TAS Commitment
Product Snapshot
✨ All-in-One HiFi Solution
DAC + Headphone Amp + Preamp
🎧 High Power Output
4.4mm Balanced: 2570mW×2 @32Ω
6.35mm Single-Ended: 640mW×2 @32Ω
🎼 Premium Audio Chipset
AKM4493SEQ DAC + XMOS XU316 + 4×OPA1612
🎵 Ultra-High Resolution
PCM 32bit/768kHz | DSD512
🔌 Multiple Inputs & Outputs
USB / Coaxial / Optical / RCA
Outputs: 4.4mm / 6.35mm / RCA / XLR
🎚 3-Level Gain Control
For IEMs & Headphones (16Ω – 300Ω)
🎛 Customizable Sound
Bass & Treble EQ + 6 Filters + Op-Amp Swappable
🖥 OLED Display Interface
Clean and intuitive Z-Series design
🎮 Gaming Friendly
UAC1.0 / 2.0 Console Compatible
🔇 Ultra-Low Noise Performance
Noise Floor: as low as 1.9μV
💡 Smart Functions
Auto power-off after 30 mins
Description
Fosi Audio ZH3 All-In-One Desktop DAC, Headphone Amplifier & Preamp
The Ultimate Desktop HiFi Solution
The Fosi Audio ZH3 redefines what an all-in-one desktop DAC and amplifier can do. Combining a premium AKM4493SEQ DAC, XMOS XU316 processor, and four OPA1612 op-amps, this compact powerhouse delivers exceptional clarity, ultra-low noise, and studio-grade precision — all in a refined, minimalist chassis.
Perfect for audiophiles, gamers, and music professionals, the ZH3 functions as a DAC, headphone amplifier, and preamp, supporting both headphones and active speakers for a truly versatile HiFi setup.
Exceptional Sound Performance
Built around audiophile-grade components, the ZH3 supports PCM up to 768kHz/32bit and native DSD512 playback.
Fosi Audio’s proprietary dual-power balanced amp circuit and multiple ultra-low-noise LDO regulators ensure a background noise floor as low as 1.9μV, maintaining clean, transparent sound with every note.
High Power Meets High Control
Whether you use sensitive IEMs or demanding over-ear headphones, the ZH3 has you covered.
It features both 4.4mm balanced (2570mW@32Ω x2) and 6.35mm single-ended (640mW@32Ω x2) outputs with a 3-level gain switch, supporting headphones from 16Ω to 300Ω.
The result: effortless power, precision, and dynamic headroom for every listening scenario.
Comprehensive Connectivity
The ZH3 adapts easily to any desktop setup. With coaxial, optical, USB, and RCA inputs, plus 4.4mm, 6.35mm, RCA, and XLR outputs, it seamlessly integrates into your audio chain.
It supports UAC 1.0/2.0 mode switching, making it compatible with PCs, Macs, and gaming consoles — ideal for both HiFi listening and immersive gaming.
Tuned to Your Taste
Customize your sound effortlessly with bass and treble EQ adjustments, six digital filters, and two swappable op-amps for sonic tailoring.
All functions are accessible through an intuitive display interface, ensuring a clean, premium aesthetic that perfectly complements other components from the Fosi Z-Series.
Minimalist Design with Smart Functionality
The ZH3 continues Fosi Audio’s elegant Z-Series design language, pairing beautifully with the ZD3 and ZA3.
Energy-saving features like auto power-off after 30 minutes of inactivity offer both convenience and eco-efficiency.
