Fosi Audio IM4

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Overall

#75 in

IEMs

according to Reddit Icon Reddit

Sentiment score100% positive
16
0
0
Last updated: Apr 30, 2026

Reddit Reviews

Reddit Icon48-Cobras
5 months ago

Fosi IM4 should be everyone's sub-$100 pick.

4 months ago

The Septet is really disappointing, not because it's bad, but because my $85 Fosi IM4 does the same thing for much cheaper.

Reddit IconAgreeable_Purpose188
5 months ago

I'm listening to my first song on these as I type this (Ring of Past by Men I trust) and I'm pretty impressed! I like the detail up top and, like you said, the punch of the bass isn't as soft as I expected. I probably will mess around with long light EQ on my Protocol Max just to see how it goes, but overall I'm pretty happy for the price. Then again, I'm one song in haha

Reddit Iconbassmaniac69
3 months ago

I just picked up a set of the IM4s and am quite surprised at their sound for the $ I paid. I’m running it though my ZH3 as well, and for my old ears is fantastic. How do you find the KA11? I’m looking for something on the go as well.

Reddit Iconcyprusbarin
5 months ago

I've got both headphones and IEMs: Headphones: Beyerdynamic DT 770s - these are amazingly comfortable but they came out in 1985 IEMs: Fosi Audio IM4s came out less than a month ago and they're insane in terms of audio quality BUT they don't hold a candle in comfort vs the DT 770s Get yourself an audio interface like the Focusrite Scarlett and nice mic like the Audio-Technica AT2020

Reddit IconDracomies
3 months ago

Fosi Audio IM4 (in black), Celest Wyvern Abyss (original, not the remaster), Celest Phoenixcall (clear not the red) , Elysian Pilgrim, Binary Acoustics EP321 in the mosaic color (zero interest in buying it though), Moondrop Blessing 3, Moondrop Blessing 2, Campfire Andromeda 2020, Binary Chopin, HiBy Yacht 10, Celest Pandamon V 2.0 (absolutely gorgeous shells), Tanchjim Soda, Simgot EW300, Softears RSV Mark I, Softears RSV Mark II, Tanchjim Fola, Juzear Defiant in emerald green, Kiwi Ears Orchestra Lite in green, Letshuoer Cadenza 4, Simgot EM6L, Crinacle Dusk, Truthear Nova (beautiful shell), Mangird Tea Pro, Truthear Zero Blue 2 (gorgeous shell), Tangzu Xuan NV mainly because of the box art, Tipsy M3 (mid sound, but the shells are drop-dead gorgeous), Moondrop Meteor, Letshuoer S12 Ultra, Moondrop Chu 2, ROSESELSA Aurora Ultra in blue, Softears Volume S, Dunu Kima 2, GK Kunten (hate the shilling but the design is nice), Moondrop Variations in black, Simgot Supermix 4, HiBy Ace, Final Audio A4000, Letshuoer S08, Binary Dynaquattro, Tanchjim Force, Tanchjim Origin, 7Hz G1 in white (too bad the sound isn’t great), Moondrop Kadenz, Divinus Fuduverse Version 1 (not v2), and Tangzu Xue Tao, which I’m pretty sure is what originally sold me on it visually. Edit: Twistura Woodnote, Cadenza 2, Juzear Harrier (in the blue), Ddhifi Surface too

