Sony

IER-M9

Sony IER-M9

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Overall

#246 in

IEMs

according to Reddit Icon Reddit

Sentiment score61% positive
14
5
4

Top Pros

Top Cons

Last updated: Jun 30, 2026

Reddit Reviews

Reddit IconAdAdditional8414
5 months ago

full sized. I pick my hd660s and even my hd620s over my ier m9 anytime

6 months ago

I prefer my fiio fd15 compared to my Sony IER M9. The vocals on the fd15 is top notch

5 months ago

I have a tanchjim bunny, fd15 and ier m9, all three are from different categories and different price points. Yes, ier m9 are superior in every aspect you can think of except the soundstage. Although I love the m9, I honestly think both my hd660s and hd620s are superior in terms of listening experience, enjoyability and comfort.

Reddit IconAg116797
8 months ago

What's your budget if you have the funds my recommendation is the Sony IER -M9.

Reddit IconAo_Kazusa
10 months ago

It should be fine as long as you don't try to deep insert them if you are using silicone tips. Divinus velvets, acoustune aex70, xelastecs, and both baroque tips work for me, but that mostly depends on your ears. The eartips should seal enough to not create a vaccum seal. The downside with silicone tips and the m9 is that noise isolation is much worse compared to foam tips.

10 months ago

I would recommend demoing the m9 if you can. I find that the sound changes quite a bit depending on the eartips. Also, the textured coating could be uncomfortable.

Reddit Iconbthf
9 months ago

IE600s are notoriously v-shaped IEMs that are pretty far out from neutral with exaggerated bass and treble. In terms of form factor there isn't really a like-for-like replacement for something as small as the IEs. Some additional recommendations worth checking out: Aful Dawn-X, laid-back and natural sound, almost inoffensive. Symphonium Crimson, aggressively fun like the IE600. 4 BAs make it one of the simplest constructions in that price range. Symphonium Europa, a more balanced brother to the Crimson. Letshuoer Mystic 8, very dry tonality but that's also what makes it special. A statement piece of an IEM. Actually close to neutral, as in, most people will find there's too little bass. Yu9 Que, if you could get your hands on one. The hype mainly comes from its price-performance ability and it could absolutely go toe-to-toe with many $1k sets, though I find its tuning stereotypical. It's a solid all-rounder choice if I don't know what your tuning prefs are. 64audio Tia Trio, if you're considering the U12t already you could also consider this. Some of the best bass I've heard in an IEM bar none. U12t sounds boring by comparison. Sony IER-M9, another laid-back oldie and a perennial competitor to the IE600. Depending on where you are, they could be had for cheap. Warm neutral presentation with treble boost, dynamics are its Achilles heel. Thieaudio Valhalla, much more refined v-shape presentation than the Monarch MkIV and more comfortable. Given your budget goes up to $2k, this is very much worth checking out. In terms of fit, Thieaudios are notorious for big shells and contentious comfort, so the advice is always to try before you buy if you could. You'd have the best luck with 64audio, maybe Symphonium, but Symphoniums will take some time getting used to because they aren't vented.

9 months ago

Supernova's nozzles have a small lip and I've had no problem fitting tips, though its nozzle size means you'd need some persuading for smaller tip nozzles. Might be a camera angle issue because it's not that noticeable with black resin. It's also available in plain black if that's your jam. I prefer using [B&K 5128 graphs](https://graph.hangout.audio/iem/5128/?share=JM-1_Target,Supernova,IE600&bass=0&tilt=-0.7&treble=0&ear=0) for comparing because it's a better measuring rig but I also understand Crin doesn't have measurements of the U12t or the tia trio on the 5128. U12t has physical modules that let you adjust the amount of bass so that might be worth checking out before you even consider EQ, [Precog's graphs](https://precog.squig.link/?share=IEF_Comp_Target,64_Audio_U12t_S3_\(M20\),64_Audio_Tia_Trio,64_Audio_U12t_S3_\(M15\),64_Audio_U12t_S3_\(MX\)) give a good idea of the differences. You can't determine bass 'quality' on driver type alone. While the tia trio does have 'better' bass than the U12t IMO, by no means does this mean the U12t has 'bad' bass. It's still rich and powerful and outperforms many DDs out there, and the same goes for its little brother the U6t. Also depending on where you are, for all of the IEMs discussed, go used if you're willing to. You might get a better deal because they are relatively old.

Reddit IconDa-real-obama
3 months ago

Ier m9 they really are that perfect I have no comments or downsides. Truly my favorite pair Soft ears studio 4 , top level separation and vocals at such a reasonable price point

