Description
Premium Sound Decoding: Experience unparalleled audio quality with the SK02, featuring the premium ES9038Q2M 32-bit DAC chipset. Decode high-resolution 32-bit/384kHz PCM and native DSD256 audio signals for a superior listening experience.
Super Powerful, Drive Headphones With Ease: Equipped with the SGM8262 Opamp chipset, the SK02 delivers a robust and powerful output, capable of driving headphones and IEMs with ease. Its two-level gain modes ensure compatibility with a wide range of audio equipment, from 16Ω to 600Ω impedance.
Minimalistic Design, Solid Build: Crafted with a compact aluminum alloy chassis, the SK02 boasts a sleek and minimalistic design. Its solid build ensures durability while its compact footprint allows for easy integration into any setup.
USB and Optical Inputs: Connect the SK02 to your preferred source device using either USB Type-C or Optical inputs. Power the device directly from your source device via USB or opt for optical input for enhanced amplification.
Multifunction Infinite Knob and LED Indicators: Easily control volume and playback with the multifunction infinite knob and vibrant LED indicators. Rotate the knob for volume adjustment or tap for play/pause functionality, all while keeping track of the active bitrate and device status with the LED indicators.
Model: SK02
Input: USB/OPT
Output: 3.5mm Headphones,4.4mm Headphones,3.5MM line out/OPT
Amp output maximum power-
3.5MM:
High Gain: 280mW@32Ω, 130mW@64Ω, 40mW@250Ω, 30mW@300Ω
Low Gain: 90mW@32Ω, 50mW@64Ω, 15mW@250Ω, 10mW@300Ω
4.4MM:
High Gain: 1100mW@32Ω, 550mW@64Ω, 150mW@250Ω, 120mW@300Ω
Low Gain: 350mW@32Ω, 180mW@64Ω, 50mW@250Ω, 40mW@300Ω
Frequency Range: 20Hz-20kHz (±0.02dB)
THD: ≤0.001% @ 1kHz
SNR 3.5mm Headphone:
Low Gain:116dB
High Gain:120dB
4.4mm Headphone:
Low Gain:110dB
High Gain:115dB
Headphone matching impedance: 16-300Ω
PC-USB Sampling Rate: 32Bit/384KHz DSD256
OPT Sampling Rate: 24Bit/192KHz
DAC Chip: ES9038Q2M
Device Dimension: 4.76*2*1.69inch (121*51*43mm)
Net Weight: 0.84lb/380g
Power Supply: 5V, USB Type-C
In The Box
Item Quantity Fosi Audio Sk02 Headphone Amp x 1,
2-in-1 USB-A/C to C Cable x 1,
User’s Manual x 1
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.
The fit and finish of the SK02 is exceptional for a budget oriented DAC. The mode switches and volume knob gives a satisfying mechanical feel to the operation of the DAC. The balanced 4.4mm output is a huge plus on these and not a common option on the similar products like ifi uno, topping and smsl DACs.
Thank you for taking the time to leave a review for the Fosi Audio SK02 Desktop DAC & Headphone Amplifier. We're glad to hear that you are pleased with the fit and finish of the product, and that the mode switches and volume knob provide a satisfying mechanical feel. Thank you for choosing Fosi Audio & The Audio Store, and we hope you continue to enjoy your SK02.

Description
Premium Sound Decoding: Experience unparalleled audio quality with the SK02, featuring the premium ES9038Q2M 32-bit DAC chipset. Decode high-resolution 32-bit/384kHz PCM and native DSD256 audio signals for a superior listening experience.
Super Powerful, Drive Headphones With Ease: Equipped with the SGM8262 Opamp chipset, the SK02 delivers a robust and powerful output, capable of driving headphones and IEMs with ease. Its two-level gain modes ensure compatibility with a wide range of audio equipment, from 16Ω to 600Ω impedance.
Minimalistic Design, Solid Build: Crafted with a compact aluminum alloy chassis, the SK02 boasts a sleek and minimalistic design. Its solid build ensures durability while its compact footprint allows for easy integration into any setup.
USB and Optical Inputs: Connect the SK02 to your preferred source device using either USB Type-C or Optical inputs. Power the device directly from your source device via USB or opt for optical input for enhanced amplification.
Multifunction Infinite Knob and LED Indicators: Easily control volume and playback with the multifunction infinite knob and vibrant LED indicators. Rotate the knob for volume adjustment or tap for play/pause functionality, all while keeping track of the active bitrate and device status with the LED indicators.
Model: SK02
Input: USB/OPT
Output: 3.5mm Headphones,4.4mm Headphones,3.5MM line out/OPT
Amp output maximum power-
3.5MM:
High Gain: 280mW@32Ω, 130mW@64Ω, 40mW@250Ω, 30mW@300Ω
Low Gain: 90mW@32Ω, 50mW@64Ω, 15mW@250Ω, 10mW@300Ω
4.4MM:
High Gain: 1100mW@32Ω, 550mW@64Ω, 150mW@250Ω, 120mW@300Ω
Low Gain: 350mW@32Ω, 180mW@64Ω, 50mW@250Ω, 40mW@300Ω
Frequency Range: 20Hz-20kHz (±0.02dB)
THD: ≤0.001% @ 1kHz
SNR 3.5mm Headphone:
Low Gain:116dB
High Gain:120dB
4.4mm Headphone:
Low Gain:110dB
High Gain:115dB
Headphone matching impedance: 16-300Ω
PC-USB Sampling Rate: 32Bit/384KHz DSD256
OPT Sampling Rate: 24Bit/192KHz
DAC Chip: ES9038Q2M
Device Dimension: 4.76*2*1.69inch (121*51*43mm)
Net Weight: 0.84lb/380g
Power Supply: 5V, USB Type-C
In The Box
Item Quantity Fosi Audio Sk02 Headphone Amp x 1,
2-in-1 USB-A/C to C Cable x 1,
User’s Manual x 1
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.
The fit and finish of the SK02 is exceptional for a budget oriented DAC. The mode switches and volume knob gives a satisfying mechanical feel to the operation of the DAC. The balanced 4.4mm output is a huge plus on these and not a common option on the similar products like ifi uno, topping and smsl DACs.
Thank you for taking the time to leave a review for the Fosi Audio SK02 Desktop DAC & Headphone Amplifier. We're glad to hear that you are pleased with the fit and finish of the product, and that the mode switches and volume knob provide a satisfying mechanical feel. Thank you for choosing Fosi Audio & The Audio Store, and we hope you continue to enjoy your SK02.
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OUR HONEST REVIEWS FROM THE CO-FOUNDERS & AUDIOPHILES
View allTRUSTED BY OVER 35K+ MUSIC ENTHUSIAST
Let customers speak for us
from 4822 reviews
Time Spent with this DAP is more than 50 days, used many IEMs from Budget range to high end.
OBSERVATION & EXPERIENCE SO FAR.
- Wide soundstage, it's creating a spacious listening experience.
- Smooth and refined sound, with good bass & trebles. I liked it.
- little high Volume doesn't hurt ears because of spaciousness which this DAP creates.
- Main unique point is Vocals & Instruments separation, it's best.
- So far, I noticed Battery back up is really good. Will check it over time and provide feedback.
- Does not get warm that too after using for hours.
- Best software & Shanling Music app, it's very fast ( I use 1TB fully loaded Micro SD card.)
Please Note - Little more care is needed while handling as it has Glass tubes. Again it's unique offering & tubes makes music more enjoyable.
CONS-
1. Charging time ( it will get solve by software updates in future, Brand has co
nfirmed it in their post)
2. Only one colour option is available from Brand.
3. Some settings currently not present, Brand may add in future updates ( DSD gain Compensation, PEQ, MSEB, Night light short cut in quick pannel)
CONCLUSION-
a. Highly recommend those who want detailed & immersive experience.
b. THREE IN ONE- One DAP but three modes, all three sounds differently. One mode Transistor (without Tubes) and two Tube modes (Triode & Ultra- linear).

