Hidizs Mp145 Pro: The Whale 🐋

Pros:

• Holographic soundstage
• Clean separation and accurate imaging
• Great detail retrieval on well-recorded tracks
• Love the premium accessories

Cons:

• Shell is big
• Sub-bass is polite and light, not for bassheads
• Female vocals can feel a bit distant and thin on peaks
• Treble can fatigue sensitive listeners

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Disclaimer: Everything written here is my own honest, purely subjective opinion fueled by nothing but genuine enthusiasm for the hobby. No bias just one egg's unfiltered take. I'm not an expert, just a girl who's still in her shell trying to crack this hobby open. Take it with a grain of salt.

Hidizs is founded by Tamson in year 2009. Hidizs has been releasing IEMs that are pattered or themed based on animals like MK12 Turris (The Immortal Jellyfish), MS2 (Rhino), MS3 (The Shark), MP143 (Salt: a famous humpback whale), MP145 OG (whale). Hidizs released yet another whale themed, modifying the original version to MP145 Pro: The Whale.

Hidizis partnered with Whale and Dolphin Conservation since 2023 on their very first whale designed IEM and the original MP145. Continuing their partnership up to this year 2026 for the MP145 Pro release. I personally love marine life. I had a dream before when I was a kid to just volunteer and go help the whales. With that said, I also love the idea of their advocacy to support an organization.   

The Unboxing:

The Package:

• Aluminum Version (Black, Blue, Gold), *Titanium Version (Gold Limited Edition)
• 14.5mm Ultra-Precision Nano-Grade Planar Magnetic Driver
• 3 Pneumatic Sound Tuning (Silver, Rose Gold, Red Nozzles)
• High-Hardness & Durability & 6N High-Purity SPC 4-Core Braided Cable
• Modular Interchangeable 3.5mm SE & 4.4mm BL Plugs
• Sea Anemone Premium Eartips, Stock eartips (Bass, Vocals, Balanced)
• Ocean Blue Leather Hard Case
• Hidizs x WDC Button Pin
• Instruction Manual
• Certificate of Conformity

​The Goods:

Hidizs did pack quite a substantial amount of inclusions. A big improvement on their modular cables and leather hard case. The cable is a 4-core braided cable, 1.6mm diameter per single strand of cable, creating about 5.5mm cable. I think most IEMs around this price range should keep up, providing modular cables for the users. Additionally, they also include premium sea anemone ear tips, which they also sell separately. 

Let’s talk about the shell. When you look at it as is, it got a whale tail design with pleats on the side. As per Hidizs, the pleat design came from a whale’s rorqual pleat as inspiration. The whale pleats are located underneath them, the throat area. It got the “Hidden Bionic Breathing Holes”. They patterned the design from the breathing hole or blowhole, letting the IEM breathe which you can notice it being wide staged, making this IEM a semi open vented. 

​The Comfort:

The IEM is quite large. It houses a 14.5mm planar driver and weighing in at 10g per IEM. The 2-pin connector area on the stock cable is quite long, pushing the ear hook beyond my ear and it’s nearly impossible to wear without falling off. The hook doesn't anchor properly on my ears so I have to adjust them from time to time. I ended up relying on my glasses to keep that section clipped in place, otherwise the IEMs would just keep falling off whenever I use them while walking. The one that saved this tiny whale’s life is the proper ear tips. With the right ear tips size, the seal holds well enough to help keep the IEM stable. However, my ears are on the smaller side, and this shell clearly wasn't designed for smaller ears with that in mind. Fit issues aside, I genuinely enjoy this IEM for what it does.

The Sound:

Note: I have tried wide bore (Divinus Velvet), narrow bore (Final E ear tips) and regular. I will be sticking to Hidizs Sea Anemone for my preference. Narrow bore works for well to enhance bass and lessen treble, but it made the soundstage a little intimate.

Nozzles: Tested with sea anemone

Rose Gold: Balanced and natural soundstage. Sparkly
Silver: Opens the stage wider than any of the 3. Bright and energetic. Slightly sibilant on higher frequency (noticeable fatigue)
Red: Boosted bass, lesser peaks. Lesser sibilance. Most intimate.

Note: The rating is based on how much sound frequency it produced, not my rating on the soundstage

Hidizs is known for their interchangeable nozzles. The difference is subtle. What affects the sound more are the ear tips that you use. My preference will be the red nozzle. Im highly sensitive to the treble. For a planar IEM, MP145 Pro is surprisingly very easy to drive. The volume I’m at is only at around 28-35. 

Sound Signatures:

The Bass:

The MP145 Pro highlights the quality of mid-bass while keeping sub-bass subtle and light. Tested with ZEZE by Kodak Black, Coming in Hot by Andy Mineo, Humble by Kendrick Lamar, and Can't Tell It All by Hulvey, KB, and Lecrae, this tiny whale can throw a punch while staying fast and dry in exchange for clarity. The deep bass hits in ZEZE hint at depth but fade abruptly like a fast swimming dolphin, a light touch rather than a sustained pressure. Sub-bass is there, but it's polite, giving you exactly the space you need.

Mid-bass feels more like a sidekick. It hits fast and clean yet carries a dry and thin texture, more of a friendly fist bump than an aggressive uppercut. It's tight and controlled. What it gives in return though is a clean and open low end that doesn’t bleed into the mids, keeping everything above it breathing freely. Even on Trance by Metro Boomin, known for its heavy atmospheric low end, the character stays consistent, tight, fast, and controlled.