Reddit IconDracomies
24 days ago

I don't like the word 'trust' here. But I'll say that there are iem reviewers I'm more in sync with. I sort of look at reviews sort of like everyone with a map in a forest. If every damn person says there's a tree next to a lake, there's a 100% likelihood that exists. But if every reviewer says the birds are in one direction and another, there's definitely some variance. So here goes: **JayAudio.** He loves the Zigaat Odyssey v1, Chopin, Truthear Nova, Supermix 4. He loves Hexa and hates Pure. He likes Arcanis. He loves a TON of Simgot iems. I think his preferences are--> V-shaped and bright. Or Harman. >!I don't like the Odyssey, Chopin, Supermix 4 or any Harman Iems. I also like Pure more than Hexa. I hate nearly all Simgot iems. Nearly all Simgot iems are super bright, shouty, sibilant and thin with vocals. But hey, that's just me. I also think the Arcanis is ironically bad with vocals, male vocals in particular. That said I hate Harman 2019 iems, imo they make vocals too thin. Also. He called the Supermix 4 "buttery smooth". I assure you it is NOT "buttery smooth"!!!!!!!!< **Mark (Super Reviews)** \- He likes Hexa. He likes Blessing 3. Ranked it 5 stars. He calls Moondrop LAN an S-tier iem. I think his preferences are--> Neutral bright. Lean bass. >!The Blessing 3 isn't a 5 star iem. It's a 2 star iem for me. ;P I like watching his reviews because if he warns about problems with an iem, he's spot on.!< **Precog.** He leans bright. And expensive. 😃 He values treble a lot. But I can't give a definitive answer because 99% of the iems he's reviewed are above the price of a car. I find that at least with the cheaper iems he managed to review, I agree with him. He has to review more peasant iems. And he needs a shirt. **Jaytiss.** He ranks Hola, Sivga Que, Etymotic ER2xr as F. That's all I need to know. >!To me those iems are not F. I freaking adore the Hola and Sivga Que. So when someone says to me, but Jaytiss reviewed this A, I go..so?! But imo this is important to know.!< **Zeo Reviews.** He likes everything.>! But you should tread caution with actually buying everything he recommends.!< **Andy Vault**. He likes everything. >!But imo that's dangerous to a wallet.!< >!If he was a real estate agent, this is what he'd do.!< >! If the house was small he'd say 'it's quaint'. If it's a crime scene, he'd say, "It's lively and has character." !< >!If it's tattered and dirty, 'it's rustic'. !< >!I legitimately watched his "walkthrough" of Zigaat iems (I already tested all those iems but wanted to hear what he said) and walked away thinking, holy hell, that video told me nothing rofl. !< **Paul Wasabi.** I find I'm in sync with a lot of his reviews. He never outright says he hates an iem. But you can tell with more subtle things he's doing in his video. If he didn't like the iem he does a ton of eq on it and shows you how he's eqing it. You can tell what he's adding or taking away to know what's wrong with the iem. **Audio Amigo.** He does an excellent job of describing everything about the iem and I walk away with a good understanding what it'll sound like.>! I'm a bit skeptical now that he's joined the land of the Overseers. (shaking head) We lost a good reviewer 😛 I liked him a lot more when he wasn't owned by Linsoul 😄 !!I also can tell a lot of people who are selling 64 audio iems on Avexchange lost thousands of dollars without them saying they lost thousands of dollars lol!< **Bangaudio Reviews.** He's another Zeos. He likes everything. >!He's veering towards unreliable.!< **Akros.** He's too wordy and rambly. Hot take, but I actually use Gemini to summarize his takes because he's all over the place.

24 days ago

PART II **Prime Audio Reviews** I like him. He's concise. And he's actually quite honest. I'm pretty calibrated with him. I listen very closely to how he uses the word "lean." If he says "lean" like 7 times on an IEM, I back the fuck off. Because he nailed it 1000% every.single.time. Ie., lean bass, lean mids, lean here. Every single time he calls an iem "lean", he nailed it. I buy it. I hear it. And I think, "Damn. He was right." There's a certain way he says it. Almost like if you wanted to know about someone and you ask, "Is she cute? or "Is he cute?" and he says, "Well.....(cough)....she's uh....(coughs)...I mean....She's tall." It's the saying without the saying. And it's VALUABLE! He's also extremely descriptive and to-the-dot in his reviews. He's, imo, one of the most indispensable reviewers for me. Very few times do I disagree with him on an IEM. He never says it's bad. He says it in a way...where you have to know his lingo. "Um, well the bass...lacks....authority. Lean. Quite lean......" --> translation: It's bad. **Passion for Sound** He's good at telling you about things that are new. He's not the best at telling you what he hates or dislikes. I look at him more like a paper catalog. **HBB Reviews** My overall take is that if I were a hip-hop and rap guy, I'd love his channel. Every time I click on one of his videos, I see his gloves and hear some hip-hop song. Problem is, I don't listen to hip-hop. And I don't picture HBB as the kind of guy who listens to Matt Prasty K-pop remixes lol. That said, I love Xuan NV IEM and he tuned that iem. **Fresh Reviews** I don't know enough to form an opinion. But he's gaming-focused. So anyone who wants to know about gaming IEMs, I just say go to his channel. **Practiphile** I actually like his reviews a lot. Cool cat! He's entertaining to watch, but he's also pretty clear about what he likes and is good at describing an IEM. I do find his grading confusing at times, ROFL. He ranks the Cadenza 2 the same grade as the Yu9 Que. And I'm literally bashing my head on the monitor! But preferences are preferences. He liked the Celest Pandamon. I liked that. He liked the Kima 2 and the Pure. I liked those. He likes the Defiant. I liked that too. He loved the Misty Blue. I adore that IEM. He liked the Divine. I liked that too. He loved the Studio 4, Pilgrim, Astral, Reference, and Volume S (though I returned it because it sounds too much like Pure). I loved those too. But he also has some outliers. Ie., he loved the Chopin and EA1000, and I didn't like those. So with him, I view it as maybe 70/30. About 70% of the IEMs he likes, I like. About 30% of the IEMs he likes, I don't.

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