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Home ยป Theaudio Monarch Mkii: The Most Stunning & Powerful Earphones

Theaudio Monarch Mkii: The Most Stunning & Powerful Earphones

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The Thieaudio Monarch MkII has built upon a great deal of what made the first Monarch earphones a runaway hit. Its review explains how Thieaudio exceeded expectations with this eagerly awaited release, arguably producing the greatest earphone on the market.

An audiophile monitor-style earphone with tribrid drivers is called the Monarch MKII. The sound is produced by a combination of dynamic drivers, balanced armatures, and electrostatics. All of this technology is housed in a stunning new body, and the accessories are as innovative. Find out why we chose this as our best earphone of the year for 2021 by reading the remainder of our in-depth assessment.


One of the most exquisite earphones we have ever evaluated at AudiophileON is the Thieaudio Monarch MKII.

The Thieaudio Monarch MKII is currently available for direct purchase through Linsoul. To see the earbuds, the current price, and other details not covered in this review, visit their website by clicking here.


The Thieaudio Monarch MkII’s package isn’t particularly impressive. It has a straightforward black cardboard box with a jewelry-style presentation and an outer sleeve, which is similar to the design language of the company’s more expensive and less expensive versions.

I adore being astonished when I spend so much money. The Kinera Skuld’s unboxing is a unique experience, and many other IEM manufacturers are aware of the benefits of offering an engaging unboxing. Maybe Thieaudio should take notes and up the awe factor a bit.

I don’t want to imply that it was a bad experience. Simply put, the earbuds are so distinctive that they need a little more polish than their mid-priced competitors to set them apart as a more upscale item.


This adjustable cable is included with the Thieaudio Monarch MKII for usage with a range of high-end audio sources.
The Thieaudio Monarch MKII’s modular cable allows users to quickly switch between various connections.

Unfortunately, I wasn’t thrilled with the box’s accessories. There aren’t as many eartips available as normal, and I imagine that’s because it’s difficult to find any with a diameter that matches the IEM’s nozzle. Eartips have a big impact on the sound. Although you can insert aftermarket tips like those made by Azla of Final, I wouldn’t suggest it because the sound quality suffers.

The bundle gives you two choices. I discovered that a comply-style foam made the highs’ glitter lessen along with the sub-bass. The stock silicone tips, however, delivered the finest audio performance and a solid fit.

The only item you receive in the box, other than suggestions, is a plain carry case with the Thieaudio logo slapped on top. Numerous unique accessories, including a carry bag made specifically for each earphone, are available from brands like Campfire Audio. Therefore, I believe Thieaduio has cut corners (which is acceptable if brands do so to keep the price of IEMs low).

It was simple to fit the Monarch into the travel case, which is a reasonable size and has room to spare for a tiny DAP/DAC/Amp.


When we reach the earbuds themselves, things improve. One of the most exquisite earphones to be released this year, if I may say so.

The Thieaudio Monarch Mk2 has a lovely, large resin body. It is faultless in terms of tolerances and seamless. Instead of continuing with the plastic casing, they have chosen to use a metal nozzle.

As resin and acrylic are easily chipped by misuse and abuse, it greatly increases their durability. The norm for Thieaudio IEMs during the past few years has been 2-pin connectors. Using a flush-mounted system once more without covering a recessed port or QDC wire is their choice.

As I previously stated, the Monarch MK2’s quality is deserving of its expensive price, but its faceplate is really where it shines. It is quite beautiful.

Every set of Monarch MkII is different in terms of the faceplate. It has a scorched copper appearance with canyons and cracks that reflect light, making it a striking item for the hand and ear. It has depth, and the more I study it, the more I want to be in love with it. It is unquestionably deserving of serving as the brand’s flagship because it is so understated but elegant.


The cable is likewise fantastic, and readers of Audiophile On know how passionate I am about cables. A poor cable can make it difficult to use decent earphones. When writing product reviews, I’m constantly hesitant to mention the additional cost of purchasing an upgraded cable. That won’t be necessary here. It is damn near flawless.

I don’t particularly like cord cable designs. But this one is basically the same as the one that was used on the NiceHCK Topguy. The connector system is where Thieaudio made improvements. Why not join the trend and do it better than Dunu? Modular headphone cables are currently all the rage. Although I wouldn’t say it is better, this replaceable system is simpler to utilize.