What’s in the Box
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Fosi Audio ZH3 x1
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6.35mm Adapter x1
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12V Trigger Cable x1
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IR Remote x1
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USB-A/C to USB-C Cable x1
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DC 12V Power Adapter x1
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User Manual x1
Specifications
Chipset: XMOS XU316 + AKM4493SEQ + 4×OPA1612
Input: Coaxial, Optical, USB, RCA
Output: 4.4mm Balanced, 6.35mm SE, RCA, XLR
Headphone Impedance: 16Ω–300Ω
Max Sampling Rate:
-
USB: PCM 32bit/768kHz, DSD512
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Optical: PCM 24bit/192kHz
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Coaxial: PCM 24bit/192kHz
Power Input: DC 12V
4.4mm Balanced Output:
-
Max Power: 2570mW×2 (32Ω, THD+N < 1%)
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SNR: ≥119dB | Dynamic Range: ≥119dB | THD: ≤0.00018% | Noise Floor: ≤4.9μV
6.35mm Single-Ended Output:
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Max Power: 640mW×2 (32Ω, THD+N < 1%)
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SNR: ≥121dB | Dynamic Range: ≥121dB | THD: ≤0.00024% | Noise Floor: ≤1.9μV
Why Choose the Fosi Audio ZH3
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Premium AKM DAC & XMOS decoding for audiophile-grade sound
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Balanced & single-ended outputs for all headphone types
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Customizable EQ and filter options for personalized tuning
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Multi-input support for HiFi, PC, and gaming
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Compact, refined design with smart power management
🔹 Core Chipset:
XMOS XU316 + AKM4493SEQ + 4×OPA1612
🔹 Functions:
DAC / Headphone Amplifier / Preamp
🔹 Supported Formats:
PCM 32bit/768kHz, DSD512
🔹 Inputs:
USB, Optical, Coaxial, RCA
🔹 Outputs:
4.4mm Balanced, 6.35mm SE, RCA, XLR
🔹 Headphone Impedance:
16Ω – 300Ω
🔹 Power Input:
DC 12V
🎧 4.4mm Balanced Output
• Max Power: 2570mW×2 (32Ω, THD+N <1%)
• SNR: ≥119dB | Dynamic Range: ≥119dB
• THD: ≤0.00018% | Noise Floor: ≤4.9μV
🎧 6.35mm Single-Ended Output
• Max Power: 640mW×2 (32Ω, THD+N <1%)
• SNR: ≥121dB | Dynamic Range: ≥121dB
• THD: ≤0.00024% | Noise Floor: ≤1.9μV
⚙️ Features:
• Fully balanced dual-power circuit
• 3-level gain switch
• Bass/Treble EQ controls
• 6 digital filters + Bypass
• Swappable op-amps
• UAC 1.0/2.0 for gaming compatibility
• Auto power-off after 30 mins idle
📦 Box Contents:
• Fosi Audio ZH3
• 6.35mm Adapter
• 12V Trigger Cable
• IR Remote
• USB-A/C to USB-C Cable
• DC 12V Power Adapter
• User Manual
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Cable: 1-month warranty only for manufacturing defects only
Fosi Audio is a dynamic brand dedicated to providing the most comprehensive range of Hi-Fi audio products in the market. We cater to passionate audiophiles by offering Hi-Fi products, DIY kits, and expert guidance, ensuring an immersive audio experience. Beyond a mere transaction, we foster enduring relationships with our clients, supporting them throughout their audio journey.
Our diverse product lineup includes the Hi-Fi power amplifier, pre-amplifier, headphone amplifier, DAC, music player, Bluetooth receiver, DIY board, DIY chassis, and an array of DIY kits. These meticulously crafted offerings embody our commitment to exceptional sound quality and innovation.
Established in China in 2017, Fosi Audio was founded by a team of devoted audiophiles. Our products have gained significant popularity within the Chinese DIY audio community, amassing a large and dedicated following. To expand our reach beyond borders, we launched this website in 2017 and began offering a selection of products on Amazon under the name "Fosi audio." However, please note that many of our outstanding products are not yet available on this website or Amazon. If you cannot find what you're looking for, simply reach out to us via email, and we will be delighted to assist you in finding the perfect product to meet your needs.
At Fosi Audio, we are not just a brand; we are your partner in achieving audio excellence. Join us on this immersive sonic journey and experience the true essence of Hi-Fi audio.
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OUR HONEST REVIEWS FROM THE CO-FOUNDERS & AUDIOPHILES
View allTRUSTED BY OVER 50K+ MUSIC ENTHUSIASTS
Let customers speak for us
from 6602 reviews
GREAT Product under 2000,must buy
to be concise this is probably the best iem under 35k,
Pros:
- Sub bass and mid bass clarity, quality and volume is amongst the best, this is not a basshead iem but will definitely please a basshead.