All that said, the bass response of the MP145 Pro is not a bad thing. For listeners who feel fatigue from heavy, overpowering bass, this would be a great set.

The Vocals

The MP145 Pro is praised for its vocal clarity but sitting mid on vocal intimacy. It's never a boring IEM. I have tested with Fate of Ophelia by Taylor Swift and Jaded by Nyasia Chane'l, female vocals sit slightly distant, clear and airy but never truly intimate, with the planar sheen showing up on higher registers adding a touch of sharpness. Nothing Worth Waiting For by Frederick Leonard and Remember to Dance by Bruno Major show male vocals carrying more weight and presence, though still on the lighter side. In duets, Shallow by Bradley Cooper, Lady Gaga and Die For You by The Weeknd, Ariana Grande make the imbalance noticeable, male voices naturally take the lead leaving female voices a step behind.

Vocals here are genuinely fun, a little bright with that characteristic planar clarity and airiness keeping things lively and energetic, making every word crisp and easy to follow. I do notice a bit of fatigue from the sheen over longer sessions as I am sensitive to brighter IEMs, which I will touch on under treble. Not the most flattering vocal presentation, but one that keeps you engaged.

..and The Treble

If you are used to using dynamic driver and balanced armature IEMs, you will notice the brightness and sheen in the vocals section, quite different from both, and the unique sound you hear is coined the "planar sheen". The MP145 Pro's treble is a little bright for me. As mentioned, I'm a little sensitive to brighter IEMs but I like that MP145 Pro is never aggressive, warm overall with a planar character that shows up depending on the song and how it is produced. I used Snooze by SZA and As It Was by Harry Styles to test this and I notice occasional odd sharp peaks but sibilance stays airy and controlled. Also, cymbal shimmer decays naturally without sounding splashy or metallic which you can say that this planar driver is built good. We do not like synthetic and metallic sounding planar.

Sensitive listeners like me, will feel fatigue over longer sessions as the peaks accumulate over time. To estimate, around an hour of continuous listening to bright music like Kpop or Sabrina Carpenter's whole album, will trigger the fatigue, while Billie Eilish's dark pop genre would not. The upside though is detail retrieval, on well recorded tracks the MP145 Pro showers you with tiny glittering sounding details that lesser IEMs would simply smooth over, hide or tame. As for sibilance, I was able to use Earmen Gold L-amp MKII to smoothen sibilance and peaks on Sabrina Carpenter songs and we can’t be friends by Ariana Grande even more.

It's worth noting, this review, I used the red nozzle which already tames the upper frequencies and even with the red nozzle, I still find MP145 Pro a little bright on some tracks but fun. The silver nozzle pushes treble forward noticeably, making peaks sharper and brightness more prominent while opening the stage for your ears to hear. If you are treble sensitive like me, go for the red nozzle anytime of the day.

The Separation and Imaging:

For separation and imaging, I went with two very special recordings, And God Created Great Whales by Alan Hovhaness and the Wild Wet World album by Cosmo Sheldrake. Both feature real whale samples alongside other instruments, and the MP145 Pro handles them beautifully. Each whale call floats in its own distinct space, the layers of each frequency clearly separated, and the position of where the sound was recorded felt tangible and real. It is amazing how whales communicate, and hearing it from dry land through this tiny whale feels like swimming in a vast open ocean.

Separation is quite impressive, sounds stay in their own places without bleeding. Imaging is also something that highlights this IEM where it gives a holographic experience. You can accurately pinpoint the locations of each instruments naturally with ease. This openness is made possible by the vents, allowing the driver to breathe and create that spacious, airy presentation.

Layering is mostly realistic and natural sounding with a few odd moments there the layering seems off, making it a bit inconsistent or due to poor recording. The vocals may sound a bit pushed back especially female vocals as it thins out on peaks where it becomes airy. This would depend on the recording and how vocals are positioned in the mix, so the experience may be different

The Verdict:

MP145 Pro is a very good IEM, almost an all-rounder, neutral bright IEM. Wide staged little whale that can “swim” on the vast sea.  A little improvement on the size for the versatility of users’ comfort. Keeping the accessories or maybe even improving them would be great. It’s a little fun to test and try different nozzle whichever that suits the genre. I personally would use the silver nozzle for orchestra and classical music to maximize the soundstage to make the peaks more tolerable, rose gold for something more romantic, clean vocals, slow R&B, Indi Pop, maybe a little jazz and instrumentals too. Finally, the red nozzle for a tamed treble with a little bit boosted bass and warmer tone for rap, altpop and peaky female vocals. 

The Tracks:

• And God Created Great Whales – Alan Hovhaness
• Wild Wet World Album – Cosmo Sheldrake
• Nothing Worth Waiting for More – Fredrik Leonard
• Fate of Ophelia – Taylor Swift
• Bad Guy – Billie Eilish
• Remember to Dance – Bruno Major
• Demons – Imagine Dragons
• Am I Wrong – Nico & Vinz
• Slow Dance in the Dark – Joji
• Jaded – Nyasis Chane’l
• Little Things – Adrian Berenguer
• Die For You , The Weeknd, Ariana Grande
• Shallow – Bradley Cooper, Lady Gaga
• Trance – Metro Boomin, Travis Scott, Young Thug
• Nonsense – Sabrina Carpenter
• As It Was – Harry Styles
• Snooze – SZA
• we can’t be friends – Ariana Grande
• Can't Tell It All – Hulvey, KB, and Lecrae

The Gears:

• Fiio M21
• Earmen Gold L-Amp

The Price:
Range $170 - 190

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