
ThieAudio - Monarch MKIII
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Reddit Reviews:
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Last updated: Dec 13, 2025 Scoring
Liked most:
5
1
"spent 1000 iem in monarch mk3 is one of the best choise I ever made ... beyond that price point my ears cant tell fhe difference"
"can’t say they’re really worth the extra $1,000 over the MK3 ... they certainly aren’t “twice as good”"
"why would everyone consistently say the monarch mk3 are the kings of iems and they are 1k. ... right around 1k you start to get eargasm type quality."
6
2
"I hear details in songs I've never heard before. ... The detail in every aspect is just amazing"
"They also do some black magic with soundstage and imaging. ... The MK3 sounds bigger than some openback headphones I've owned."
"I can EQ my Tea Pro or Kiwi Ears Quintet to match the FR graph of my Monarch Mk3, but they will not reach the levels of detail retrieval, attack and decay, separation, imaging, etc of the Mk3."
17
6
"tends to sound very correct to my ears"
"to me more detailed representation of sound in general ... I personally haven’t come across headphones that can match the detail that some IEMs can provide"
"I dont feel WOW like I tried monarch mk3 the first time ... mk3 is my peak ... I cant tell the significant difference between mk3 - annihilator and tia"
5
3
"The Monarch is my bass-canon."
"it got both the rumble subbass from Variations and the midbass slams really hard."
"I find the monarchs to be a much more 'fun' sounding, that pronounced bass gives more kick than what the prestige offers which is more tight, punchy and once again, accurate. ... One being an all around amazing iem, with great technicalities, imaging and soundstage but leaning into a more fun and fuller sound."
4
1
"I find the monarchs to be a much more 'fun' sounding, that pronounced bass gives more kick than what the prestige offers which is more tight, punchy and once again, accurate. ... One being an all around amazing iem, with great technicalities, imaging and soundstage but leaning into a more fun and fuller sound."
"WOW 1,000 price tag did not give me any buyers remorse unlike the day of delivery. I finally understood the Tonality claims and how fun they were for being a Neutral Set(Certified Treble Violation) compared to harman."
"One being an all around amazing iem, with great technicalities, imaging and soundstage but leaning into a more fun and fuller sound."
Disliked most:
5
3
"I tried TheAudio Monarch and Oracle (don't remember Mk numbers) some time ago and wasn't impressed really. ... nowhere near the headphones at this price (Arya or LCD-2C) ... or substantially better than good quality $200-300 planar IEMs."
"I would use the mkiii exclusively for listening but they're too expensive for me to use them outside the house. I use the hype4 on the motorcycle or while working which are non ideal listening conditions anyway."
"it’s not like leaps and bounds unless you A/B test them"
0
4
"The build quality is far better ... Way better accessories, stock cables are awesome and the cases. ... The build quality is leagues better, accessories and stock cables are great."
"something internally definitely got loose after about a year of using them. ... I carry them around in my backpack all the time, so that might have something to do with it. ... Pretty bummed considering how much they cost."
"The Monarch Mk3's are notoriously large-shelled, and they barely fit, so I got lucky!"
1
7
"The MkIII is elevated, as you can see in the FR graph, at around the 4-6khz area. And while this does give the MkIII slightly more detail with vocals, drum attack, and guitars, it can also be the source of fatigue. And in my case, irritating my tinnitus. Because of this, I found I tended to listen to the MkIII at a much quieter level than I'd like after about 15 minutes"
"The second I use them no matter how strong or weak the seal is my bass just completely dies off and all I get is peaky treble. ... everything sounds terrible."
"I did recently buy a monarch mk3 a few days ago and thought it was just ok. I think I liked the andro better. The andros seemed to have much better clarity, especially the treble."
1
8
"my ears must either have miniscule canals because I've tried all 3 major foam sizes and I just get this insane increase in pressure when I try foams to the point it feels like someone used expanding foam sealed in my ears and they get insanely uncomfortable after 30 seconds and everything sounds terrible. ... So, no apparent seal, but then the foam feels like my ear is about to explode..."
