Audiowords
Hidizs MP145

Hidizs MP145

A giant driver in a giant shell — and a treble that shifted after launch.

The original aluminium MP145 — one 14.5 mm planar driver, three screw-in nozzles — in Blue, Silver, Titanium or the limited Golden Titanium edition. Not the 2026 MP145 PRO, a separate later set, and not the smaller MP143 Salt. Later production runs are a quietly revised version of this same model that measures softer in the upper treble.

OverreviewIn-Ear Monitor17 sourcesas of 2026-07-30

Hidizs spent years making portable players and dongle DACs without quite breaking through in in-ears, and the MP145 is the set that changed that. It arrived in September 2023 on Kickstarter, two years after the 7Hz Timeless had made cheap planar IEMs a category, with an unusually large 14.5 mm diaphragm, an all-aluminium shell styled after a whale's tail, and a share of sales pledged to whale conservation.

It became a default recommendation almost immediately — and then became an argument. Some of the argument is the ordinary kind, about whether the stage is big or the treble is bright. Some of it is not: about a year in, owners noticed that newly shipped pairs did not measure like launch pairs, and the graphs bore them out.

The overview

A large planar in-ear with a big, sub-bass-led low end, unusually good separation for the money, and a premium metal shell. Reviewers broadly agree on imaging, resolution, build and measured cleanliness — distortion is essentially non-existent at listening levels. They split hard on almost everything else: whether the treble is extended or safely rolled off, whether the stage is class-leading or ordinarily planar-narrow, whether the midrange is among the best at the price or noticeably pulled back, and whether shells this size are livable. Two independent rigs largely explain the tonal disputes: a roughly +10 dB shelf at 20–30 Hz that is back near level by 200 Hz, the quietest part of the whole curve sitting at 500 Hz–1 kHz, a modest ear-gain peak placed low at about 2.3 kHz, and a big 8 kHz peak wedged between a 6 kHz dip and a 12 kHz notch — so the bright camp and the dark camp are describing different octaves. The separate, better-documented dispute is that later production runs measure 1 to 4 dB softer through 6.5–9 kHz than launch units, with a different rear chamber inside; Hidizs calls that normal production tolerance.

Where they agree

  • The all-aluminium shell reads as premium well above $159 — even critics say so.
  • Separation and instrument placement are a real strength; air between instruments is the most repeated compliment.
  • Resolution punches above the price: the recurring line is that a clear step up costs considerably more.
  • The low end is big and sub-bass-led — roughly a +10 dB shelf at 20–30 Hz on two independent rigs, back near level by 200 Hz.
  • Measured cleanliness is not in question: distortion is essentially non-existent at listening levels and impedance is flat.
  • Nobody finds the upper mids shouty, which the low, modest ear-gain peak explains.
  • The three screw-in nozzles make real but modest changes — silver adds treble, red takes it away.
  • Isolation is adequate rather than class-leading, and there is no pressure build-up.

Where they split

  • Treble: extended and sparkly, or safe and short of air — the graphs put a big 8 kHz peak between a 6 kHz dip and a 12 kHz notch, so both camps are right about different octaves.
  • Soundstage: one of the best at the price, or ordinarily planar-narrow with width borrowed from the scooped lower mids. The split is close to even.
  • Midrange: a highlight for clarity, deliberately safe, or noticeably pulled back with distant male vocals — three stances, not two.
  • Comfort: livable for long sessions for a minority, too large and sharp-edged for most, with owner reports of the faceplate cutting into the ear.
  • How much amplification it actually needs, from "considerably tasking" on a phone to easy off a mid-range dongle.
  • Value: a benchmark at the price for most, undercut by accessories and the mid-life retune for a real minority.
  • Whether later production runs are the same product: three independent measurements say the newer batch is 1–4 dB softer through 6.5–9 kHz and has a different rear chamber inside; Hidizs calls it normal tolerance.
The verdict, mappedEvery aspect on one axis — criticized to praised. Hover a point for its spread; click to jump.
CriticizedNeutralPraised

By aspect — in detail

Bass

Moderate · 8 src

Widely praised, with one consistent qualifier: it is sub-bass-led rather than punchy. Reviewers agree on depth, rumble and planar speed; the dissent is about weight — several note the mid-bass returns to level fast, so slam-seekers find it light, and one finds the mid-bass the more dominant of the two.

Quick, deep and always on point, this is great!

NanoTechnos, Headfonia

The MP145 have fairly dense and punchy bass, but the speed is lacking slightly due to some added damping in the balanced and bass filters.

Kazi Mahbub Mutakabbir, Headphonesty

The area of impact is big but it isn’t heavy or very punchy.