The advantage of such a cable is that it makes switching between different source devices (Amps/DACs/DAPs) simple. As a result, the earphones’ two-pin connectors last longer. It’s an adaptable and straightforward approach, and the plug-and-play method used here is basic and clear.


The Thieaduio Monarch MKII has brought me more delight than any other earphone I’ve used in the previous 12 months. It is one of those IEMs that will make you wonder what direction we can take next. You can’t stop hearing how amazing the sound is; you keep wanting more. It prompts you to review and go through your whole music collection. In a pastime where buyers’ remorse is real, it helps you to feel better about spending full price for items. It is top tier in my opinion; it has a few rivals but is not outdone.

What gives them such a great sound? It depends on a number of variables, but tuning is the most crucial one. In my opinion, Thieaudio currently has the best staff of engineers working on fine-tuning their earphones. The company consistently produces hits and hardly ever introduces a product that isn’t successful with the proper customer.

These have the best tune I could ever ask for. a blend of sub-bass rumble, mid-bass clarity, a tonally accurate and wide middle, and smooth, fine-grained treble. This earpiece is amazing and truly unique.


During the evaluation process, I put the Thieaudio Monarch MKII and Ibasso DX300 DAP to the test.

Impact and transparency are difficult to balance. A sound can impress for a variety of reasons. The MK2 can dazzle thanks to its capacity to present a genuine tonality while remaining unclouded and allowing the listener to savor every nuance. The MkII’s separation and image capabilities are just astounding.

I never felt like I was missing anything, but I also never felt overloaded. I liked how the instrumentation was unified but distinct and simple to isolate as needed. I find that certain parts of a musical passage catch my attention. After that, it is forgotten, and you are returned to the medley.

A hint of warmth – The Mk2 is by no means what I would describe as a warm headset. However, there is just enough to keep you interested and to give some tracks intimacy and connection. Male vocals repeatedly demonstrate this, demonstrating weight and roughness.

The decay is superb; both spacing and treble can produce a soundstage. Nothing, in my opinion, makes music sound more organic than a good note decay. The IER-Z1R or the original Campfire Audio Solaris are even better than the Monarch MKII in this regard. Triangles are an excellent example, but you’ll also hear mid-bass instruments in this. A triangle strike doesn’t just stop working right away. As expected, it hovers for a brief moment before gently disappearing. Beautiful.


Although this has a powerful sub-bass response, it is not as powerful as the original Monarch we compared it to for this review. When necessary, it can hit very forcefully, but it lacks the original’s tremendous power. Although more sophisticated, it can still play basshead music. I appreciate that they tightened things up in this area while being quite consistent.


There is also less of a jump to the midrange frequencies, and the midbass is much more detailed and controlled. It’s a smoother transition, and it aims to release the mid-bass detail I love to hear. This IEM is really well-balanced; I couldn’t hear any bass bleed in the midrange.


We must discuss detail, lots and plenty of information, in this area. You always have it in front of you. Smooth and pleasant, it sounds natural and lacks the harsh metallic sound you could hear on less expensive BA headphones.


Smooth but pushed forward along with the mids is the treble. That might be difficult to understand, but in my opinion the treble is extremely simple to understand and never goes to sibilant terrain. Even though it works so well and is quite non-fatiguing, you still receive a lot of clarity and detail.


The soundstage is only somewhat sized. There are headphones with more expansive apparent soundstages, such as the Solaris and IER-Z1R. (probably as they both push the treble a little more). As I already stated, it is still very much on the huge side, and the deterioration and separation have made it even larger.


Yes, I am aware that some dislike reviews that are overly positive. Nothing about the Thieaudio Monarch MKII’s audio that I dislike. Why should we try to please everyone? Should I employ manufactured objectivity in the same manner that reviewers with click-through goals do? Since this is my blog, I have every right to claim that anything is the best.

To be honest, I do not believe that this is the best-sounding earphone available. I never held that to be true. The Xenns Up is much better suited for a basshead. The Ety ER4SR might be more practical for a producer. I have a tier of headphones and IEMs that are all positioned next to one another. I can see a case being made for every one. The Monarch is now ranked above the Sony IER, the Unique Melody Mest MKII, and a few other models.

The Thieaudio Monarch Mk2 match them in terms of sound, and they are significantly less expensive. That is the only difference in my opinion. Despite being more expensive than the original, these earphones still look like a fantastic deal to me. They have a nice sound.

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