Sterdy & beautiful cable. I am using it with Hidiz MP145 Planner Magnetic IEM. It add details to music over stock cable. Makes all aspect of sound quality better.

I am writing review after One month regularly uses with my two DAP - Shanling M8t, Hiby R4.
POSITIVES-
1. Best Soundstage
2. Balanced sound
3. Musical & Makes music more enjoyable to ears.
4. No fatigue despite of metal construct.
5. Weight distribution is really good.
6. Largest Magnetic planner in the Category.
7. Details & instruments separation at best.
CONS-
1. Small ears may face challenge. Plz contact team ATS before purchase. Normal ear size, No issues with fit & long usage.
2. Stock cable is good but doesn't suit this IEM.
I am using this with Divinus Auram cable, which goes really well with this by appearance as well as by performance.
CONCLUSION-
1. Very very happy with the purchase. It's my main IEM in daily music journey.
2. My suggestion is Music enthusiast must have atleast one 'Planner Magnetic IEM', believe me I found that the the songs which I am listening since decades are sounding differently with some more details with this IEM.

The KZ Castor is an excellent choice for budget audiophiles. It delivers superb sound quality that rivals much more expensive headphones, with clear highs, rich mids, and deep bass. The build quality is solid, offering both durability and comfort for long listening sessions. At its price, it’s a fantastic value, outperforming many premium options. Highly recommended!

i think it's a great choice for someone who's just starting with the "iem" audiophile thing and it sounds good pretty good for the price range, it's sound clear and crisp, the bass is a little on the lower side but nonetheless great product if you are just starting, oh and yes the delivery was fast got it in a day.

Delivery was fast and item received was in good condition

Lets get to the point, its the best budget IEM!
I have been in the IEM space for more than 6 months and I was looking for a daily driver that can handle rough use, and then Pritam Sir suggested me 7Hz G1. And it failed to disappoint me!
A nice high quality well built iem, with one of the best ergonomic design, and a proper sound isolation with tons of tip to choose from.
The iem is well tuned with proper instrument seperation and clarity, warm tuning with perfect bass and excellent soundstage compared to other budget IEMs.
If you are new to yo IEM and want to buy your first IEM, blindly go with this! Trust me you would not regret! For 3.2k, its a steal deal!
(Pro Tip: Always listen to Pritam Sir's suggestions. He is the G.O.A.T)

We had an amazing experience at The Audio Store. Pritam, the shop expert, was incredibly helpful and knowledgeable. He patiently guided us through the world of in-ear monitors, explaining all the details and helping us understand what would work best for our band, Rhythm Freak. He suggested options that perfectly matched both our budget and our musical needs, making sure we got the best value without compromising on quality. Thanks to his expertise, we walked out confident and satisfied with our purchase. Highly recommend this store to any musician looking for top-notch gear and excellent service

Sound quality ausom but not for base lover's

Top notch earphone Mike quality 🔥.gaming, music etc highly recommend ❤️🎧

I believe this is the best tws under 10000 rupees also it is an iem

Thank you audio store. The sound is amazing. It was delivered within time and product was perfect.

Very detail iem for the price not bass heavy

It is compact and yet have a good punch to the output it gives, the packaging was very impressive for the price.

Twilight from Soft Ears seems to me like a benchmark for single DD IEMs. The solid metal craftsmanship is commendable and when it comes to the sound, tonality, song signature and quality is presently benchmark for Single DD IEMs, may be rivalled by the Elder turii ti, which cost 3x of this.