"If monarch mk3 is 10 on a pain level lol ... I myself had to make custom eartips for my monarchs, they made some weird contact and creatd pressure points that were simply horrible."
"Comfort/Fit (essential for long listening sessions): ... 6. Thieaudio Monarch MkIII"
1
1
"I would use the mkiii exclusively for listening but they're too expensive for me to use them outside the house. I use the hype4 on the motorcycle or while working which are non ideal listening conditions anyway."
Scammy companies making dozens of models to confuse people so they buy lots? What else goes on. The simplest solution is 7HZ Zero 2. Then call it a day. Don't get scammed I am saying this from experience, I got up to monarch mk3
r/iems • There are too many options ! what is going on? ->I mean if you go by strictly measurements, Airpods Pro 2 (on rtings) and Monarchs "best of the absolute best it doesnt get better then this" 1000$ monarch mk3 (on rtings) are neck and neck, if not the Airpods Pro 2 measuring more accurately. I have zero reason to believe more expensive iems are better, and my ears dont really convince me either
r/iems • There are too many options ! what is going on? ->It's about the balance between drivers and tuning. Combine them properly, and you achieve greatness. Such as my Thieaudio Monarch MK3's, they are exceptional. 2dd, 6ba, and 2 est of pure bliss 😊
r/iems • hmmm.... ->A year ago, I switched from the Truthear x Crinacle Zero: Red to the Thieaudio Monarch MKIII and the difference was mindblowing, even though the Zero Red was really good for its price.
r/iems • What was your first experience with more expensive IEMs like? ->I have both the HD800 and the Monarch MKIIIs at my desk and I almost always use the Monarchs. I much prefer something in my ear over something clamping my head for longer sessions like gaming or work. The Monarchs are also ridiculously good and is not as source dependent as the HD800 (using Audio-gd R2R11 for the HD800 and JDS Element II for the Monarchs).
r/iems • My top Iems as of Jan 2025 ->Left to right Everyday desktop listening: 1. Linsoul x Hbb Jupiter 2. Theaudio Monarch MKIII Relaxed listening: 3. FIIO FX15 On the go: 4. Theaudio Hype4
r/iems • My top Iems as of Jan 2025 ->No i went from monarch mkiii to jupiter. However between these two the upper treble is different which I find quite interesting. Without looking at a graph it seems like the jupiter has different peaks than the traditional thieaudio sound. I haven't come to a conclusion on which I like better but it's just different. Also more sub bass than the mkiii. Very spacious sound which I don't really typically hear or care about but after hearing the jupiter, I get it.
r/iems • My top Iems as of Jan 2025 ->The only one in your list I have experience with is the supermix 4 and I agree with you. I have the Tea Pro now and it's pretty darn good for FPS gaming. The imaging is spot on to my ears. It has, what I feel, is the max sound stage an IEM can do. I even tested my friend's Monarch MK3 against them and the gaming performance was similar with the mk3 edging them out in bf2042. Both are tremendous for gaming. The mk3 is amazing at everything imo.
r/iems • Best IEMs for FPS Gaming: The results may surprise you ->I went from the EM6L > Kiwi Ears Quintet > Orchestra Lite > Tea Pro > Monarch MK3. I head a difference with every step up. I prefer the Quintet over the Tea Pro because the Tea Pro treble is darker and smoother and sounds less detailed imo. The Monarch MK3 is just absolutely amazing imo. I hear details in songs I've never heard before. The detail in every aspect is just amazing, and they're fun to listen to. They also do some black magic with soundstage and imaging. The MK3 sounds bigger than some openback headphones I've owned.
