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	4.7621.69inch (1215143mm)
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

SK02 Windows 7 Drivers

Study & Home Office

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