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Product Description

  • 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.

Product Description

Fosi Audio SK01 Headphone Amplifier/Preamp

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

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
  1. Tri-Band Adjustment for Personality

    Tailor the treble, middle, and bass with the knobs to find the perfect balance.

  2. Loudness Function for More Pleasure

    Activate it to get a more balanced listening experience at lower volume levels.

  3. Two Gain Modes to Adapt Your Headphones

    Achieve the best performance by selecting the right gain level to fit different impedance.

  4. Compatible with 3.5mm/6.35mm Headphones

    Maximum 2400mW power to drive your 32-300Ω single-ended headphones with extraordinary performance.

1 Tri-Band EQ 2 Loudness 3 Gain Levels 4 Headphone Jacks
  1. As a Headphone Amp

    Drives any of your headphones easily and enrich the listening experience.

  2. As an Analog Preamp

    Modifies the characteristic to get your beloved sound.

  3. As an Equalizer

    Delivers accurate sonic detail for acoustic instruments.

1 Scenario 1 2 Scenario 2 3 Scenario 3
1 Buttons 2 Knobs 3 Side 4 Front & Rear

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.

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

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Customer Reviews
4.6 out of 5 stars
69
4.4 out of 5 stars
9
4.2 out of 5 stars
488
4.3 out of 5 stars
2,587
4.3 out of 5 stars
317
4.0 out of 5 stars
40
4.2 out of 5 stars
151
Price
$119.99$119.99 $159.99$159.99 $89.99$89.99 $79.99$79.99 $69.99$69.99 $99.99$99.99 $129.99$129.99
Type
Headphone Amp+Equalizer Headphone Amp+Equalizer DAC+ Headphone Amp DAC+ Headphone Amp Headphone Amp + Preamp DAC+ Headphone Amp DAC+ Headphone Amp
MAX Power Output
2400mW@32 Ohm 3.5MM: 280mW; 4.4MM: 1100mW - - 120mW@32 Ohm 128mW(SE); 510mW(BAL) 120mW(SE); 220mW(BAL)
Input
3.5mm AUX USB/OPT USB-C+OPT+COA+Microphone USB + Optical + Coaxial AUX + RCA Type C Type C+ USB A
Output
3.5mm AUX+6.35mm Headphone 3.5mm/4.4mm HP+3.5mm AUX/OPT RCA + 3.5mm Headphone RCA + 3.5mm Headphone 3.5 mm + 6.35 mm 3.5mm + 4.4mm Headphone 3.5mm + 4.4mm Headphone
Treble & Bass Control
THD
≤ 0.001% ≤ 0.001% <0.003% ≤ 0.01% ≤ 0.03% ≤ 0.0002%(SE) ≤ 0.001%(BAL) ≤ 0.0006%(SE) ≤ 0.001%(BAL)
SNR
≥ 108dB 3.5mm: 120dB; 4.4mm: 115dB >110dB ≥ 105dB ≥ 95dB ≥126dB ≥120dB
Terminating Impedance
16-300 Ohms 16-300 Ohms 16-300 Ohms 16-200 Ohms 16-300 Ohmss 16-300 Ohms 16-300 Ohms

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Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Lou

Shipped by: eMega
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$115.04
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$115.04
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  • 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.

Product Description

Fosi Audio SK01 Headphone Amplifier/Preamp

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

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
  1. Tri-Band Adjustment for Personality

    Tailor the treble, middle, and bass with the knobs to find the perfect balance.

  2. Loudness Function for More Pleasure

    Activate it to get a more balanced listening experience at lower volume levels.

  3. Two Gain Modes to Adapt Your Headphones

    Achieve the best performance by selecting the right gain level to fit different impedance.

  4. Compatible with 3.5mm/6.35mm Headphones

    Maximum 2400mW power to drive your 32-300Ω single-ended headphones with extraordinary performance.

1 Tri-Band EQ 2 Loudness 3 Gain Levels 4 Headphone Jacks
  1. As a Headphone Amp

    Drives any of your headphones easily and enrich the listening experience.

  2. As an Analog Preamp

    Modifies the characteristic to get your beloved sound.

  3. As an Equalizer

    Delivers accurate sonic detail for acoustic instruments.

1 Scenario 1 2 Scenario 2 3 Scenario 3
1 Buttons 2 Knobs 3 Side 4 Front & Rear

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.

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

Add to Cart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Customer Reviews
4.6 out of 5 stars
69
4.4 out of 5 stars
9
4.2 out of 5 stars
488
4.3 out of 5 stars
2,587
4.3 out of 5 stars
317
4.0 out of 5 stars
40
4.2 out of 5 stars
151
Price
$119.99$119.99 $159.99$159.99 $89.99$89.99 $79.99$79.99 $69.99$69.99 $99.99$99.99 $129.99$129.99
Type
Headphone Amp+Equalizer Headphone Amp+Equalizer DAC+ Headphone Amp DAC+ Headphone Amp Headphone Amp + Preamp DAC+ Headphone Amp DAC+ Headphone Amp
MAX Power Output
2400mW@32 Ohm 3.5MM: 280mW; 4.4MM: 1100mW - - 120mW@32 Ohm 128mW(SE); 510mW(BAL) 120mW(SE); 220mW(BAL)
Input
3.5mm AUX USB/OPT USB-C+OPT+COA+Microphone USB + Optical + Coaxial AUX + RCA Type C Type C+ USB A
Output
3.5mm AUX+6.35mm Headphone 3.5mm/4.4mm HP+3.5mm AUX/OPT RCA + 3.5mm Headphone RCA + 3.5mm Headphone 3.5 mm + 6.35 mm 3.5mm + 4.4mm Headphone 3.5mm + 4.4mm Headphone
Treble & Bass Control
THD
≤ 0.001% ≤ 0.001% <0.003% ≤ 0.01% ≤ 0.03% ≤ 0.0002%(SE) ≤ 0.001%(BAL) ≤ 0.0006%(SE) ≤ 0.001%(BAL)
SNR
≥ 108dB 3.5mm: 120dB; 4.4mm: 115dB >110dB ≥ 105dB ≥ 95dB ≥126dB ≥120dB
Terminating Impedance
16-300 Ohms 16-300 Ohms 16-300 Ohms 16-200 Ohms 16-300 Ohmss 16-300 Ohms 16-300 Ohms

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