Can it be used while charging?

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

If both its line out and headphone jack are connected to the headphones and amplifier, which output takes priority?

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

The tone-control knobs are not working?

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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

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

Product ID: 575548630

Details

Brand
Fosi Audio
Colour
Black
Compatible devices
Musical with
Material
Aluminum Alloy
Output wattage
2.4 Watts

🔋6-hour battery life

🔌Dual 3.5mm & 6.35mm jacks

🎚️3-band analog EQ control

$373.82

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ecuador.

Secure transaction

Description

🎧 Elevate Every Note — Amplify Your Audio Experience!

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.

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.

Specifications

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

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$373.82

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ecuador.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

View all Trustpilot reviews