An updated version of the first THOR model ever designed.

    12.56mm Fusion Diaphragm Dynamic Driver IEMs
    Thunderous Bass, Brilliant Sound Details
    3D Designed Acoustic Chamber
    Unique And Bespoke Manufacturing
    High-Resolution Custom Silver-Plated OCC Copper Cable
Regular price €399,00
Sale price €399,00 Regular price

About THOR

Driven by passion for audio rather than business growth, THOR has released only a handful of DIY-designed models - all of which have garnered praise from the few who have been able to get their hands on the limited releases. Every product is individually handcrafted and are available in limited stock. With a vision for paramount sound quality and bespoke character, THOR is committed to hand crafting each earpiece in small batches and continually innovating the field of in-ear monitors.

The Mjölnir MKII is the updated follow up to the first THOR model ever designed. Keeping in line with the original Mjölnir’s DNA, the Mjölnir MKII is a single dynamic driver in-ear monitor (IEM) specifically engineered to bring the best bass response in the industry.

The Mjölnir MKII features a never-before seen custom 12.56mm Fusion Diaphragm dynamic driver. The Fusion Diaphragm is a composite of DLC (diamond-like carbon), PEEK (polyetheretherketone), and PU (polyurethane) materials. Each of these membranes have been popular in the industry for their acoustic performance, but by combining them, the Fusion Diaphragm is able to harness the most optimal potential of each material. The DLC’s stiffness was selected to produce an incredibly punchy sub-bass impact, while the PEEK’s incredible thinness and responsiveness allows smooth and detailed mid-frequency playback. PU is not often used as a standalone material, but in composite settings, can provide beautifully sparkly treble that is airy and refined, with the added benefits of being easily tunable.

All of these components put together with an extremely powerful magnet capable of 1.6T of magnetic flux, the Mjölnir MKII makes for an exceptionally well-layered and coherent listening experience. With one of the most powerful bass response in the industry, the layers of separation between each instrument and frequency response still allows a refined and professional playback, suitable for stage bass guitarists and drummers.

The tuning of the Mjölnir MKII relied more on the internal acoustic chamber design rather than typical dampening strategies used by dynamic drivers.

The acoustic chamber was 3D printed with a front micro-vent for pressure relief, reducing changes to the sound curve among dynamic driver IEMs often induced by internal pressure buildup. The rear acoustic chamber is also precisely designed to exact dimensions, and is fitted with a replaceable Knowles dampening apparatus, which is used in balanced armature drivers. This design allows for pressure relief, but also allows the user to change the rear dampening level by switching out the apparatus. The bass response can thus be effectively tuned to the needs of the user.

The original Mjölnir was only available as a 100 unit limited release, and sold out almost instantly.

THOR is made up of only a singular engineer who hand builds each unit as a DIY hobby during their freetime. Thus, each product is guaranteed to be unique and bespoke. It is a dedication and care for each specific unit that is rarely seen in the audio industry. The Mjölnir MKII will also only be available in limited stock.

Replaceable Cable

The Mjölnir MKII comes equipped with a high-resolution custom silver-plated OCC copper cable that is replaceable. This allows the switching of cables to best fit the sound preference and comfort of the user, as well as ensuring the longevity of the IEM.

Inside the Box

  • 1 x THOR Mjölnir MKII
  • User Manual

1 Year Warranty

The THOR Mjölnir MKII Comes with a 1 year warranty on the In-Ear Monitors and 3 month warranty on the cable.

Technical Details

Driver :
12.56mm Fusion Diaphragm Dynamic Driver
 Custom Silver-Plated OCC Copper
≤0.78mm 2pin
Frequency response range:

Authentic Products

Linsoul Audio is the authorized distributor. All products are authentic and genuine.

Worldwide Free Shipping

We are located in China but send our products worldwide for free. T&Cs apply.

1 Year Warranty

We provide 1 year warranty for the all products except the cables and accessories*.

Online Support

Need help?, we are here to assist you
Monday - Friday: 09:00 – 18:00 (UTC+8)

Customer Reviews

Based on 6 reviews
Mátyás Móricz


Italo García Olortegui

Excellent, I have several iems and the THOR Mjölnir MKII is one of my favorite headphones.

Amazing single DD IEM Highly recommended!

Amazing IEM, very wide stage, detailed, crisp but at the same time not overly exaggerated in the upper mids, smooth and balanced. Nice sub-bass and mid bass, lots of punch and texture very refined, not bleeding into the mids but just supporting them for texture and weight. Nice cable as well with amazing sonic characteristics. Could be swapped later for a Fiio silver-plated cable. Recommend only silver plated OCC single crystal cable. It will do magic.

Mark Horvath
Thor Mjölnir MKII

I really like the Mjölnir MK2. It has awesome bass as it is advertised. The mid and highs are great too. It's not harsh, fun to listen.

The New Mjolnir MKII

Having received the new iem expectation on how good it would be is a reality…The advertisement is everything that they say about this product… Beautiful and Comfortable, this iem will play anything you want it to by perfection… In all frequency response ranges.I would recommend this product to any and all who are looking for the perfect earphone to get when you’re searching for the product that will exceed your past experience with other iems in a way that they become a thing of the past ! Hearing these new earphones has left me with the fact that they won’t be easily replaced for a long time at any price. In my book , 10 out of 10 , checks all the boxes in regards to accurate playback of all music !


The lower mids and bass on this is so rich, so tangible & substantial. If you want to feel your music in a visceral, corporeal sense - this is your guy. At the same time, the rest of the frequency response is actually balanced and unproblematic. No erratic treble or strong V-shape here. Just elevated bass and lower mids, like a tastefully done L-shape. It has great extension in both ends and very commendable detail and resolution. It's definitely somewhat pricey for a single DD but the sound is luxurious and mature enough to warrant the expense imo.

Beautiful shells and good fit to boot.

Glad to be an owner of this special, limit run set.

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