a bargain or too much for a one-trick set. Build and comfort are the safe bets, with a documented left-shell-goes-quiet failure in a minority of units.

About this product

The 2023 dual-dynamic (12 mm woofer + 6 mm tweeter) — not the planar 7Hz × Crinacle Diablo it is often cross-shopped with, and not the Salnotes Zero it was pitched as an upgrade to. One silver colour, 3.5 mm stock cable only.

7Hz built its name on the Timeless planar and the $20 Salnotes Zero, and then did something unusual for a Chi-Fi brand in 2023: it stopped chasing the Harman target. The Legato is a $109 dual-dynamic — a 12 mm woofer crossed over to a 6 mm tweeter through tantalum capacitors, in a CNC aluminium shell — that its co-tuner Larry Fulton described as an attempt to bring back the 1970s-and-80s big-speaker sound: no more Harman, no more diffuse-field, tuned in his words with ears and hearts rather than gears and charts.

The result is an L-shaped set with roughly 13 dB of bass above the midrange, and a reputation that split on day one. Half the field calls it the properly-done bass cannon the market lacked; the other half calls it bloat with a nice case. Both are describing the same curve.

A good fit for

  • Bassheads who want sub-woofer weight and chest rumble first and everything else second
  • Movies, gaming and EDM/hip-hop, where the rumble and smooth top are the point
  • Listeners who grew up on 1970s–80s home stereos and want that tilt back
  • Treble-sensitive ears — no sibilance, no peaks, nothing bright
  • Anyone with a neutral set already, looking for the opposite for the weekend

Think twice if

  • It would be your only IEM — even its fans call it a specialist
  • Vocals, acoustic or classical are your main diet; female vocals sit behind the bass
  • You want air, sparkle or resolution — the treble is polite and detail is average at best
  • You run it from a phone or a high-impedance Bluetooth adapter and won't EQ or change tips
  • You need a slim, flush-fitting shell or strong passive isolation
  • A minority of units drop volume in the left shell after hours of use — buy where returns are easy

The reviewer consensus

Agreement &
disagreement.

10 / 12topics divide opinion
2 Mostly agree10 Divided opinions

Common ground5

  • It is a basshead set by design: roughly 13 dB of bass above the midrange, measured identically on fourteen rigs
  • Build is well above the price — all-aluminium shell, soft non-microphonic cable, spare filters and an oversized case
  • Comfortable for most despite a thick, protruding shell; tip choice matters for both fit and sound

Points of contention10

  • Bass quality — 'remarkably controlled for the quantity' vs 'dirty, bloated, needs EQ' (plus a lone 'less than the hype at stock')
  • Mids — forward and natural vs recessed and veiled; male vocals win either way
  • Treble — smooth and safe vs muted and lifeless: the same +8 dB peak read from two reference points

A closer listen.

12 topics · 10 divided
Left: criticalRight: positiveTighter lines: more agreement

Bass

Leans positiveDivided opinions
Reviewer sentiment38 supporting sources
CriticalNeutralPositive

Band: opinion spread · Dot: weighted average

Sources split three ways on the same shelf. The larger camp hears a big but controlled, snappy sub-woofer with little distortion; a nearly equal camp hears bloat that reaches into the lower mids and needs EQ; and one high-weight outlier reports the stock quantity itself as underwhelming — a report its own commenters attribute to fit. Seal, tips and source impedance move this set more than most.

Measured

Fourteen squig.link rigs agree to within ±0.5 dB below 1 kHz: relative to 500 Hz the shelf sits at +13.6 dB (20 Hz), +11.9 dB (60 Hz), +9.4 dB (100 Hz), and is still +5.1 dB at 200 Hz and +2.6 dB at 300 Hz — it only flattens around 500 Hz. Against Harman IE 2019 that is a further +4–5 dB from 40 to 200 Hz on top of Harman's own shelf.

vs. listeners — The graphs settle the quantity, not the verdict: the shelf that the 'controlled' camp hears as weight is the same 200–400 Hz tail the 'bloat' camp hears as mud. The lone 'not that bassy' report is not on any rig; the Legato is a shallow, vented fit, and a broken seal drops the sub-bass first.

Where it splits
huge but controlled — a properly executed bass cannon51%

“Still, the Legato maintains remarkable control over its large amount of bass. The bass is generally snappy and rarely overstays its welcome.”

o0genesis0o, Head-Fi
bloated — the shelf runs into the mids and wants EQ44%

“It has a 15 dB bass shelf that reaches to 500Hz, which is deep into the mid-range. Because of this, there is definitely many opportunities for muddy mid-ranges, and the Legato is something I classify as dirty bass.”

Antdroid, Audio Discourse
less bass than the hype at stock — it only wakes up with a boost5%

“I don’t consider this Legato to have aspiringly interesting or prominent bass quantity. It sounds enjoyable still, no doubt. But the quantity without bass boosting is shoulder-shrug worthy.”

Michael, Headfonics
Link to this topic

The hardware

Specifications.

Checked

Design

Type
In-ear monitor
Drivers
1 × 12 mm dynamic (composite diaphragm, N52 magnet (woofer)) + 1 × 6 mm dynamic (metal diaphragm, double-cavity (tweeter/midrange))2DD
Housing
CNC aviation-grade aluminum case

Electrical

Impedance
26 Ω
Sensitivity
108 dB/V≈ 92.1 dB/mW
Frequency response
10 Hz – 20 kHz

Connection

Cable
Detachable
Connector
0.78 mm 2-pin
Plugs supplied
3.5 mm

Manufacturer-published figures, not measurements · from linsoul.com.

Follow the evidence

Sources 45

1–6 of 45 sources

Read with context

Limitations & method.

As of

What to keep in mind 6

  1. A read of where the reviews land as of mid-September 2026, three and a half years after launch. Most of the written reviews date from the spring of 2023; the later voices — and both ranking aggregates — are noticeably cooler on it, so the verdict has drifted with time even though the product has not changed.

  2. Retail star ratings skew positive because they come from people who chose to buy a bass-first set: Amazon 4.4 from 35, Headphone Zone 4.41 from 59, Linsoul 4.7 from 35 with nothing under four stars. Head-Fi's sixteen reviews average 3.7 and split into a five-star group and a two-star group with little in between.

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