Which Unique Melody IEM Should You Choose? The Range Compared

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Key Takeaways

Which Unique Melody IEM should you choose? There are twelve in the range now, running from a single-driver model at £179 to a 13-driver flagship at £7,649, and names like MEST, MEXT and 2HT tell you very little about how they differ. Most reviews cover one model at a time. We have put all twelve in one table and sorted them by what you want from a pair.

At Bollsen, we are a family-owned earplug company and the official UK & EU partner of Unique Melody. We did not measure these monitors ourselves. Every spec below comes from our product pages, and where Unique Melody publishes no figure, we say “not stated”. If the category is new to you, start with what are in-ear monitors, and for the wider buying criteria (fit, source and budget) read how to choose in-ear monitors in the UK.

One honest point before the table. In our view, returns shrink fast once you pass roughly £300. Higher up, the extra money buys different driver types, finer shells and a different tuning, not a sound that doubles in quality with the price.

What does the Unique Melody range look like?

The current Unique Melody range has 12 in-ear monitors, from £179 (From The Start) to £7,649 (Mason FS) for universal fit, with 1 to 13 drivers per side, bone-conduction drivers on eight models, electrostatic drivers on five and Custom Fit on six.

Prices are in GBP and include UK VAT. Where a row shows two prices, the second one is Custom Fit, which is always £300 above universal. The impedance and sensitivity column only shows figures that Unique Melody publishes.

Shells are half the appeal of this brand. On our gallery page you can see the range in pictures up close.

BA means balanced armature and EST means electrostatic. If any of those letters are new, our guide IEM driver types explained covers how each driver family works. Here we stick to what they mean for choosing.

One product sits outside the table on purpose. The Umbral open-back headphones (£5,399, 99 numbered units) are the one open-back headphone in the range, built around a 96 mm planar driver and a MEMS tweeter, so they belong to a different decision altogether.

Which Unique Melody IEM should you buy first?

For a first Unique Melody, look at the four universal-fit models under £750: From The Start (£179, one dynamic driver), 2HT (£279, one dynamic plus one balanced armature), 3DT (£359, three dynamic drivers) and Stardust (£719, six drivers in a titanium shell).

From The Start is the cheapest way into the range, with a single dynamic driver rated at 23.8 Ω and 106 dB in a translucent blue resin shell with a hand-painted faceplate. The catch is its 4.4 mm balanced plug only, so a phone needs a 4.4 mm dongle.

The 2HT pairs a 10 mm dynamic driver with one balanced armature in a CNC-machined stabilised wood shell and ships with a 3.5 mm plug, so it works straight from a laptop or a phone adapter. Crinacle’s In-Ear Fidelity IEM rankings sum it up as “Well tuned with strong technical performance.” Unique Melody does not state its impedance or sensitivity.

The 3DT is all-dynamic: two 7 mm drivers plus a 10 mm carbon nanotube driver per side, rated at 25.4 Ω and 113 dB, also in stabilised wood with a 3.5 mm plug. Jürgen Kraus at audioreviews.org called it one of the rare “Can’t-Go-Wrong” products, while listing “short nozzles/potential fit issue, mediocre cable” among its cons.

The Stardust is the step up. It has two dynamic drivers and four balanced armatures on a 4-way crossover, a 3D-printed titanium shell, an impedance of 11.7 Ω and a choice of 3.5 mm, 4.4 mm or 2.5 mm plugs. Unique Melody does not state its sensitivity.

Whichever you pick, give the fit a fair go first. If a new pair sounds thin, suspect the fit before the tuning. Try every tip size in the box first, especially on the 3DT with its short nozzles. These four are real end points, not just stepping stones.

Want bass you can feel?

Then look at the eight models with a bone-conduction (BC) driver, a driver that vibrates the shell against your ear rather than moving air: MEXT, MEST MKII, MEST MKIII CF Blue, MEST Jet Black, Maven III Moonshard, MEST Fortune, The Multiverse Mentor and Mason FS. Each one uses a different BC design.

• MEXT: one OBC coil, stated band 200 Hz–7 kHz
• MEST MKII: a dual-sided BC driver
• MEST MKIII CF Blue: a silver-palladium piezo, stated band 500 Hz–16 kHz
• MEST Jet Black: three BC drivers, two composite and one piezo
• Maven III Moonshard: two BA-type BC drivers
• MEST Fortune: three hybrid BC drivers for low, mid and high
• The Multiverse Mentor: a frequency-shift piezo
• Mason FS: the BC-Turbo Micro Booster (frequency-shift)

These are drivers inside a sealed in-ear shell, which is a different thing from the bone-conduction headphones that sit in front of your ear. Where the band is stated, it tells you which part of the range the BC driver works on. The MEXT’s coil covers 200 Hz–7 kHz, and the MKIII CF Blue’s piezo covers 500 Hz–16 kHz. For the mechanics, see our guide to bone-conduction drivers in IEMs.