- Mids are not recessed and are as accurate as they can be, however are not vocal forward per se but are slightly elevated compared to "v" shape iems, giving this iem a mild "W" shape signature.
-treble is good but for me was very much dependent on the tips I used, when using with sancai wide bores trebles were nice and clear, bright, might be too energetic for some, however with regular tips was perfectly tame and not sibilant to a point of discomfort and had decent air.
So use wide bores if you want to open up the iems, get a little better imaging and seperation but might make the highs a little too energetic, and with regular tips you get more boomy bass but might lose a little of the stage width but is better for treble sensitive folks.
Cons
Condensation issue might be there on rainy days, the wing style fit may not work for all, the iems are medium size and can fit many ear sizes especially with smaller tips but if you don't do well with wings or have atypical ears it may not be for you.
is reminiscent of new meta style tuning, so if you have iems with similar tuning this may be redundant.
Overall:
9/10 literally doesn't get much better than this whether you're putting in 5k more of 1 lakh more, this is the point of diminishing returns, atleast in my opinion, and from this price point on its mostly accesories or timings which actually make a difference.
fit and comfort was amazing for me, i have normal ears, with smaller canals, fits very well for me with small tips, but might have a few pressure spots depending on the ear.
build quality is very good with a nice metal shell.
The cable is very good and premium, accessories are good, and has a premium feel and looks beautiful with good presentation, over-all worth for the money, atleast for me lol.
however you may want to wait for more reviews on the hype 4 mark 2 and the new tea pro SE, and if you're a basshead the martillo is going to be potential endgame.
Very smooth, once you find the appropriate size it will work wonders.
Got the KZ Castor Pro (Harman Target + improved bass) and I’m honestly happy with it right now.
Bass hits nicely and feels punchy without covering up vocals.
Songs sound clean and balanced, and details come through pretty well.
Comfort is good for longer listening too.
Overall, feels totally worth the money.
* might update Review later If my views and experience changes
It's hard cast to secure your IEM and soft on inside to don't scratch the IEM & good space on in side
One year review: incredible audio quality, strong bass, clean highs, and no wear or tear. These IEMs are truly reliable
It's pretty good for the price, good bass and well maintained treble.
Okay, let's talk about this transparent protective case. If you own the MOONDROP ST2s, this case isn't an option, it's a must-buy. Why? Because the original charging case is lidless and instantly attracts dust and scratches!
Fit and Feel
The fit here is fantastic. It slides on perfectly—it's a snug fit with absolutely no loose gaps, which is exactly what you want. Even though it's super affordable, it feels like genuinely good quality in your hand.
Protection and Design
This protective case does its job perfectly: it seals up the whole unit, protecting the original case from dust and scratches. The magnetic lid on this new case works really well, too. You can shake it all you want, and it won't pop open, which is great insurance against the buds falling out of the original lidless design.
I love the look. The transparent design is super cool because it lets the charging case shine through and reflect its original form, all without adding any noticeable bulk.
Just a Quick Heads-Up
It's important to note that the protective case doesn't block the charging port. This means if you travel a lot, you'll still need to keep an eye on that port and clean it regularly to prevent dust buildup.
Final Verdict
My advice is simple: you need this case. Go buy it! Otherwise, you'll constantly be putting the ST2s in a separate IEM box just to protect them. Honestly, doing both—using the protective case and the IEM box—is the best bet for extra protection, which is what I'm doing now.
Okay, seriously, these little earbuds absolutely blew my mind.
The whole vibe, right from the moment I cracked open the box, felt super new and cool. Like, this isn't that same boring, generic crap you always get. The charging case? Totally unique! It looks awesome, but heads up: I can already tell it's gonna be a dust magnet. To keep mine fresh, I slapped a protective case on it immediately and keep the whole setup in a tiny IEM box for peace of mind. Just a pro-tip! Other than that, the actual earbuds fit like they were custom-made for my ears.
But the sound, man? That’s the whole reason to buy these. It’s just miles better than any regular Bluetooth headphone I’ve used. Everything is so dang clear! You can hear all the different instruments perfectly, like they’re standing in separate spots instead of being a messy blob. Oh, and download the app! You can tweak the settings to make them sound exactly how you like.