2 months ago

**Pretty but sound is decent** under $110 ======================================= Fosi Audio IM4. Black. I think silver looks good too but can't confirm; I have the black one. I was actually pretty surprised by the sound. Pretty good. Very pretty and elegant shell. Nicely designed. Sound is actually purty good. Defiant. In emerald green. Gorgeous shell!!!!! Solid iem. But note it does have Quality control issues. Dunu Kima 2. Get the Raven version for better artwork. Looks nice! One of the best iems at the $100 pricepoint. Celest Wyvern Abyss original. Not remaster. Gorgeous gorgeous gorgeous shells! More of a vocal set. Has no technicals, ie no soundstage or imaging. But great for vocals. I got it for 9 bucks. Celest Pandamon 2.0. Purty shells. Beautiful shells. Chill sound. Pair it with Kiwi Ears flex eartips. I love the way it sounds. Very comfortable. Xuan NV. Not gorgeous per se. But the box art is stunning. But the iems aren't ugly by any means. Great sound. Great vocals. Great bass. I dig it. Also comes with Tang Sancai eartips. Save those for another iem in the future. Those eartips brighten stuffy iems. **Pretty shells but I'm not sure** under $110 =================== Letshouer S08. GORGEOUS shell. I can't find myself to enjoy it. It's a weird sound. I think Artii T10 (WAY WAY uglier) sounds better. **Pretty shells but sound is eh** under $110 ========= Zero Blue 2 and Zero Blue 1. Very pretty shells. Don't recommend for sound. Gets very harsh and sibilant. Cadenza v1. In purple. I bought it. Pretty. The sound is eh though. It's thin with male vocals. Pretty though. That purple color is gorgeous. Chu 2. It's a pretty shell. Sound is eh. Thin-ish with vocals. Not full. Cadenza v2 in Blue. Pretty shell. Recently checked it out. Still have it. Has a typical sound. 7hz G1. Pretty shell. I think it looks sick in white. Bought it. Too bright. Simgot EW300. Shells look nice. I didn't care for the sound. Celest Phoenix Call. Currently $69. Gorgeous! Absolutely gorgeous!!!!!!! But the sound is oh, so close but not there. :S I still kept it because I love its design. I like the clear one! https://preview.redd.it/lnubp4i6qkkg1.jpeg?width=600&format=pjpg&auto=webp&s=007704c2d634b3df2c5c4b51b196efc50aa20cfa

Reddit Iconhungry057unit
5 months ago

personally i love the Fosi Audio IM4

5 months ago

I absolutely love the new Fosi Audio IM4, i've got plenty of models of IEMs, including $1000AUD+ ones, but the Fosi Audio IM4 is pretty much the only IEM that's actually surprised me by how good they are.

5 months ago

I've got a bit of a Fosi collection, i've also got the Fosi BT20A Pro amp going into some expensive speakers, Fosi Luna turntable with Fosi Box X5 preamp, and Fosi i5 headphones. Honestly i got the IM4 IEMs just because i like backing Fosi on kickstarter and because the IEMs were affordable, i wasnt expecting much, especially since it is their debut entry into the IEM world. Keep in mind that just before my IM4's arrived, i got FiiO FD5's and Letshuoer EJ07M in, which are both much more expensive and up-market. i listened to the FD5's and though that they were waay too warm for me, so i changed out the nozzle and installed the triple flange ear tips which definitely helped, then i tried the EJ07M, which aside from the GOD AWFUL cable they come with (which i would have cut up and thrown out if it weren't so expensive) they are definitely great sounding.. but you'd expect that for how much they cost and the reputation they have. Then the IM4 arrived... and I put them in and I couldn't tell you exactly what it was but they just sang to me. I listened to songs I love such as The Light From One by Ane Brun and they just blew me away even though they're affordable. TL;DR Fosi IM4 is gud! <3

5 months ago

The cables come with them, and it's honestly a pretty good cable. The IM4 is definitely one of my absolute favourite models of IEMs.

4 months ago

The features and driver compliment don't tell you anything about how it will sound, or the quality of it. if the company wants to make a great sounding pair of IEMs they will, there are great sounding IEMs with just dynamic drivers, and crap ones with multi driver topology. I absolutely love my Fosi Audio IM4, I love my Hidizs Mk14 Turris, I love my Fiio FD5 and my Letshuoer EJ07M.

Reddit IconImplementAromatic
2 months ago

I have im4 and wan er bass edition i prefer im4 wider soundstage

Reddit Iconits_mardybum_430
4 months ago

For Fosi’s first in ears they are really good. I got the silver pair and they’re really well made. I like them more for music and podcasts. Was fun for me to experience an “open back” in ear. For gaming I would look at something more like Simgot EW300 or save and get Kiwi Ears Astral which is my favorite set at the moment (by far, like way more than anything else in my 7-8 pairs)

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