The MEXT is the cheapest way to try it, at £989 universal, with one dynamic driver, four balanced armatures and one BC coil in an ergonomic resin shell (16 Ω, 108 dB, 20 Hz–23 kHz). Paweł Szachno at Ear Fidelity wrote that it gave him “the most physical, epic bass response I’ve ever heard in an IEM”, and said that, held in the hand on bass-heavy tracks, the shells feel like “a haptic engine”.

That is one reviewer’s experience, not a promise. The same review warns that with shallow insertion “the vibrating part on the shells won’t have enough surface contact with your ears”. Ear Fidelity’s caveat suggests how much you feel depends on how the shell sits.

Want air and treble?

Five models add electrostatic (EST) drivers, tiny supertweeters that handle the top octaves: two each in the MEST MKII, MEST Jet Black and MEST Fortune, and four each in the MEST MKIII CF Blue and Maven III Moonshard. Every one of those five also carries bone conduction.

The MEST MKIII CF Blue packs ten drivers per side on a 5-way crossover: one dynamic, four balanced armatures, four ESTs and a silver-palladium piezo BC driver. It is rated at 14 Ω with a stated range of 20 Hz–70 kHz, comes in a Cobalt Blue carbon fibre shell with all three plug options, and costs £1,729. Its product page calls it “the most balanced MEST”.

The Maven III Moonshard goes further on driver count: 12 per side, with two dynamic drivers, four balanced armatures, four ESTs and two BA-type BC drivers. The shell is polished metal with an engraved Moonshard faceplate, the plug is 4.4 mm balanced only and the price is £1,979. Unique Melody does not state its impedance or sensitivity. It replaces the retired Maven II.

Four ESTs do not automatically mean more treble than two. The count tells you how a model is built, while the tuning decides how bright it sounds. The MKII, MKIII CF Blue and Jet Black all state a range up to 70 kHz, well past what anyone hears, so read that figure as reach, not quality.

Which MEST should you choose?

The MEST family has four current models, and our MEST MKII page sums up three of them: “MKII is the fullest and most cinematic, with the most sub-bass. MKIII CF is the most balanced and vocal-friendly, with relaxed treble. Jet Black is the most technical, with the best staging and imaging.”

The MEST MKII is the way in, at £1,349 universal. It has eight drivers per side (a 10 mm dynamic, four balanced armatures, two ESTs and a dual-sided BC driver), 12.3 Ω, 112 dB and a carbon fibre shell with gold foil. If you want the most low end in the family, this is the one.

The MEST Jet Black (£1,799 universal) has ten drivers, three of them BC, in a zirconia ceramic shell with an aluminium faceplate, rated at 12.6 Ω and 106 dB. Audiophile Heaven called it “a true generalist, master of all.”

The MEST Fortune (£2,429 universal) sits at the top of the MEST family. It has ten drivers with three hybrid BC drivers split into low, mid and high, a stated 10 Ω and 107 dB, a Purple or Red shell and a 4.4 mm plug only. Our Fortune page describes it as “Airy, detailed, deepest stage”, summarised from independent reviews, and notes that reviewers differ on whether it leans warm or bright.

Marcus at Headfonics reviewed a made-to-measure Fortune and heard “a natural level of depth, warmth, and sparkle”. Set against the Jet Black, he found the Fortune “a far more saturated sound”, and the Jet Black “the more neutral and controlled of the two sound signatures with a more pointed vocal presence”.

So the MEST line is not a ladder. These are differences of flavour rather than rank, so pick the description that sounds like your music.

Want a custom shell?

Six Unique Melody models can be ordered with Custom Fit, a shell moulded to your own ears: MEXT £1,289, MEST MKII £1,649, MEST Jet Black £2,099, MEST Fortune £2,729, The Multiverse Mentor £4,349 and Mason FS £7,949. That is always the universal price plus £300.

Here is how it works. When you order, we email you our 3D-scan guide, and a hearing specialist near you takes a 3D ear scan or ear impressions, which is usually charged separately. Your pair is delivered 3–4 weeks after we receive your scans, with a free refit if the fit is not right. Because each pair is made to order, there is no change-of-mind return on Custom Fit.