There are definitely other options out there in this price bracket, but these guys win, hands down.
That separation in the music? I felt it for the first time ever, and it made all my old playlists sound brand new. If you want that super crisp, detailed audio without emptying your wallet, you HAVE to try them. Huge step up! The volume is a little low, but honestly, the ANC (Active Noise Cancellation) covers that right up.
The Technical Bits
The controls are quick and easy to use, but they're super sensitive, so you might accidentally pause your music a couple of times while adjusting them. You'll get the hang of it, though.
For calls, they're fine in a quiet room, but you gotta speak up. If you're out near traffic, the person on the other end is definitely going to hear the cars more than you.
Watching videos? Zero lag. The low latency mode works perfectly for YouTube and Netflix sync. Sorry, I don't really game, so I can't tell you how they handle laggy mobile FPS games.
Battery life is decent—I got about five hours with the ANC constantly running.
Just a heads-up: If you already own a wired IEM, don't bother with these. Wired is just way better. I'm only just starting my journey into audiophile stuff, and I can already tell you: wired beats wireless every time.
P.S. Huge shoutout to The Audio Store for the crazy fast shipping and good packaging! Definitely buying from them again soon.
Awesome Product!
Absolutely bang for the buck. Best beginner IEM under 2000 Rs and I am not even kidding or exaggerating.
This is my second KZ EDC pro set actually. I ordered it for my brother because I like it a lot. If you want for gaming or on limited budget, definitely buy it. It can be driven buy any normal 3.5mm device, but buy a dongle DAC if you can it will enhance your experience with cleaner sound.
Read the detailed review below.
The tuning is lot balanced with slight V shape is how everyone describes it. So far from friends, I got to try Moondrop chu II, Tangzu Wan'er SG 2, Blon bl03 I, KZ ZSN pro X and KZ EDC pro(my own) all with DAC (for first three it was with Audiocular spark). I will say I prefer EDC pro over all of these. Might sound like a madlad here preferring a 700rs IEM over ~2000 rs IEM but it's just that good.
Tuning: It comes to preference, but what's good is it is not the usual KZ like tuning, and it's V shape enough to enjoy but not too much to crush all details. It's tuning is close to moondrop chu II I would say, and Blon bl03 if you reduce sharpness of the treble. Or other way to describe would be little more bass than Tangzu Wan'er SG 2. But it does feel little sharp sometimes on highest volumes with something like trumpets playing.
Technicalities: I am a noob, yes. But from my understanding, it's very head to head with tangzu wan'er SG 2 and blon bl03 in terms of soundstage. Well, in busy tracks seperation (I listen to J-pop a lot), all of the IEMs I tested so far have failed (the best set I could experience was Fiio ft1 pro open back, so my judgement of seperation and soundstage comes according to that). And a heads up, its sensitivity is high, so it will produce hissing noise with DACs that have Amp chip with higher noise flour than it's sensitivity.
Cons:
1. It starts to struggle at higher volumes, becomes little sharp (ear piercing treble) with things like trumpet, but again you will never require higher than 60-70% in quite listening.
2. Other IEMs in under 2k range have smaller sizes, this one is just way bigger in the ears, but due to that it's a snug fit. People with smaller ears will find it way bigger.
Thanks for reading!
Also thanks for the audio store team for cooperating about the Spark DAC hissing issue even when it was clearly my mistake. It seems it's not publicly known that IEM sensitivity should be checked before buying a dongle DAC+Amp.
Great headset for comfort and neutral sound. The headband is excellent and fits my large head with no issues and the pads are isolating and comfortable too. The sound is basically neutral, the bass is present and textured but not boosted by much. Mids are spectacular and tame but not recessed at all. The treble brings the mids out even more without harshness and is pretty well extended at least to the uppertreble. Air frequencies are somewhat subdued but still not a problem for the sound. The treble is just a bit emphasized as it's oriented for mixing, so for casual listening it's a little sharp but it's my preference that way. If you're okay with a set that brings out details through Treble you'll like this.
real good product must buy if have good iems.;D
Best IEMs
Quality of their products are excellent and great customer support









