---
product_id: 575002662
title: "Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp for Electric Guitar Instrument with 3.5/6.35mm Jacks"
brand: "fosi audio"
price: "812.19 DT"
currency: TND
in_stock: true
reviews_count: 6
category: "Fosi Audio"
url: https://www.desertcart.tn/products/575002662-fosi-audio-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange
store_origin: TN
region: Tunisia
---

# 2400mW max power output 6-hour battery life 3-band tone control Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp for Electric Guitar Instrument with 3.5/6.35mm Jacks

**Brand:** fosi audio
**Price:** 812.19 DT
**Availability:** ✅ In Stock

## Summary

> 🎸 Elevate your sound game anywhere, anytime — because your ears deserve the best!

## Quick Answers

- **What is this?** Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp for Electric Guitar Instrument with 3.5/6.35mm Jacks by fosi audio
- **How much does it cost?** 812.19 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/575002662-fosi-audio-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rugged Elegance:** Sleek aluminum alloy chassis built for durability and premium desktop style.
- • **Portable Powerhouse:** Up to 6 hours of uninterrupted, high-fidelity listening on the go.
- • **Loudness & Pure Mode:** Enhance low-volume clarity or instantly reset to pure, uncolored audio.
- • **Precision Tri-Band EQ:** Customize bass, midrange & treble for your perfect sound signature.
- • **Versatile Connectivity:** Seamlessly switch between 3.5mm & 6.35mm jacks for instruments & headphones.

## Overview

The Fosi Audio SK01 is a portable Class A analog headphone amplifier and preamp designed for electric guitars and high-impedance headphones. Featuring tri-band tone control, loudness compensation, and a pure tone-defeating button, it delivers up to 2400mW power through 3.5mm and 6.35mm jacks. Its robust aluminum alloy body houses a 2500mAh battery offering 6 hours of playback, making it a versatile, high-quality audio enhancer for both desktop and on-the-go use.

## Description

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 Tri-Band Adjustment for Personality Tailor the treble, middle, and bass with the knobs to find the perfect balance. Loudness Function for More Pleasure Activate it to get a more balanced listening experience at lower volume levels. Two Gain Modes to Adapt Your Headphones Achieve the best performance by selecting the right gain level to fit different impedance. Compatible with 3.5mm/6.35mm Headphones Maximum 2400mW power to drive your 32-300Ω single-ended headphones with extraordinary performance. As a Headphone Amp Drives any of your headphones easily and enrich the listening experience. As an Analog Preamp Modifies the characteristic to get your beloved sound. As an Equalizer Delivers accurate sonic detail for acoustic instruments. 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.

Review: The usb for power only not pc connect, you need to get 3.5mm jack - Small easy to carry and it have its own battry if you plan to take it out for a while, at home it made my time with the higher sound and bass tweaking.
Review: Does exactly what you'd expect, and does it well - I bought this to add life and depth to a portable cd player that works great but sounds a little flat, and struggles to drive higher-impedance headphones. This works perfectly, adds a lot more power/volume and the tone controls give a good range of eq. The "loudness" button is also very useful at low volume, the sound quality of my cd player is greatly improved with this little device. Couldn't be happier with it. Also does the same for phone/tablet. Build quality is excellent, feels very solid and durable. Small enough to put in your pocket, if a little heavy.

## Features

- 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 most suitable 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CF1WL1V2 |
| Amplifier Type | Solid State |
| Best Sellers Rank | #29,741 in Electronics ( See Top 100 in Electronics ) #43 in Headphone Amps |
| Brand | Fosi Audio |
| Built-In Media | Fosi Audio SK01 |
| Color | Black |
| Colour | Black |
| Compatible Devices | Musical Instruments with 6.35mm or 3.5 Jack Connectors |
| Compatible devices | Musical Instruments with 6.35mm or 3.5 Jack Connectors |
| Connector Type | 3.5mm Jack, 6.35mm Jack |
| Customer Reviews | 4.4 out of 5 stars 485 Reviews |
| Enclosure Material | Aluminum Alloy |
| Item Dimensions D x W x H | 12.1D x 5.1W x 4.3H centimeters |
| Manufacturer | Fosi Audio |
| Material | Aluminum Alloy |
| Mfr Part Number | SK01-Fosi-EU |
| Model Name | SK01 |
| Model Number | SK01 |
| Number of Bands | 3 |
| Output Channel Quantity | 2 |
| Output Wattage | 2.4 Watts |
| Output wattage | 2.4 Watts |
| Power Source | Battery Powered |
| Product dimensions | 12.1D x 5.1W x 4.3H centimeters |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Fosi Audio
- **Colour:** Black
- **Compatible devices:** Musical Instruments with 6.35mm or 3.5 Jack Connectors
- **Material:** Aluminum Alloy
- **Output wattage:** 2.4 Watts

