Fosi Audio SK01 Kopfhörerverstärker und Preamp

gain switch
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Product details

Whether as a powerful headphone amplifier, customizable analog preamplifier, or acoustic equalizer for your instrument – the Fosi Audio SK01 effortlessly enhances your listening experience, delivering exceptional sound quality and personalized sound signatures. With the ability to adjust treble, mids, and bass, the most suitable sound profile can be easily set. In high impedance mode, up to 2400 mW of power is available. Instant restoration of the original sound is possible with the one-click tone-defeating button. Adjust the gain level to accommodate headphones with different impedances via the gain stage switch. The aluminum alloy casing showcases meticulous attention to detail. The built-in 2500 mAh battery offers up to 6 hours of battery life. Versatile connectivity is provided through the 3.5 mm and 6.35 mm headphone jacks (32 - 300 Ohm). The SK01 is well-suited as both a portable and desktop headphone amplifier.

Key specifications

Scope of application
PCPortable
Power supply
Rechargeable battery operated

General information

Item number
59881671
Manufacturer
Fosi Audio
Category
Headphone amplifiers
Manufacturer No.
SK01
Release date
1.7.2025
Sales rank in Category Headphone amplifiers
14 of 343

Colour

Colour
Black
Exact colour description
Black

Headphone amplifier properties

Scope of application
PCPortable
Headphone Amplifier Features
gain switch

Connections

Audio outputs
Headphone jack 3.5mm (1x)Headphone jack 6.3mm (1x)

Power supply

Power supply
Rechargeable battery operated

Battery properties

Battery life
6 h

Voluntary climate contribution

CO₂ emissions
50.38 kg
Climate contribution
CHF 1.20

Scope of delivery

Scope of delivery
USB cable

Product dimensions

Length
121 mm
Width
51 mm
Height
43 mm

Package dimensions

Length
19.60 cm
Width
14.10 cm
Height
7.30 cm
Weight
439 g

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Headphone amplifiers» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Fosi Audio
    Not enough data
  • 1.Behringer
    0.3 %
  • 2.iFi Audio
    2.4 %
  • 3.FiiO
    3.1 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • Fosi Audio
    Not enough data
  • 1.FiiO
    0 days
  • 2.iFi Audio
    5 days
  • Behringer
    Not enough data

Return rate

How often is a product of this brand in the «Headphone amplifiers» category returned?

Source: Digitec Galaxus
  • 1.Behringer
    1.3 %
  • 2.Fosi Audio
    6.3 %
  • 3.FiiO
    6.6 %
  • 4.iFi Audio
    9.8 %
Source: Digitec Galaxus