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Deuce
180 in IEMs

FATfreq - Deuce

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Reddit Reviews:


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33
11
11

Based on 1 year's data from Feb 25, 2026 How it works

Liked most:

23

12


"has a dedicated "woofer driver" that handles things below 150hz"


"It's primarily a sub-bass iem. ... Deuce is a twin dynamic driver IEM with a woofer driver that primarily works under 300hz. ... On both the Deuce and the N3, I can *feel* this. It's not just a sound that's made in my ears, but like over-ear headphones I can genuinely feel a little bit of it. ... Deuce has like 5db more of it without the adapter"


"Deuce is sub bass heavy ... When the sub bass kicks in on the track, it kicks in. Really satisfying rumble."

7

7


"Deuce sub bass is there, but it doesn’t drown everything else out. Vocals and highs are very much present, same with mids."


"The Deuce is a solid pick for you since you like the deep rumbling sub bass that doesn't necessarily eat the mids.... ... You will hear the sub-bass rumble without losing mids or highs."


"The Deuce has great balance between bass and treble, doesn't feel like the bass muddies the vocals."

4

3


"You'll have no problem with the deuce nozzles. They're; short so they don't need a deep fit. ... You won't notice they're huge."


"Both extremely comfortable"


"the nozzles really are on the larger size, but not a problem for me.. they fit perfectly."

3

0


"in that price range ($220) it eats up almost any IEM even some of the $400 ones."


"It's actually good value considering its driver configuration, despite being a bit pricey."


"for how much they cost they are some pretty nice sets!"

4

2


"I really love the Deuce, but that’s just for listening to music"


"very immersive for single player"


"while amazing rumble on them, i use them to listen to EDM"

Disliked most:

5

6


"While the deuce has nice bass slam, the rest of the sound lacks resolution. Almost to the point of sounding muffled."


"my deuce is not that vocal forward and detailed with songs that are just vocals and a guitar"


"my eardrums couldn’t take the abuse"

5

12


"Didn't have enough bass for me"


"While the deuce has nice bass slam, the rest of the sound lacks resolution. Almost to the point of sounding muffled."


"If you like midbass, avoid the Fatfreq Deuce - It's primarily a sub-bass iem. ... Deuce tapers off *completely* by 200hz normally, even with the 15ohm adapter."

1

3


"Too bad they dont fit me ... Yeah its a weird fit. Its somehow too big and too small at the same time. ... But it still sucks"


"Also, the shell is huge on Deuce. ... It's even bigger than the Zero Red in my experience."


"they just don't fit my ear that well"

0

1


"their QC issues are one of the worst"

0

2


"deuce awful for competitive gaming"


"I really love the Deuce, but that’s just for listening to music, not gaming. ... Your instinct might be right where the huge bass impact might be over shadowing the micro details a bit."

Reddit IconBlassmer 1.0
r/iemsShould I go through with purchasing the FatFreq Deuces?
10 months ago

Imho hell no. The deuces are the definition of "only bass" nothing else. To put it into perspective, it's like a car that was built for top speed. It can't turn it can't accelerate but ut sure can hit a high top speed. It's an absolute one trick pony that did not take into consideration tor any other parts that a person might enjoy for music. That and their QC issues are one of the worst hence why I also do not recommend them

Reddit IconBrentonB89 1.0
r/iemsMy bass-head IEM for rock/metal journey.
3 months ago

Listed from cheapest to most expensive: CVJ Luki KB Ears Rosefinch 7hz Legato 7hz Diablo Fatfreq Deuce TSMR Armor TLDR winner: TSMR Armour So I've been on the hunt for an IEM that works well for metal with thunderous bass that clearly defines kick drum from bass guitar. I'm treble sensitive and what would probably be considered an extreme bass-head in this community, so my opinions will probably only be valid for a small selection of you but hopefully this helps someone. Impressions (favourite to least favourite) without any EQ: Armor: does everything right for my ears. The only IEM that I haven't felt the need to touch EQ. Kick and bass guitar are balanced wonderfully and a really pleasant warm sound signature without fatiguing highs yet still sounds clear and transparent. Is an absolute monster if you plug in to the deuces impedance adaptor. Diablo: Similar thoughts to the Armor. Less sub bass than the armour but has fantastic midbass punch thanks to the planar. Also a pleasant warm signature though the slightly boosted uppermid/high presentation makes me slightly prefer the Armor. Close contest though! Deuce: lots of sub bass but in stock form without EQ the lack of midbass makes it sound thinner and more brittle than the other two above when listening to rock and metal. Highs are a bit harsh for my ears without the midbass to smooth it out. This pair sounds fantastic for genres I don't really listen to much though - think any music that's sub bass heavy - R&B, hip-hop etc. With EQ the deuce can be made to work well for rock and has the largest quantity of sub bass of the others, so its still a set I enjoy using depending on my mood. This pair made me decide to not try Martilos as they seem to have a similar tuning looking at graphs and reviews. Legato: plenty of sub and mid bass but lacking some definition between kick and bass guitar. Upper frequencies are a mixed bag: a little muffled/veiled yet also has some sibilance. Probably the one set I wouldn't recommend as it sits in an odd price bracket where it's just outside of 'cheap' where you get the value for money recommendation yet just a little below the midrange bracket which are a significant step up. Rosefinch: similar to legato - less veiled but has a very irritating fatiguing spike at around 8k that kills this pair for me. With EQ these turn in to quite a good value for money bass-head pair though. These are my knock around pair for travel, workout etc. This pair with a cheap peq dongle like the JA11 would be my budget conscious recommendation. Luki: just a super cheap $10 set to test out bone conduction. Not enough sub bass and wonky tuning. EQing helps a little but still sounds cheap. However I love the way it made bass guitar sound in some tracks - assuming that's the BCD. Makes me want to try something like the Penon Archangel but for now I'm satisfied with the Armor and not sure I want to push this hobby in to the high price bracket when I have nowhere in my hometown to 'try before you buy' (Brisbane).

