Audio SK02 USB DAC Headphone Amplifier 3.5 & 4.4mm

Portable USB DAC and Headphone Amplifier for Clear, Powerful Sound

The Audio SK02 USB DAC Headphone Amplifier is designed for listeners who want desktop‑grade audio from laptops, tablets, and smartphones. With support for high‑resolution DSD256 and PCM formats, it converts digital audio into a clean, detailed analog signal while providing enough power to drive a wide range of wired headphones.

Equipped with both 3.5mm single-ended and 4.4mm balanced headphone outputs, the SK02 offers flexible connectivity for everyday IEMs as well as more demanding over‑ear headphones. The 3.5mm output delivers up to 280 mW @ 32Ω on high gain and 90 mW @ 32Ω on low gain, while the 4.4mm balanced output can reach up to 1100 mW @ 32Ω on high gain and 350 mW @ 32Ω on low gain. This allows you to match the output to sensitive in‑ears or higher‑impedance headphones with ease. Gain options help you optimize volume control range and minimize noise with different types of headphones.

The SK02 connects via USB to compatible devices such as Windows and macOS computers, many Android phones and tablets (with appropriate adapters), and other USB audio sources. Once connected, it functions as an external sound card and headphone amplifier, bypassing the often limited built‑in audio hardware. The internal DAC and amplifier stage are tuned to deliver improved separation, better dynamics, and more precise imaging, so music, films, and games all benefit from clearer detail and more controlled bass. Its compact form factor and durable housing make it suitable for desktop use or travel, fitting easily into a bag or pocket.

Why It's a Smart Choice

• High-resolution decoding with DSD256 and PCM support for more accurate, detailed playback.
• Dual outputs (3.5mm and 4.4mm balanced) with selectable gain to match a wide variety of headphones.
• USB connectivity and compact design for convenient use with computers and mobile devices at home, in the office, or on the go.

FAQ

Q: Which headphones work best with the Audio SK02?
A: The SK02 is suitable for most wired headphones and IEMs that use either a 3.5mm single-ended or 4.4mm balanced plug. Use low gain for sensitive in‑ears and high gain for higher‑impedance or less sensitive over‑ear models.

Q: Do I need special drivers for my computer?
A: Many systems will recognize the SK02 as a standard USB audio device. Some operating systems may offer optional drivers for advanced settings or higher sample rates; check your device's audio settings after connection.

Q: Can I use it with my smartphone?
A: The SK02 can work with many Android smartphones and tablets that support USB audio output. Depending on your device, you may need a USB‑C OTG or other compatible adapter. iOS devices may require an appropriate Lightning or USB‑C audio adapter.

Q: Does it only increase volume, or does it also improve quality?
A: Beyond higher output levels, the SK02 provides a dedicated DAC and amplifier stage that can improve clarity, channel separation, and dynamic range compared with typical built‑in headphone jacks.