Suman Sourav Meher, The Headphone List
Measured

Two independent rigs agree, normalized at 500 Hz: roughly +10 dB at 20–30 Hz, +9.4 to +10.1 at 50 Hz, +6.8 to +7.3 at 100 Hz, and only +3.2 to +3.9 by 200 Hz — a shelf that is nearly flat from 20 to 50 Hz and clears the midrange quickly. ASR measures distortion as essentially non-existent at 94 dBSPL.

⚠ vs. listeners — Both readings are right. The shelf is very large where sub-bass lives and largely gone where mid-bass punch lives, so "deep and rumbly" and "not a heavy hitter" describe the same curve.

Mids

Contested · 7 src

Sources split three ways rather than two. One camp calls the midrange a highlight for clarity; one hears the lower mids pulled back and male vocals set distant; a third calls it deliberately safe — inoffensive rather than a selling point. Nobody calls it shouty.

Measured

Both rigs put 500 Hz–1 kHz at the lowest point of the entire curve (1 kHz reads only +0.9 to +1.1 dB over 500 Hz) and place ear gain unusually low and modestly — +6.9 to +8.1 dB peaking at 2.27–2.47 kHz rather than the usual 3 kHz. Headphonesty's own prose figure, "about 7dB" of pinna gain, matches its rig exactly.

⚠ vs. listeners — A low, modest presence peak is why no reviewer finds it shouty — and also why the same tuning reads as clear to some and as set-back to others: vocal energy arrives around 2.3 kHz, below where a chest-forward male vocal wants help.

Where it splits
a highlight — among the best mids near the price29%

In this price range, I’d say those are one of the best mids you could get up to this day, surprise, surprise!

NanoTechnos, Headfonia
lower mids pulled back; male vocals sit distant36%

Due to some recession in the lower-mids, male vocals can sometimes sound distant.

Kazi Mahbub Mutakabbir, Headphonesty
safely tuned — smooth and inoffensive rather than a highlight35%

Vocals on the MP145 are banking on its safer timbre to control the climb to shoutier regions since the midrange has an intimacy to it.

Aldous, Headfonics

Treble

Contested · 8 src

The most contested axis, and the one the production change touched. One camp hears real extension and sparkle with no sibilance; the other hears a safe top end that wants more air out of the box. A recurring middle note is unevenness rather than level: Headphonesty attributes the airiness to a spike near 14 kHz that "can be fatiguing in tracks with heavy cymbal hits," and owners report it turning sharp at high volume. The silver nozzle adds treble; the red nozzle takes it away.

Measured

Both rigs show the same top-end architecture over 500 Hz: a dip at 5.8–6.4 kHz (+2.4 to +4.1 dB), the dominant peak at 7.75–8.0 kHz (+7.0 to +11.2 dB — part of which is the known IEC-711 artifact), a notch near 12 kHz (−3.7 to −4.1 dB), and no agreement above 14 kHz (one rig +4.0, the other −1.3). ASR's GRAS rig independently reports "some shortfall in treble region" against its target.

⚠ vs. listeners — The graphs support both camps at once, in different octaves: there is a genuinely large peak at 8 kHz (the sparkle, and the sharpness at volume) sitting between a 6 kHz dip and a 12 kHz notch (the missing air). Which one a listener notices also depends on insertion depth and on which batch they own — the revision cut 0.8 to 2.2 dB out of 6.5–9 kHz.

Where it splits
extended and lively — sparkle and air, occasionally sharp at volume45%

What these planar drivers are capable of are some of the best treble response and MP145 is no exception.

Suman Sourav Meher, The Headphone List
safe and short of air — wants more extension out of the box55%

Initial impression was one of neutral present for the most part, lacking a bit of emphasis in highs.

amirm, Audio Science Review

Tonality

Moderate · 7 src

Positive overall, but reviewers reach for different labels for the same curve — U-shaped, reasonably V-shaped, neutral, warm. Hidizs advertises the H-2019 (Harman) target, a claim one reviewer holds up only for 500 Hz–1 kHz. The single dissenting voice reads it as warm and declines to recommend it on tonal grounds.

It’s 14.5 mm drivers are tuned to deliver class leading SQ with a reasonably V shaped signature that doesn’t feel aggressive or lean at any point.

Suman Sourav Meher, The Headphone List

Hidizs advertises that the MP145 is close to the Harman 2019 V2 target, which is accurate if you only consider the 500 – 1000Hz region.

Kazi Mahbub Mutakabbir, Headphonesty
Measured

The measured shape is consistent across rigs: a ~+10 dB sub-bass shelf, a trough at 500 Hz–1 kHz, a modest +7 to +8 dB ear-gain peak placed low at ~2.3 kHz, and an 8 kHz peak — a U with an unusually low presence region, which is why one reviewer's "V-shaped" and another's "warm" can both fit.

