Fosi Audio SK01 Headphone Amplifier & Preamplifier 2 in 1 for Headphone Earphone, Power Amplifier, Active speakers

Fosi Audio SK01 Headphone Amplifier & Preamplifier 2 in 1 for Headphone Earphone, Power Amplifier, Active speakers

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Features:

The SK01 is a high-power headphone amplifier with tone controls (treble,middle and bass), high and low gain settings, bypass mode, and loudnessfunction. The tone control feature allows you to customize the sound to your preferences and compensate for any shortage in your headphones or audio system. The high and low gain settings are suitable for headphones with different impedance. The bypass mode provides a pure reproduction of the original sound. The loudness function allows you to immerse yourself in the world of music during quiet nights.

Highlight:

Model: SK01

Input : 3.5MM line in

Output : 3.5mm Headphone, 6.35mm Headphone, 3.5MM line out

Powe Supply:5V

Power Input Interface: USB Type-C

THD: < 0.001% @ 1kHz and 770mV

SNR: ≥108dB

Frequency response: 20Hz-20kHz (±0.5dB)

Amp output maximum power: High Gain: RMS 2400mw/ 32Ω, Low Gain: RMS 300mw/32Ω

Headphone matching impedance: 16-300Ω

Size (L*W*H): 4.76*2*1.69inch (121*51*43mm)

Net Weight: 0.641b/290g

Package Include:

*1x Fosi Audio Sk01 Headphone Amp

*1x 2-in-1 USB Type-A/C to Type-C Cable

*1x User’s Manual

QA

1.What are the charging time and battery life of the SK01?
It takes approximately 2-3 hours to fully charge the battery, and once charged, it can provide up to 6 hours of continuous usage at the low gain setting, with the volume control set to the middle and the tone controls turned off. Although enabling the tone controls may slightly increase battery consumption, the overall battery life is still impressive, allowing for a full day of heavy usage or a couple of days of moderate usage. Additionally, if you prefer to use the device on your desktop, you can keep it plugged into the charger continuously,

Q2：Why isn't the USB input on SK01 working?
The SK01 Only supports USB powering and a 3.5mm aux input.

Q3：Can SK01 be used while charging?
The SK01 runs on battery power whether or not the Type-C cable is plugged in. Keeping it plugged in for long periods may reduce battery lifespan, similar to using a phone while it’s always connected to a charger. We recommend unplugging the cable once fully charged and recharging when the battery is low.