r/iems • Just how much better would the audio quality be if I upgrade from a ~$80 to $350? ->Disclaimer: I'm not a reviewer. I'm just an audio engineer and a guy that loves music. These are my impressions. If I left anything out, please feel free to ask. I've had several days to compare both of these IEMs. Originally, I'd bought just the MkIII, but after several days with it I contacted a rep at Bloom Audio and asked him for some advice. I asked if there were something he could recommend with less mid bass and a more open sound. Without hesitation, he recommended I try the Monarch MkIV. I asked about the Prestige LTD and Dunu Glacier, but he insisted again that I try the MkIV for what I'm after. I listened to various genres over the last several days, mainly metal, rock, classic rock, and EDM. I'm using an Astell & Kern HC4 plugged into the USB C port of my iPhone 16 Pro Max. I tested both cables on both IEMs, and used both the 3.5mm and 4.4mm tips. Cable and accessories- Cables: Both sets come with a nice modular cable. The MkIII comes with 2.5mm balanced, 3.5mm unbalanced, and 4.4mm balanced tips. The MkIV comes with only the 3.5mm unbalanced, and the 4.4mm balanced. The MkIV's cable seems a bit higher end, but is a little too bulky and heavy for me compared to the MkIII. I prefer the MkIII's cable here simply for the comfort. Tips: The MkIII comes with a set of standard silicone tips and a set of foam tips. The MkIV comes with a standard bore silicone, narrow bore silicone, and foam tips. I've tried swapping in Azla SednaEarFit ASMR, TRI Clarion, and Spinfit W1 tips. To my surprise I liked the stock silicones the best, and the standard bore silicone over the narrow on the MkIV. The stock silicone tips on the MkIV do seem to be of higher quality than the stock ones on the MkIII. Case: The MkIII wins hands down here with its semi hard zip up case. The felt covered cardboard puck of the MkIV is simply trash. My package was brand new in the plastic and the sides of the puck were already starting to collapse when I took it out of the box. I've already ordered a replacement case on Amazon. Sound Impressions- Bass: This is one of the main noticeable differences between the two IEMs. While the MkIV has less upper mid bass energy than the MkIII (a welcome change), both IEMs are what I would consider bass heavy in their sound. If I could reduce it just a little more on the MkIV I would prefer it. The bass on both sets is big and punchy, if a little undefined at times, and not as snappy as I'd like, but overall of nice quality. Worth noting that the bass quality is better at moderate volumes than the lower volumes I tend to listen to. I think if anything, these IEMs tend to highlight flaws in mixes and masters. Tracks with a well defined and sculpted low end tend to shine here, while sloppy and bloated low ended tracks are exaggerated. The main thing that turned me off from the MkIII is its mid bass that does quite often tend to dominate the sound of whatever I'm listening to. The MkIV is much more controlled here, though you do have the "rumble" switch that will give you a 3dB lift in the mid and sub bass area, giving you a somewhat more controlled emulation of the MkIII's bass if that's what you're after. It can definitely make the right track bigger and more engaging for certain genres. Mid Range: This is the Monarch's wheelhouse. There's a saying in the pro audio world that "the magic is in the midrange", and I strongly agree. Without great detail in this frequency range, you're really missing out on a lot of crucial information about the song. Both sets have a natural and detailed mid range here, with nothing to objectively complain about. The MkIII is elevated, as you can see in the FR graph, at around the 4-6khz area. And while this does give the MkIII slightly more detail with vocals, drum attack, and guitars, it can also be the source of fatigue. And in my case, irritating my tinnitus. Because of this, I found I tended to listen to the MkIII at a much quieter level than I'd like after about 15 minutes, while on the MkIV I can listen to moderate levels for much longer without fatigue or amplifying my tinnitus. Upper Treble and Air: I was a little surprised at how much more open the MkIV's sounded compared to the MkIII when looking at the FR graph (last pic in my post). The slight lift at 10k and the big spike around 15k seems to contribute a lot to the general sense of space and air in the MkIV. The MkIII sounds a little rolled off in the upper treble, the MkIV sounds open, airy, and gives you a better sense of space. These are just different flavors, and I can see some preferring