---
product_id: 575548630
title: "– 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"
brand: "fosi audio"
price: "₱15479"
currency: PHP
in_stock: true
category: "Fosi Audio"
url: https://www.desertcart.ph/products/575548630-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange-treble-tone
store_origin: PH
region: Philippines
---

# 6-hour battery life Dual 3.5mm & 6.35mm jacks 3-band analog EQ control – 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

**Brand:** fosi audio
**Price:** ₱15479
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate Every Note — Amplify Your Audio Experience!

## Quick Answers

- **What is this?** – 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 by fosi audio
- **How much does it cost?** ₱15479 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/575548630-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange-treble-tone)

## 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

- • **Portable Powerhouse:** Class A analog amp delivering up to 2400mW with a sleek aluminum body and 6-hour battery life.
- • **Versatile Connectivity:** Seamlessly connect headphones or instruments via 3.5mm and 6.35mm jacks for ultimate flexibility.
- • **Built to Last & Impress:** Premium aluminum alloy finish with intuitive controls designed for dust resistance and durability.
- • **Smart Loudness & Tone-Defeat:** Instantly restore original sound or boost quiet moments with dedicated loudness and tone-defeat buttons.
- • **Precision Tri-Band Tone Control:** Effortlessly tailor bass, midrange, and treble for your perfect sound signature.

## Overview

The Fosi Audio SK01 is a portable Class A analog headphone amplifier and equalizer featuring tri-band tone control, loudness compensation, and dual 3.5mm/6.35mm jacks. With up to 2400mW output power, a robust aluminum alloy build, and a 6-hour rechargeable battery, it delivers customizable, high-fidelity sound for headphones and instruments alike. Perfect for audiophiles and professionals seeking versatile, on-the-go sound enhancement.

## Description

Free delivery and returns on eligible orders. Buy 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 at desertcart UK.

## 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 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CF1WL1V2 |
| Amplifier Type | Solid State |
| Best Sellers Rank | 37 in Headphone Amplifiers |
| Box Contents | Fosi Audio SK01 |
| Brand Name | Fosi Audio |
| Colour | Black |
| Compatible Devices | Musical Instruments with 6.35mm or 3.5 Jack Connectors |
| Connector Type | 6.35mm Jack & 3.5mm Jack |
| Country of Origin | China |
| Customer Reviews | 4.4 4.4 out of 5 stars (501) |
| Enclosure Material | Aluminum Alloy |
| Item Dimensions D x W x H | 12.1D x 5.1W x 4.3H centimetres |
| Manufacturer | Fosi Audio |
| Manufacturer Part Number | SK01-Fosi-EU |
| Model Name | SK01 |
| Model Number | SK01 |
| Number of Bands | 3 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Output Channel Quantity | 2 |
| Output Wattage | 2.4 Watts |
| Power Source | Battery Powered |
| Product Warranty | 24 months |
| Unit Count | 1.0 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

![– 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 - Image 1](https://m.media-amazon.com/images/I/61RW7lo9nGL.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.

## 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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**Shop now:** [https://www.desertcart.ph/products/575548630-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange-treble-tone](https://www.desertcart.ph/products/575548630-sk01-headphone-amplifier-equalizer-preamp-with-bass-midrange-treble-tone)

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-10-12*