Soundstage

Contested · 6 src

Genuinely split, and close to even. Half the field calls the stage one of the best at the price, singling out depth; the other half calls it average or planar-narrow, with one reviewer arguing the width is an artefact of the scooped lower mids rather than real space.

Measured

Both rigs put the 500 Hz–1 kHz band at the bottom of the curve, beneath both a +7 dB 100 Hz shelf and a +7 to +8 dB 2.3 kHz peak. That scooped middle is the physical basis for Headphonesty's argument that the apparent width is a by-product of lower-mid recession.

Where it splits
unusually big for the price — width, height and depth49%

Few years ago it was criminal to expect a well developed stage at this price but guess what, MP145 has one of the best stage expansion and imaging.

Suman Sourav Meher, The Headphone List
average at best; the usual planar narrowness51%

The soundstage of the MP145 is on the average side where it consistently positions instruments around the driver region.

Aldous, Headfonics

Imaging

Strong consensus · 6 src

The clearest point of agreement after build. Separation, air between instruments and placement accuracy are praised across editorial, community and critical sources alike — including by reviewers who dislike the set overall.

Layering and separation are superb with class leading amount of air between instruments.

Suman Sourav Meher, The Headphone List

Imaging is better than staging, with instruments having well-defined cardinal positions.

Kazi Mahbub Mutakabbir, Headphonesty

Detail

Strong consensus · 7 src

Consistently called strong for the money, with the recurring line being that a clear step up costs considerably more. The one qualifier is note edges: Headfonics finds the leading edge blunted on the default nozzle, and the reviewer who measured both batches preferred the launch unit for lower-treble detail.

MP145 has superb details, excellent clarity and much better control over sharpness than S12 pro and Talos.

Suman Sourav Meher, The Headphone List

I must say that the bite is quite shallow so the edges feel a bit blunted.

Aldous, Headfonics

I’m leaning more towards the Old MP145 for just that bit of detail in the lower treble region, overall resolution as well as slightly wider sounding

vandung2510, Head-Fi
Measured

ASR measures distortion as "exceedingly low" and flat impedance, so the resolution reviewers hear is not fighting audible distortion at normal levels.

Dynamics

Moderate · 6 src

Fast and macro-capable, with a widely repeated caveat about micro-dynamics being masked by the sub-bass shelf. The bigger practical variable is drive: sources disagree on how much amplification it needs, from "considerably tasking" on a phone to "not super hard to drive" off a mid-range dongle.

Macrodynamic punch is well reproduced, as sudden drops in bass or crescendos maintain their dramatic nature.

Kazi Mahbub Mutakabbir, Headphonesty

Microdynamics are middling, as the excessive sub-bass masks low-level details and subtle shifts in volume.

Kazi Mahbub Mutakabbir, Headphonesty

the MP145 remains a true planar and will be considerably tasking with low-powered sources, like a phone

NanoTechnos, Headfonia
Measured

ASR measures sensitivity as "a bit low for an IEM but not the worst we have measured" with flat, low impedance, and concludes it should drive from many sources. Independently, vandung2510 found the later-batch unit about 1 dB more sensitive at a matched volume setting — a small real difference in the same direction as the easier-to-drive claims.

Comfort

Contested · 10 src

The single biggest complaint about the set, and the reason most "don't buy" advice exists. Two reviewers find the shells sit fine for long sessions; far more report them as too large, wide-nozzled and tiring after a couple of hours, with the stairstep faceplate's sharp edges drawing owner complaints up to and including injury. ASR separately found the wide nozzle made tip-swapping very difficult.

Measured

Hidizs specifies each earpiece at under 9.5 g (Headphonesty lists 19 g for the pair) — not heavy for metal shells, so the complaints are about size, nozzle width and edge geometry rather than mass.

Where it splits
big but livable — the shape follows the ear21%

the contours of the shell followed the shape of my ear with sureness which was a good sign that I could use it for long periods

Aldous, Headfonics
too large, sharp-edged and tiring — fit is a gamble79%

I’d even say the fitting and the size of the shells puts me off more than the retuning itself.

vandung2510, Head-Fi

Build

Moderate · 8 src

Broadly excellent: an all-aluminium CNC shell that even the harshest reviewers call premium. The disagreement is in the details — the stairstep faceplate's sharp edges, the flush 2-pin sockets, an easily chipped hard case, plastic packaging on an environmentally-themed product, and a stock cable several reviewers think is below the price.

great build and solid shell

NanoTechnos, Headfonia

The stairstep pattern adds some flair to the design and makes the MP145 stand out, but the edges are sharp and can be uncomfortable.

Kazi Mahbub Mutakabbir, Headphonesty

The edges are extremely sharp for an IEM.