## Images

![Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp for Electric Guitar Instrument with 3.5/6.35mm Jacks - Image 1](https://m.media-amazon.com/images/I/61wN4KgfuPL.jpg)

## Questions & Answers

**Q: Can it be used while charging?**
A: You can use the SK01 while it is plugged in and charging, and connect the source via AUX IN. Or use a 5V 1.5A/2A adapter to charge it fully and unplug it when in use

**Q: If both its line out and headphone jack are connected to the headphones and amplifier, which output takes priority?**
A: The design allows both the line output and headphone output to play the same audio simultaneously. To exclusively use the headphones, it's necessary to disconnect the line out

**Q: The tone-control knobs are not working?**
A: Please check if the TONE button is set to PURE mode. PURE is the mode where the signal bypasses the tone circuit. Switching to TONE mode should enable the tone adjustment.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The usb for power only not pc connect, you need to get 3.5mm jack
*by M***I on 31 May 2025*

Small easy to carry and it have its own battry if you plan to take it out for a while, at home it made my time with the higher sound and bass tweaking.

### ⭐⭐⭐⭐⭐ Does exactly what you'd expect, and does it well
*by A***E on 26 December 2025*

I bought this to add life and depth to a portable cd player that works great but sounds a little flat, and struggles to drive higher-impedance headphones. This works perfectly, adds a lot more power/volume and the tone controls give a good range of eq. The "loudness" button is also very useful at low volume, the sound quality of my cd player is greatly improved with this little device. Couldn't be happier with it. Also does the same for phone/tablet. Build quality is excellent, feels very solid and durable. Small enough to put in your pocket, if a little heavy.

### ⭐⭐⭐⭐⭐ Perfect Match for My Setup – Powerful and Clean
*by M***W on 1 March 2026*

I’m using the Fosi Audio SK01 together with the Fosi Audio DS2 and my Beyerdynamic DT 770 Pro 80 Ohm, and the combination sounds fantastic. The SK01 has more than enough power to drive my 80 ohm headphones with ease. The sound is clean, dynamic, and detailed. Bass has great punch and control, guitars sound clear and energetic, and vocals are natural without being recessed. It really brings my music to life. The tone controls are a big advantage. I can slightly boost the bass when I want more energy, or adjust the treble for extra clarity depending on the recording. It’s simple but very effective. Build quality is solid, the knobs feel smooth, and it looks great on the desk. For the price, the performance is impressive. If you’re building a budget-friendly but high-quality wired headphone setup, the Fosi Audio SK01 is absolutely worth it.

## Frequently Bought Together

- Fosi Audio SK01 Headphone Amplifier Equalizer Preamp with Bass Midrange Treble Tone Control and Loudness Compensation Portable Class A Analog Amp for Electric Guitar Instrument with 3.5mm 6.35mm Jacks
- Syncwire 3.5mm Nylon Braided Aux Cable (3.3ft/1m,Hi-Fi Sound), Audio Auxiliary Input Adapter Male to Male Cord for Headphones, Car, Home Stereos, Speaker, iPhone, iPad, iPod, Echo & More – Black
- Nanxudyj AUX Cord 6ft/1.8M,3.5mm Stereo Audio Cable 90 Degree 3.5mm Male to Male Stereo Aux Cable Right Angle TRS Cable Compatible for car, Headphone,Tablets, Speakers

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-12*