Fosi Audio SK01 Desktop Portable Headphone Amp & Preamp (Standard Version) with 3.5mm & 6.35mm Jacks

Fosi Audio SK01 Desktop Portable Headphone Amp & Preamp (Standard Version) with 3.5mm & 6.35mm Jacks

Features:
SK01 Multi-Function Headphone Amplifier & Preamplifier
* Personalized control at your fingertips
* High Signal-to-Noise Ratio: ≥ 108dB
* Low Distortion: ≤ 0.001%
* Headphone Impedance: 16-300Ω

Precision Craftsmanship, Thoughtfully Designed
* Made from a single block of CNC-machined aluminum alloy, finished with refined sandblasting and anodizing processes, the SK01 is a true work of art.
* It offers bass, mid, and treble tone controls, as well as high/low gain settings—tailoring the sound to your preferences and adapting to various headphone types.
* With powerful output and an integrated preamp and headphone amp design, the SK01 brings more excitement to your musical life.

Treble, Mid, and Bass Adjustment
* Featuring three-band tone control with center-detent positioning technology, it allows you to effortlessly find the perfect balance.
* It is equipped with a PURE bypass button for one-click restoration of the original sound.

Compatible with Both High and Low Impedance Headphones
* Whether you're using high-impedance, low-sensitivity headphones or low-impedance, high-sensitivity ones, SK01 ensures optimal performance.
* High gain provides strong driving power for high-impedance headphones, while low gain protects sensitive headphones and maintains audio purity.

3.5mm and 6.35mm Headphone Jacks
* Compatible with both 3.5mm and 6.35mm single-ended headphones (32-300Ω).
* The high-power output design lets you feel the true force of music—whether it's powerful rock or emotional symphonies, SK01 delivers exceptional performance with ease.

Loudness Bass & Treble Compensation
* When night falls and the world quiets down, SK01's Loudness function gently enhances the lows and highs, like a soft lullaby that brings deep relaxation to your soul.

6-Hour Long Battery Life
* It is equipped with a high-capacity 2500mAh battery and an isolated power design that eliminates interference—ensuring a clean and uninterrupted listening experience even while charging.

CNC All-Aluminum Body
* The all-metal chassis feels as exquisite as it looks—adding a touch of elegance to any desktop setup.

Application Scenarios:
As a Headphone Amplifier
* It enriches your listening experience
* Boosts low frequencies for more powerful and impactful music
* Enhances mid-range for clearer, more prominent vocals
* Accentuates high frequencies to bring out brightness and detail

As a Preamp
* It provides initial amplification and tone refinement
* Amplifies low-level audio signals so your power amp can drive them more effectively
* Improves sound quality and volume
* Offers bass, mid, and treble adjustments to meet personal listening preferences

As an EQ Equalizer
* It enables precise tone control
* Boosts mid and low frequencies for fuller, more powerful sound
* Reduces high frequencies to minimize harshness
* Helps shape a better overall sound through frequency adjustment

Specifications:
Input and Output:
* Audio Input Port: 3.5mm Input
* Power Input Port: 5V Type-C Input
* Headphone Audio Output Ports: 3.5mm Headphone Output and 6.35mm Headphone Output
* Additional Audio Output Port: 3.5mm Line Out Output

Electrical Specifications:
* Power: High Gain: RMS 2400mW at 32Ω; Low Gain: RMS 300mW at 32Ω
* Signal-to-Noise Ratio: 108dB
* Distortion: ≤0.001% at 1kHz and 770mV
* Noise Floor: 20µV
* Crosstalk: 83dB
* Frequency Response: 20Hz-20kHz (±0.05dB)
* Headphone Impedance: 16-300Ω
* Battery Capacity: 2500mAh
* Input Voltage: DC 5V

Packing List:
* 1 × SK01
* 1 × User Manual
* 1 × 2-in-1 USB-A/C to USB-C Cable
    
Packaging Details:
* Weight: 0.5kg