The other six models in the range are universal fit only. Whether a moulded shell is worth £300 and the wait depends on how long you wear your monitors and how well universal tips suit you, and our guide to universal vs custom IEMs weighs that up.

Which plug should you order?

Order the plug that matches the socket you will use most: 3.5 mm for a standard headphone jack or adapter, 4.4 mm balanced for dongle DACs and players with a 4.4 mm balanced output, and 2.5 mm balanced only if your player has that socket.

Five models give you all three options: Stardust, MEXT, MEST MKII, MEST MKIII CF Blue and MEST Jet Black. Another five come with a 4.4 mm balanced plug only: From The Start, Maven III Moonshard, MEST Fortune, The Multiverse Mentor and Mason FS. With those, a phone needs a 4.4 mm dongle DAC, as our product pages point out. The 2HT and 3DT ship with a 3.5 mm plug.

You rarely need a big amplifier. Stated impedances run from 10 Ω (MEST Fortune) to 25.4 Ω (3DT), and stated sensitivities from 106 to 114 dB, which is why our MEST MKII page says a good phone dongle or music player will drive it. For a socket-by-socket breakdown of which plug to order, see our plug guide.

What do the flagships above £4,000 add?

The two flagships, The Multiverse Mentor and Mason FS, both use 13 drivers per side (12 balanced armatures plus one BC driver on a 5-way crossover), with frequency-shift bone conduction and a 4.4 mm balanced plug. Neither uses a dynamic driver or ESTs, which makes them a different design rather than simply a bigger MEST.

The Multiverse Mentor (£4,049 universal) has a frequency-shift piezo BC driver, a carbon fibre shell with a ceramic inner frame, and is rated at 22 Ω and 114 dB with a stated 20 Hz–40 kHz.

Mason FS (£7,649 universal) uses the BC-Turbo Micro Booster, a CNC-carved, hand-finished shell in two editions, 23 Ω and a stated 20 Hz–40 kHz. Unique Melody does not state its sensitivity.

At this level you pay for craft, materials and an all-BA tuning with a BC layer. If you love what a MEST does, a flagship is as much a sideways step as an upward one.

What do you get when you buy in the UK?

Every Unique Melody model is sold on pre-order through Bollsen, the official UK & EU partner, with UK VAT included in the price. Universal-fit pairs ship free to the UK and EU by DHL Express in 5–7 working days.

Every pair carries a 2-year BOLLSEN warranty. Universal-fit pairs can be returned within 14 days as long as the hygiene seal is unbroken. Custom Fit pairs are made to order, so they follow the process above, with a free refit if the fit is not right.

So which Unique Melody IEM should you choose?

Start with your source and your budget. On a 3.5 mm source, the 2HT or 3DT is a strong first pair, and From The Start suits you if you already own a 4.4 mm dongle. If you want felt bass, look at the eight BC models, starting with the MEXT. For extra air, try the EST models, and if you are torn inside the MEST family, choose by flavour rather than price.

If you wear your monitors for hours, one of the six Custom Fit models may be worth the £300. When you are ready to compare photos, prices and options, shop the Unique Melody range on our in-ear monitor page and order the plug that fits your setup.

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Timotej Prosenc

Content & Digital Marketing Manager at BOLLSEN at Bollsen

Timotej Prosenc is the Marketing Manager at BOLLSEN Hearing Protection, where he leads the company’s SEO strategy, content creation, and email marketing initiatives. With a background in journalism and sales, Timotej brings both storytelling skills and commercial insight to BOLLSEN’s mission of promoting healthier hearing.

His connection to hearing protection stems from personal experience with sound sensitivity during live events and work in noisy environments, an issue that made him more aware of the long-term risks of unmanaged noise exposure. Today, as both a communicator and a user of BOLLSEN products, he is passionate about raising awareness around the importance of proactive hearing care.

At BOLLSEN, he develops data-driven marketing campaigns, writes SEO-focused articles, and manages communication channels that connect customers with practical knowledge about hearing protection. His work ensures that BOLLSEN’s message—prioritizing health, performance, and sustainability reaches a global audience in an engaging and trustworthy way.

Passionate about writing since childhood, Timotej combines creativity with a strong analytical approach, continuously testing new ideas in digital marketing, performance advertising, and social media. He believes in learning through innovation and collaboration, balancing leadership with openness to new perspectives.

Beyond his professional role, Timotej is committed to a healthy lifestyle and finds inspiration in fitness, sports, and quality time with friends. His personal passion for well-being aligns with BOLLSEN’s core values, making his work not only a career but also a cause he deeply believes in.

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