HIDIZS MD4 – Review


HIDIZS MD4

| Quad Driver | 4x Tuning Switches |



🎧 We are reviewing the HIDIZS MD4, the fresh new in-ear monitors from HIDIZS.

The HIDIZS MD4 is a quad driver earphone featuring an all-balanced armature driver configuration and 3D printed acoustic tubes.

Probably the most notable spec from the MD4 is a 4 position dual-switch that allows sound tuning on-the-fly with 4 sound profiles:

  1. Balanced
  2. Warm
  3. Treble
  4. Bass

You can see later below in this HIDIZS MD4 review, the corresponding switch position for each tuning and you will also see the frequency response curves declared by the manufacturer.

This IEM is part of the upper-tier models from HIDIZS and like all products from the brand, the HIDIZS MD4 presents an outstanding build and very nice aesthetics, with the use of metal for the main housing and a stylish space-grey metallic finish – yet, we noticed some unpolished details on the paint of the MD4 but it is fair to note that our MD4 is a pre-production unit (you can see them on our photos throughout this review)

Details such as connectors and cable quality, are mostly inherited from the HIDIZS Mermaid MM2, with nearly the same cable with metal details and angled bi-pin connectors.

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HIDIZS MD4 Review

Tests & Scores


A

Accessories & Packaging

The HIDIZS MD4 comes with a plethora of accessories that include:

  • 3x vocal eartips
  • 3x bass eartips
  • 3x balanced eartips
  • 1x cleaning brush
  • 1x 2-pin cable
  • 1x leather case

We usually do not concentrate too much on the quality of the cases included with headphones but the case of the HIDIZS MD4 is one of the best looking and best built cases bundled for free with an IEM, even with better quality than cases included in other in-ear monitors with prices in the $400 tag.

gramophone-2566010/10


W

Weight

HIDIZS MD4 weight in Ounces and HIDIZS MD4 weight in grams.

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B

Bass & Sub Bass

Balanced:

Out of the box, bass on the HIDIZS MD4 while set to “balanced”, shows a nicely punchy bass with a fun effect that does not sound overly bloated as to “eat up” the whole sound signature.

On the other hand, some bounciness and loose issues were present.

gramophone-256607.75/10

Treble:

The difference between “Balanced” and “Treble” by applying the switch toggles does not seem to show a drastic difference as to be worth mentioning.

gramophone-256607.75/10

Bass:

Despite the “Bass” label, this switch setting does not apply any exponential bass-boosting effects neither over sub-bass, deepness nor reach. Yet, a bit of extra punchiness could be, arguably, perceived.

gramophone-256607.75/10

Warm:

A nice punchy mid-bass is still present with, probably, a bit of loss over deepness and reach on sub-bass.

gramophone-256607.75/10

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M

Mids & Vocals

Balanced:

According to our editor’s taste, the balance representation and tag might not be the best fit to the sound signature tuning with this switch position.

In general, lower mids showed a very full sound with deep male vocals but with noticeable mid-bass bleed that congested the lower midrange on bass-heavy moments.

Upper mids were noticeably more forward and cleaner than their lower mids, where female vocals and higher mid-pitched notes cut-through but risked to become a harshy and shouty at times.

gramophone-256607.25/10

Treble:

This switch settings offer a way cleaner overall midrange, with a much improved placement of vocals that do not need to compete with a loose mid-bass.

Male vocals keep benefiting from a full and deep reaching sound but can exhibit a bit laid back presence and can tend to get overshadowed by female vocals.

Higher mids, unfortunately, get palpably hotter and substantially harsher.

gramophone-256607.5/10

Bass:

Despite the label, this switch setting keeps showing a less bloated bass effect than the other switch settings, allowing their lower midrange to probably offer the best sounding tuning of all switches.

Lower mids and male vocals now sound a bit cleaner and exhibit even less bleed and congestion from mid-bass, while not sounding too laid back.

Upper mids, also, get a bit smoother presenting a lower chance of becoming harsh – yet, it still showed harshness on shouty vocals and hotter peaks.

gramophone-256607.5/10

Warm:

The switch option showed a mixed effect in between “Bass” and “Balanced”

gramophone-256607.5/10


H

Highs & Treble

Balanced:

On this switch setting, the MD4 offers a good balance of brightness and detail.

On the other hand, the hot peaks seen on the MIDS & VOCALS section show similar tendency over the spikes related to piercing peaks.

Despite this, the MD4 does not suffer from too much sibilance.

gramophone-256607.25/10

Treble:

A clear boosting of the upper highs and treble is noticed.

A perceivably freedom of a darkish layering is offered when using this switch but this will have a price to pay: stronger fatiguing peaks.

gramophone-256607/10

Bass:

This mode shows some loss of brightness and detail but in return, their highs will sound noticeably more agreeable with piercing peaks and sibilance kept under control.

gramophone-256607.25/10

Warm:

A much cleaner and ironically, less warm highs and overall sound signature is present with this switch setting.

To the benefit of their highs, their presence gets a lesser feel of congestion.

Nonetheless, highs keep sounding hot and fatiguing with frequent and intense piercing peaks.

gramophone-256607.25/10


SL

Sound Leak

The sound leaking out of the HIDZS MD4 is slightly less hearable than most normal headphones, still this is not a model that could be rated as totally silent nor well-adapted for in-library usage – people thinking to daily commuting with the MD4 will not have issues.

gramophone-256607.5/10

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SI

Sound Isolation

With a deep and tight fit, the MD4 offers also a very good passive sound isolation with a performance noticeably better than most average earphones on the market.

gramophone-256608/10

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C

Comfort

The earpieces of this HIDIZS model have a smooth design with gentle edges that never become pointy nor pain-inducing.

Overall, the team found the MD4 to be a very comfortable in-ear monitor that can be used for hours before introducing any fatigue.

gramophone-256608.5/10

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EQ

Response to Equalization

With 4 tuning switches profiles and 9 pair of tuning eartips, the HIDIZ MD4 is hard to beat in the retuning department.

Showing palpable sound differences using the switches, the HIDIZS MD4 could be rated as “exempt of EQ needs” to retune the sound signature; still, trying to recover the hot highs was never an easy task by any EQ applied.

gramophone-256607.75/10

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Frequency Response (raw)

HIDIZS MD4 Frequency Response Curve

 

Blue= Balanced, Green= Treble, Orange= Bass, Red= Warm

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HIDIZS MD4 Technical Specifications

Specifications

TypeQuad driver
Driver Unit4x BA
Sensitivity102dB/mW
Power Capacity3mW
Impedance8 ohms
Frequency Response20-40,000Hz
DiaphragmN/A
Tuning SwitchYes, 4
CordY-type, 2-pin
Cord Length1.2m
PlugStereo mini plug
WeightApprox. 14g
Supplied Accessories9x Earphone tips, brush, cable, case

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Scores Scores

HIDIZS MD4 Scores


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HIDIZS MD4

8

SCORE

8.0/10


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