1. Professional Tone Control & Analog Warmth The Fosi Audio SK01 is a high-power headphone amplifier and analog preamplifier designed... Read more
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The Fosi Audio SK01 is a high-power headphone amplifier and analog preamplifier designed for listeners who want full command over their sound. Unlike digital EQs, the SK01 offers a pure analog signal path, allowing you to sculpt your audio with tactile precision while adding a touch of musical warmth to any source.
Precision Tone Sculpting: Equipped with physical knobs for Bass, Middle, and Treble, the SK01 lets you compensate for headphone deficiencies or tailor the sound to your genre.
Loudness Function: A dedicated Loudness switch enhances low and high frequencies at lower volumes, ensuring a full-bodied listening experience even during quiet sessions.
Massive Output Power: The SK01 delivers up to 2400mW @32Ω (High Gain), providing enough headroom to drive demanding high-impedance headphones (up to 300Ω) and low-sensitivity planar magnetics.
Dual Gain Modes: Easily switch between High and Low gain to optimize the performance for everything from sensitive In-Ear Monitors (IEMs) to power-hungry over-ear cans.
Multi-Function Interface: Features a 3.5mm Line Input and both 3.5mm and 6.35mm headphone outputs, allowing it to function as a standalone amp or a preamplifier for active speakers.
Long-Lasting Battery: The built-in 2500mAh rechargeable battery provides up to 6 hours of high-power use, making it an essential companion for both desktop and mobile setups.
| Component | Specification |
| Input Type | 3.5mm Line In |
| Output Type | 3.5mm & 6.35mm Headphone Out, 3.5mm Line Out |
| Max Power Output | 2400mW @32Ω (High Gain) |
| Compatible Impedance | 16Ω - 300Ω |
| SNR / THD+N | 108dB / 0.001% |
| Battery Life | Approx. 6 Hours |
| Chassis Material | CNC Machined Aluminum Alloy |
The Fosi Audio SK01 is the perfect solution for audiophiles who find modern digital audio too "flat." Its ability to function as a tone-shaping preamp makes it a unique tool in the Hi-Fi chain. Whether you're adding punch to your gaming headset or warmth to your studio monitors, the SK01 delivers professional-grade control in a sleek, aluminum package.
Choose the SK01 if you already have a DAC or use an analog source and want massive driving power and the ability to manually adjust EQ (Bass/Mid/Treble). It is also the only choice if you need a portable battery-powered unit.
Choose the SK02 if you need an all-in-one digital solution to connect your PC or phone via USB. It offers superior detail through its high-end ESS DAC and supports balanced 4.4mm headphones, which provides a cleaner signal.