Reddit IconBuck-O 1.0
r/iemsI think I’m done for 2025
12 months ago

The fact you even got a set of Duces is a lottery win in and of itself. Stop while youre ahead.

Reddit Iconcapital_YR 1.0
r/headphonesMy most used IEMs
5 months ago

Hi guys, a few months ago I saw an interesting format in the watches sub and I decided to take inspiration from it. I recorded the hours of my IEMs used in the last 2 months, in total I stopped at just over 400 hours, it was an interesting experiment especially to understand what I can sell and what is not used. I'll leave you some impressions and comments:) * Punch audio Martilo: In the end they were my most used between Work, Music, Gym and Gaming. I must say that lately I listen to a lot of phonk * Tangzu Tianpeng: They replaced my Bajie, excellent quality and accessories for more refined listening at home or excellent for gaming * Tanchjim Force: They are becoming my favorites, already heard at various fairs and lent by a friend, excellent aesthetic and design, sound similar to my beloved Meteor, but they are less goofy and therefore I can also wear them on trains or at work, I will definitely increase the hours * Moondrop Kadenz: Great all-rounders, simply top, but I'm using the Forces more for a similar sound. They're perfect for work. * Moondrop Meteor: Among my favorite flagships, but I'm more comfortable with the Tanchjim as they are more discreet, I listen to the Meteor at home in peace * Fatfreq Deuce: They were the most used for the same reasons as the Martilo, but I prefer the Punch Audio for design and comfort. The bass is perfect in both.

Reddit IconConstant-Conflict297 1.0
r/iemsBest BASS/Hip-Hop IEMs?
11 months ago

I’ve been in the same boat and have managed to shot list it to the FiiO fh7 or the fatfreq hbb deuce.

r/iemsBest BASS/Hip-Hop IEMs?
11 months ago

The deuce it is! Grazie!

Reddit IconDeathpoop5 1.0
r/iemsBassy IEM - What do I pick?
7 months ago

I got the Kiwi Ears Punch last year and I have been loving them since! Great bass, both mid and sub bass, also great separation! I listen to mostly metal so they get the job done!  I had the ISN Neo 5s, I liked them alot especially vocals but they really only shined for music like rap/hip hop which i dont really listen to. Couldn't handle faster music like metal.  Also had the Deuces but the lack of midbass was a big flaw for me! They kicked ass for drum and bass and tech house though which are genres I also dabble in every now and then

Reddit IconDependentKey6405 1.0
r/iemsI have finally found my endgame.. Symphonium Audio Titan's
6 months ago

Ive also had the Deuce! Forgot them. These are next level unfortunately from the deuce’s.. a fiio k11 r2r as dac and schiit midgard amp

Reddit IconDependent-State-1153 1.0
r/iems$200-$300 iems? Too many options
10 months ago

Try the Kiwi Ears x HBB Punch if you really like bass. Personally I like the Punch more then the Deuce tbf for bass, feels like it's more organized. But if you can, demo them at a local audio store or go to a local audio hangout event and try them out.

r/iems$200-$300 iems? Too many options
10 months ago

then deuce if you're a basshead. Odyssey is very lax and you can listen to it for hours without fatigue, you'd appreciate it more after hours of long listening sessions, I only listened to it for like 30 minutes and can tell it's very nice. But since you wanna avoid Ziigat, just grab the Deuce or P7, no opinion on the grit because haven't tried them.

Reddit IconDishProfessional7905 1.0
r/iemsShould I buy the Fatfreq Deuces?
11 months ago

I have the Deuce and its a great set but it's a resin shell. A part near the 2-pin connector cracked and I had to go down to their HQ to fix it.  So if you get a pair, you either have to know how to fix resin using glue. Or live near an IEM repair shop. I had my cable glued into the IEM so that it'll never come loose.  Cable is microphonic but in return you get great isolation.  I don't think 4.4mm has any audible benefits. Not just on this pair but in multiple headphones and iems. Just stick to 3.5mm so you have compatibility with all your gadgets.  FiiO K3 is fine to power these.

r/iemsShould I buy the Fatfreq Deuces?
11 months ago

The body of the IEM. It cracked because the cable and 2-pin female connector was very tight. It's a fairly common problem for the Deuce. You can find it here on reddit.  I don't regret and enjoy my deuce a lot. But if durability is the main concern the Myer Audio SLIIVO SL-41 Mk2 is also bassy.

Reddit IconDJGammaRabbit 1.0
r/headphonesI wanna rattle my brain with bass. Help please?
12 months ago

I have a 2 18 wall. Ive looked for everything outside of beats for years and have come up short.  Iems dont come close but you may want to look at the fatfreq x hbb deuce, kiwi x hbb punch, and theres a guy named phil who makes a "philphone", an open back with bass ($700ish). There's also fatfreq scarlett and maestro mini.  Otherwise the budget option is a truthear zero red with EQ. I just match my zero red to a deuce for my portable bass fix. The headphone with the most bass is discontinued, a jvc sz-2000. With heavy eq it can vibrate a sheet of paper.  Actually look at skullcandy crusher evos. Consumerism sound, probably bloated bass but lots of it. 

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