Fosi Audio SK01 Headphone Amplifier & Preamplifier

Regular price
$79.99 USD
Sale price
$79.99 USD
Regular price
$79.99 USD
Tax included. Shipping calculated at checkout.
  • Tri-Band Adjustment for Personality
  • Two Gain Modes to Adapt 
  • The built-in high-capacity battery
  • Perfectly combinable with SK02



Specifications Details
Model SK01
Input 3.5MM line in
Output 3.5mm Headphone, 6.35mm Headphone, 3.5MM line out
Amp output maximum power High Gain: RMS 2400mw/ 32Ω,Low Gain: RMS 300mw/32Ω
Frequency Range 20Hz-20kHz (±0.5dB)
THD+N 0.001% @ 1kHz and 770mV
SNR ≥108dB
Headphone matching impedance 16-300Ω
Device Dimension 4.76*2*1.69inch (121*51*43mm)
Net Weight 0.641b/290g
Power Supply 5V, USB Type-C

Use a 5V 1.5A/2A adapter to charge it.

What‘s in the box?

Item Quantity Fosi Audio Sk01 Headphone Amp x 1, 2-in-1 USB-A/C to C Cable x 1, User’s Manual x 1

SK01 User Manual

Customer Reviews

Based on 7 reviews
John Granato
Great upgrade

I wish that I had done this sooner. I was using some old Sony MDR-V600 headphones with my even older Technics SA-GX100 receiver. They never sounded very well together. So, I just stored the headphones for 20 years. Then, a friend told me about your amp and how it would work with the mis-matched impedance ratings of my components. So, I contacted your company and got great advice. Because of this, I purchased your amp, put new muffs on my cans, and I am tickled by how good they sound. Thanks a Million!

scott onsax
fosi headphone amp works well with my laptop and musical applications

clean sound, provides for easy to reach control (volume and tone) of my laptop audio when performing on stage. usb power from the laptop is one less cable problem. 1/4 inch and 3.6 mm in/outs are good design. nice price/value ratio.

Zoran Jankovic

A very useful multipurpose product. An excellent preamplifier for adjusting the sound according to the user's wishes. It works perfectly as a headphone amplifier and as an equalizer...

Superb Product & Fast Delivery

Delivered the product in 15 days internationally.

Trent Marshall
Fosi SK01

Fast delivery from Fosi. Feels well built and has definitely added the needed control for when I'm driving different headphones

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