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  • VIDEO
Fosi Audio SK01 Headphone Amplifier Equalizer PreampFosi Audio Factory
  • Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp with 3.5mm 6.35mm Jacks
  • To view this video download

Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp with 3.5mm 6.35mm Jacks

4.5 4.5 out of 5 stars (210)

To see the product details, add this item to your basket. You can always remove it later.
FREE Returns
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Voucher valid until Sunday, 9 February 2025 or while stocks last.

Purchase options and add-ons

Brand Fosi Audio
Colour silver
Compatible devices Double Bass, Guitar
Material Aluminum Alloy
Output wattage 2400 Watts

About this item

  • Combo Design: Whether as a powerful headphone amp, a customizable analog preamp, or an acoustic equalizer for the instrument, it effortlessly elevates your listening experience, delivering exceptional sound quality and personalized sound signatures.
  • Tri-Band Control: By enabling adjustments for treble, midrange, and bass, in conjunction with central detents for tone-defeating, achieving the ideal equilibrium becomes effortless. Up to 2400mW power is available in high impedance mode.
  • Diverse Capabilities: Instantly restore original sound with the one-click tone-defeating button; Immerse yourself in music during the quiet hours using the loudness function; Tailor the gain level to accommodate headphones with various impedances through the gain level switch.
  • Superb Finishing: The aluminum alloy body showcases meticulous attention to details. Built-in 2500mAh battery, up to 6 hours of battery life. It offers versatile connectivity through the 3.5mm & 6.35mm headphone jacks (32-300 ohms), serving as both a portable and desktop headphone amplifier.
  • What You'll Get: Fosi Audio SK01 Headphone Amp x1, User Manual x1, 2-in-1 USB Type-A/C to Type-C Cable x1, a 24-month worry-free warranty and responsive customer service.

Frequently bought together

This item: Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp with 3.5mm 6.35mm Jacks
£81.99
Get it as soon as Saturday, Feb 1
In stock
Sold by Fosi Audio Factory and sent from غ Fulfillment.
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£142.47
Get it as soon as Saturday, Feb 1
In stock
Sold by POLAR - Official UK Distributor and sent from غ Fulfillment.
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Product Description

Fosi Audio SK01 Headphone Amplifier/Preamp

Fosi Audio SK01 Headphone Amplifier/Preamp

A multi-functional audio gear for desktop and portable music playing and tone tuning.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Tailor the Sound to Your Preference


With treble, middle, and bass adjustments capabilities, combined with central point positioning, you can easily find the perfect balance. Additionally, you can effortlessly defeat all the tone adjustments with just a click on the PURE button.

  • Input: 3.5mm line in
  • Output: 3.5mm line out, 3.5mm/6.35mm headphone jack
  • Max Power Output: RMS 2400mW@32Ω
  • Terminating Impedance: 16-300Ω

Fosi Audio SK01 Headphone Amplifier/Preamp

6-Hour Battery Life

With a built-in high-capacity battery and isolated power design to reject interference, it ensures a pure listening experience without break off.

Fosi Audio SK01 Headphone Amplifier/Preamp

Aluminum Alloy Body

The full-metal body is exquisitely crafted, both in appearance and touch, adding a touch of elegance to your desktop.

Parameter Comparison

SK01

SK01

SK02

SK02

PH05

PH05

P2

P2

K5 PRO

K5 PRO

Q4

Q4

DS1

DS1

Customer Reviews
4.5 out of 5 stars
210
4.3 out of 5 stars
118
4.4 out of 5 stars
32
4.3 out of 5 stars
412
4.2 out of 5 stars
825
4.4 out of 5 stars
2,845
4.3 out of 5 stars
283
Type
Headphone Amp+Equalizer Headphone Amp+Equalizer 5.0 CH Headphone Amp Headphone Amp + Preamp DAC+ Headphone Amp DAC+ Headphone Amp DAC+ Headphone Amp
MAX Power Output
2400mW@32 Ohm 3.5MM: 280mW; 4.4MM: 1100mW 310mW@32 Ohm/36mW@300 Ohm 120mW@32 Ohm - - 120mW(SE); 220mW(BAL)
Input
3.5mm AUX USB/OPT 3.5mm AUX AUX + RCA USB-C+OPT+COA+Microphone USB + Optical + Coaxial Type C+ USB A
Output
3.5mm AUX+6.35mm Headphone 3.5mm/4.4mm HP+3.5mm AUX/OPT 3.5mm Headphone*5 3.5 mm + 6.35 mm RCA + 3.5mm Headphone RCA + 3.5mm Headphone 3.5mm + 4.4mm Headphone
Treble & Bass Control
THD
≤ 0.001% ≤ 0.001% 0.001% ≤ 0.03% <0.003% ≤ 0.01% ≤ 0.0006%(SE) ≤ 0.001%(BAL)
SNR
≥ 108dB 3.5mm: 120dB; 4.4mm: 115dB 105db ≥ 95dB >110dB ≥ 105dB ≥120
Terminating Impedance
16-300 Ohms 16-300 Ohms 16-300 Ohms 16-300 Ohms 16-300 Ohms 16-200 Ohms 16-300 Ohms

From the brand

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What's in the box?

  • Fosi Audio SK01
  • Product guides and documents

    Product details

    • Product Dimensions ‏ : ‎ 12.09 x 5.08 x 4.29 cm; 422 g
    • Date First Available ‏ : ‎ 24 Sept. 2023
    • Manufacturer ‏ : ‎ Fosi Audio
    • ASIN ‏ : ‎ B0CF1WL1V2
    • Item model number ‏ : ‎ SK01
    • Country of origin ‏ : ‎ China
    • Guaranteed software updates until ‏ : ‎ unknown
    • Delivery information:: We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
    • Customer reviews:
      4.5 4.5 out of 5 stars 210 ratings