David, verified purchase, Amazon

There are no annoying edges to worry about.

Suman Sourav Meher, The Headphone List

Isolation

Strong consensus · 3 src

Adequate rather than a strength. Two sources call it good or above average; one calls it enough for background noise but not class-leading. The shell carries two vents, which is also why nobody reports pressure build-up.

Isolation is above average due to extra venting on the shell.

Kazi Mahbub Mutakabbir, Headphonesty

The isolation of the MP145 is enough if you’re looking to hush out noise coming from the background.

Aldous, Headfonics
Measured

Hidizs' own spec sheet claims up to 25 dB of passive isolation — a maker figure, not an independently measured one.

Value

Contested · 10 src

A large majority still treat it as one of the strongest planars near $160, several calling it the best under $200. A real minority declines to recommend it — on accessories and fit, and on the quiet mid-life retune. Amazon's rating tail is the most honest picture: mostly fives, with about one review in seven at one or two stars.

Where it splits
still a benchmark at the price81%

I am going to recommend the Hidizs MP145 IEM especially when used with a bit of EQ.

amirm, Audio Science Review
undercut by accessories, fit and the quiet retune19%

for €150 this cable and the box do not seem to me to be up to par, I can think of several headphones that make better use of our money

PROblemdetected, Head-Fi

Best for

  • Listeners who want a deep sub-bass shelf with planar speed rather than mid-bass slam.
  • Detail and separation seekers around $150 who will feed it a real dongle or player.
  • Gaming and film, where the imaging draws praise from nearly every source.
  • Anyone happy to fine-tune by nozzle or EQ — ASR's verdict improves markedly with a shelf and a treble lift.

Skip if

  • You have small ears, or you can't return them — these are unusually large shells with a wide nozzle and sharp faceplate edges.
  • You want a mid-forward, vocal-first tuning; several reviewers hear male vocals set back.
  • You want top-octave air out of the box, without EQ or the silver nozzle.
  • You need guaranteed unit-to-unit consistency — later runs measurably differ from launch pairs.

At a glance

Consensus
72 / 100weighted mean across 17 sources — an aggregate, not a single verdict
Type
IEM
Sources
17 · 6 classes
As of
2026-07-30
Owner rating
4.1/5 · 55self-selected — skews high
Sources17 reviews across 6 classes. Weight reflects expertise × independence; echoes collapsed.
  1. s1Hidizs MP145 IEM ReviewAudio Science Review (amirm)Measurement2023-12-02w1.00
  2. s2Hidizs MP145 ReviewHeadfonics (Aldous)Editorial2023-09-06w0.95
  3. s3Hidizs MP145 Review – Better Late Than NeverHeadphonesty (Kazi Mahbub Mutakabbir)Editorialaffiliate2023-11-06w0.85
  4. s4Hidizs MP145 ReviewHeadfonia (NanoTechnos)Editorialunknown2023-12-07w0.80
  5. s5Hidizs MP145 review: The One to GetThe Headphone List (Suman Sourav Meher)Editorialunknown2023-10-11w0.80
  6. s6Hidizs MP145 Different BatchesHi End Portable (cqtek)Measurement2024-09-15w0.90
  7. s7Hidizs MP145 Old vs New: Did Hidizs retune or change the driver?Head-Fi (vandung2510)Measurement2024-08-04w0.90
  8. s8Hidizs MP145 — raw IEC-711 frequency response exportpw.squig.linkMeasurementw0.85
  9. s9Hidizs MP145 and MP145 (new) — raw IEC-711 frequency response exportskazi.squig.linkMeasurementw0.85
  10. s10HIDIZS MP145 — all Reddit reviews, aggregated (69% positive of 81)RedditRecsCommunityaffiliate2026-07-30w0.80
  11. s11HIDIZS MP145 — showcase reviews (31)Head-FiCommunityw0.80
  12. s12no*SOUND presents… a HIDIZS MP145 review (3.50/5)Head-Fi (PROblemdetected)Critical2024-04-14w0.85
  13. s13Hidizs decided to silently change the tuning of the MP145, NO REC, NO MODShortbus AudioVideo2024-01-23w0.80
  14. s14Hidizs MP145 tuning changed.r/iemsCommunity2024-01-25w0.70
  15. s15Hidizs MP145 — owner ratings (4.1/5 from 55)Amazon USOwnerw0.70
  16. s16HIDIZS MP145 product page and owner reviews (4.69/5 from 85)Hidizs official storeOwnersponsoredw0.40
  17. s17Hidizs MP145: A Planar Tsunami or Just Another Oversized IEMAudiophileSpotEditorialaffiliate2025-03-19w0.15

Limitations & method

Consensus-of-sources synthesis · as of 2026-07-30 · not a measurement verdict or ground truth.