Fosi Audio SK02 Desktop DAC/Headphone Amp
- Regular price
- $19.99 USD
- Sale price
- $19.99 USD
- Regular price
-
- Compact Yet Powerful: The SK02 employs a minimalist and stylish design language. Despite its small size, it boasts mighty features. It supports DSD256 and PCM 32bit/384kHz high-resolution decoding, along with 3.5mm single-ended and 4.4mm balanced headphone outputs. Its robust power can easily drive a wide range of headphones and IEMs with an impedance range of 16-300 ohms.
- Stunning Performance: It features a high-end ESS SABRE ES9038Q2M DAC and SGM8262 op-amps. Its excellent circuit design ensures superior parameters with a SNR as high as 120dB, a low noise floor of only 3.7μV, and an incredibly low THD of 0.001%. The 4.4mm balanced output power reaches an impressive 1100mW at 32 ohms. The exceptional high-resolution capability and pure sound quality make every listening experience an extraordinary sensory journey.
- User-Friendly Design: The SK02 requires no drivers and offers plug-and-play convenience. It integrates a big multi-functional control knob, allowing easy access to power on/off, play/pause, and volume adjustments. The unit features quick-switch buttons for high/low gain and input modes. Additionally, its colorful indicator lights enable effortless identification of the current working mode and the song's sampling rate.
- Remarkable Versatility: Supports USB and optical input, widely applicable for decoding with computers, laptops, CD players, TVs, and projectors. Not only can it function as a headphone amplifier, but it can also serve as a preamp, pairing with active speakers or an amplifier like Fosi Audio V3, ZA3, TB10D amp, and passive speakers to form a desktop listening or home audio system.
- Exquisite and Durable: The SK02 is crafted from a single piece of aluminum alloy using CNC machining and a delicate sandblasting process. This not only gives it an exquisite appearance but also ensures lasting durability. In addition, Fosi Audio pledges to provide a 24-month worry-free warranty and responsive customer service to all users.
| Specifications | Details |
|---|---|
| Model | SK02 |
| Input | USB/OPT |
| Output | 3.5mm Headphone,4.4mm Headphone,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 |
What‘s 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
SK02 User Manual
Used with Hifiman Sundara and the sound is SO amazing clear big sound stage but lacks sub bass and fixed with equalizer apo and now every thing rocks.
Make sure to use balanced cable with sundara cuz the cans will vibrate your brain !
Quite powerful and superb resolution!
Recently I purchased this amp directly from Fosi Audio at discounted price. I received it in India on 10th day. I checked this produced using my I Mac , Sennheiser HD 660S2 HI Resolution balanced wired headphone. Quality of sound is excellent. Before that I was using Bose QC 35 , noise cancelling amp directly connecting to Mac through Bluetooth. When I compared both systems, results are un comparable. Sound quality drastically improved with wired and balanced input through DAC. I am also listening internet radio through this DAC. Quality of sound further changed . I recommend this product for true music lovers.
My disappointment is that the SK02 will not play .dsf files natively and light the proper LED. Every sample rate of DSD I've tried (DSD64, DSD128, DSD256) switches to DoP at 384kHz PCM. My other favorite DAC is an SMSL C200 which I've used with both foobar2000 and Volumio. The C200 correctly shows the DSD sample rates from both foobar2000 and Volumio. From the ESS 9038Q2M data sheet, it clearly supports DSD. If you have any suggestions, please contact me.
My other lesser disappointment is that the SK02 does not play 88.2kHz, 176.4kHz or 352.8kHz PCM files at their native resolution. Each of those gets transcoded to 96kHz, 192kHz and 384kHz respectively.
I like the form factor, the sound is fine, customer service is great, but these shortfalls keep me from giving an excellent review. I own another Fosi product and think very highly of your company, so was not expecting these deficiencies. In fact there was some kind of shipping problem that two of your people sorted out. Both Carl and Mark finally got the SK02 shipped to me about 2 weeks late. I thank them for their actions.
Please, if you have any suggestions or updates I can apply to the SK02 firmware, I'm ready to work at it.
Regards,
Dennis Yantz
Order #19553
Through some glitch, the order wasn’t processed properly and I am unfortunately still waiting for the device. The good news is that FOSI was able to find and correct the error and I should have a device soon….