THIEAUDIO Oracle MKIII

The clearest agreement in the record. Even its harshest critic calls separation excellent; reviewers consistently describe busy tracks pulled apart cleanly, with instruments easy to place.

“the stereo width and the separation on the Oracle Mark III is fantastic”

Super* Review (video)

“Separation - the sense of space between notes - is excellent owing, again, to the airy highs and the slightly recessed 3-4kHz region.”

Theo Lee (Precogvision), Headphones.com

“But by combining Imaging and Soundstage, this IEM is a technical monster.”

Argha, Head-Fi

Wider than average and often called holographic, with decent height. The caveats are about degree: it's width-led like most IEMs and 'not the widest', rather than unusually deep.

“There is a nice holographic soundstage on offer, creating an immersive listening experience.”

Nihal, Headfonics

“Although the soundstage is not the widest, it offers great depth and width to create realistic imaging that you can hear and sense with ease.”

Yagiz, Headfonia

“Staging on the Oracle MKIII is width-focused like most IEMs”

Theo Lee (Precogvision), Headphones.com

Sources split, and this is the record's main disagreement. Most reviewers and owners hear the twin Sonion ESTs as smooth, extended and fatigue-free, a deliberate retreat from the MKII's glare. A smaller group, including the two measurement-led reviewers who bought or borrowed it independently of the distributor, hears peaky, artificial or tiring energy around 6 kHz and in the top octave. Even fans warn that tips, source and bright recordings can tip it over.

Sources split on how well the colourings hang together, not on what the tuning is. Nearly everyone describes neutral with a bass boost (a mild U to some), warmer and safer than the MKII. Most call it a coherent, balanced all-rounder; a minority hears an incoherent hybrid, an 'unoriginal' Hype 4 sidegrade, or a 'fatiguing neutral'.

Sources split on how much impact it has. Everyone agrees it is controlled and clean, and the larger group finds it full, textured and satisfying. A sizeable minority hears it as soft-edged, short of slam or less refined in texture and definition. One listener heard the opposite and found it boomy.

Mostly praised as clean, clear and natural, with a touch of warmth borrowed from the bass. The dissent is about weight and placement: some find vocals slightly laid back or the midrange lean and short of body next to warmer rivals.

“The clarity and transparency in the midrange are impressive, with a subtly forward presentation that doesn’t push vocals too close.”

Nihal, Headfonics

“Standalone, I would consider this a pleasant midrange - in fact, one that’s quite close to my preferences”

Theo Lee (Precogvision), Headphones.com

“it does lack that sense of body and mid-range texturing”

Super* Review (video)

“Oracle is recessed mid and vocal but technically is the best of those 3.”

Reddit owner quoted on RedditRecs (vs Top Pro and Arcanis)

Generally rated resolving for the money. A few find it steps back on micro-detail and precision, or say pricier ThieAudio sets resolve more.

“The resolution and detail retrieval of this IEM punch way above it's price point”

Argha, Head-Fi

“Steps back somewhat from a technical perspective, especially if seeking micro details or precision”

Scubadevils, Head-Fi

“Monarch mkiii has much better resolution, bass slam, and treble extension.”

u/bluebrrypii, r/inearfidelity

Sources split on how dynamic it sounds. The weightier side hears contrast as flat or 'not very dynamic and fun', with bass notes popping less than the treble. Others find it more engaging and dynamic than its tribrid rivals.

Everyone notes a big shell: medium-large to 'really large', the biggest in one owner's ThieAudio collection. Its semi-custom shape still sits securely and comfortably for most, with small ears the repeated warning. Several had trouble sealing on the stock tips because of the short, wide nozzle.

“There are no pressure points or sharp edges to cause discomfort during longer listening sessions.”

Nihal, Headfonics

“I would say that this is kind of like a medium large shape”

Super* Review (video)

“These headphones are really large, I think that's the one thing you should definitely consider before buying them”

ICYGENIUS, Head-Fi

“I found the stock silicone tips less than ideal due to the short and wide nozzle, which didn’t give me the best fit.”

Nihal, Headfonics

Well-finished resin shells with a seamless faceplate and a modular cable whose 2.5/3.5/4.4 mm plugs swap. The cable is the soft spot: some find it bulky, kinky or prone to the plug pulling apart; others rate it highly. The case is roomy but too big to pocket.

“The cable’s build quality is impressive”

Yagiz, Headfonia

“Shells feel like they won’t break even if they are dropped to the floor from a sitting height.”

Argha, Head-Fi

“sometimes it will come out if you pull on it”

Jaytiss (video), on the modular plug

Good to excellent once sealed. Foam or well-fitting aftermarket tips make the biggest difference.

“These IEMs have fantastic passive isolation, more so than the competition, with the right tips.”

Yagiz, Headfonia

“isolation of outside noises is actually really good”

the Honest Audiophile (video)

Sources split on value. At $589 one camp calls it a giant-killer that competes with pricier sets; the other finds it competitive but not a standout, with cheaper IEMs trading blows. It is now discontinued: new stock is gone, and 2026 used listings ask roughly $290–440.