the warmer top end of the MkIII. It's reminiscent of listening to a recording on older analog tape to me. The upper frequencies are slightly subdued, but all of the information is still there. The MkIII shines on recordings like David Bowie's Ziggy Stardust and the Spiders from Mars. It sounds accurate to the recording and to the era. The MkIV makes the same album sound like it was remastered for more air, cleaner bass, and more separation. This is where a case could be made for owning both sets of IEMs. Comfort and Fit: This is another area that surprised me. I find the MkIV to fit perfectly in my ear, and for long periods of time. I was expecting a heavier and clunkier feeling IEM because of its slightly larger size and the fact that it's made from aluminum. They must have fine tuned some of the contours because I don't have to twist or push the MkIV to sit in my ear like I do with the MkIII. It also feels lighter, even though I saw a review where they actually weighed both sets and the MkIV is the slightly heavier of the two. The large nozzle of the MkIII also started to hurt my left ear canal after about an hour, whereas I haven't had that issue with the MkIV yet. In the included pics I show the fit of the MkIV, which sits very comfortably in the ear, but does protrude just a little more than the MkIII. Summary: I guess it's obvious by now that I prefer the Mk IV for my own tastes, and will be sending the MkIII back to Bloom tomorrow. I didn't see many comparisons out there when I was originally searching for a replacement for the MkIII, so I'm hoping this review can help some people that are also considering these two great IEMs. Thanks for reading.
r/iems • Thieaudio Monarch MkIII and MkIV impressions and comparisons. ->Amongst the thieaudio iems I’ve tried Valhalla > prestige Ltd > v16 divinity > monarch mk3 > monarch mk2
r/iems • Has anyone else bought the Thieaudio Valhallas? I'd like to know from a more experienced audiophile how they stand up against the competition. ->Mest MK2 ests are hardly noticeable, there’s something about legacy iems with first gens of est that they’re not even on par with BAs . (If not mistaken current gen is 3 or 4) I would say my experience with: prestige LTD( amazing, there’s so much air and anything from mid to upper range is just magic) Monarch mk3 was not as good as Prestige Volare (I have, is good, very nice punchy bass too, but remember it’s like 649$ in retail) Worth mentioning: Fiio FX17! 8 ESTs and price is 1499$ (it’s a lot, yeah) but all the reviews and comments are extremely good.
r/iems • Best EST IEM’s under 1000 that can serve as an all rounder? ->Ok so this if from my personal experience.... I have several iem range from sub 100 until 500 some I lent to my friends or I just keep on my house...I have several friends which audio hobbyist they have audio store so I have opportunity to try before I buy one..so someday I want buy 1000usd iem, read reddit and head-fi forum then go to my friend store...so I tried moondrop chu2 compare to my kadenz yes the quality is very different, compare again with letshuoer s15 the s15 better than my kadenz for my taste...so when I put monarch mk3 it's blow my ear, damn this iem so amazong and I decide to bought it....then several weeks later my friend call me then say I have 64audio tia demo and annihilator just come....with fully excited I'm going there when I tried both of them, I dont feel WOW like I tried monarch mk3 the first time then at that time I realize, mk3 is my peak and I cant tell the significant difference between mk3 - annihilator and tia So thats why I like to try and buy several 100-500usd iem and sometimes sub100 too because I can tell the difference and I can choose whats signature I want..like a week ago I choose simgot ea500lm rather than ew300 because I found the sound more aggresive because mostly my iem is warm and neutral.... So from my story, I have limitation and taste for me, spent 1000 iem in monarch mk3 is one of the best choise I ever made and beyond that price point my ears cant tell fhe difference so..but back again thats my experience and opinion....
r/iems • Is it Worth buying 2000 dollars set of iem? ->Monarch mk3 is larger than common iem so sometimes it's exhausting for long time usage, everytime I bought new iem I always change tips mostly using spinfit W1 to make me comfortable...about build quality I dont think thats the problem....again about build, sound quality it's back to personal preference...
r/iems • Is it Worth buying 2000 dollars set of iem? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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