Fosi Audio SK02 Desktop DAC/Amp Review

Fosi Audio's SK02 is a compact desktop DAC and headphone amplifier built around the ES9038Q2M chip, listed at $84.99 in a single Black option. The page claims decoding of 32-Bit/384kHz PCM and native DSD256, USB Type-C and optical inputs, and 3.5mm and 4.4mm outputs, and it states headphone support from 16Ω to 600Ω. It also says USB power can be taken only from the connected source device.

Specifications

Options and pricing

One option is listed, SK02-Black, at $84.99, and the page shows a crossed-out price of $99.99 next to it. It was available to order when the page was read. Both headphone outputs, 3.5mm and 4.4mm, are on the one unit, so there are no plug variants to pick, and the page does not say which cables or other items are in the box.

How it compares

At $84.99 the SK02 sits between the FiiO BTR13 Dual CS43131 Bluetooth 5.1 DAC & Headphone AMP at $69.99, a DAC and amp with Bluetooth 5.1 in its title, and the E1DA 9038D6K USB Headphone Amp 3.5mm Jack Unbalanced Output DAC+HPA at $135, whose title names a single 3.5mm unbalanced output. The SK02 lists both 3.5mm and 4.4mm outputs plus an optical input, so it suits a desk with a wired source. The TOPPING L30 Headphone Amp at $97.49 is named as an amplifier only, so it needs a separate DAC.

Shipping, returns and warranty

HiFiGO sells from hifigo.com and says every order leaves its warehouse in China, usually 1-3 business days after it is placed, and says its delivery times are estimates, not promises. Its shipping policy gives the United States 1-2 weeks (about 10 days on average) by Priority and 6-10 days by Premium, both with duties and taxes prepaid by the store; Canada 2-3 weeks; the United Kingdom 1-2 weeks; and Australia 10-15 days. Express couriers (DHL, UPS, FedEx) take 3-7 days, but then the buyer pays any duties and taxes. No shipping page names New Zealand, PO boxes are not accepted, and the free-shipping thresholds differ between the store's own pages, so check the cart. One of its two shipping pages adds that a lost parcel on an order above $50 gets only a 50% refund. A US buyer reported a $40 tariff charge in August 2025, after which HiFiGO said it had added a customs notice at checkout.

Read the return terms before you order. The homepage advertises 7-day returns. Both of HiFiGO's policy pages offer a 7-day dead-on-arrival cover (a replacement or a full refund, with the return postage refunded) and also describe 30-day returns, but a request made 7 to 30 days after delivery loses 30% of the MSRP as a restocking fee (10% more if the packaging is incomplete), plus shipping both ways and duties, and the FAQ on the same pages says there is no refund or exchange once 7 days have passed. One version recommends reselling an opened product locally. Custom IEMs and custom cables cannot be returned, no return address is published, and buyers describe sending items back to China.

HiFiGO's warranty runs one year from the order date for parts and labor; its policy names desktop DACs and amps, IEMs and dongles at one year and gives cables and adapters three months. HiFiGO decides between repair and replacement, the buyer pays the shipping, and faulty items go back for service, not for a refund. Claims go to [email protected], the only contact the store lists: its pages name no company, street address or phone, and its terms are governed by the laws of China.

On Trustpilot, HiFiGO had 4.6 out of 5 from 378 reviews when we checked on 2026-10-28 (91% five-star, 5% one-star), and it had replied to about 75% of negative reviews; Trustpilot notes the store has not invited customers to review recently. The one-star reviews mostly concern the short return window and the deductions on returns, items listed in stock that turned out back-ordered, slow email support and a tariff charge on a US delivery in 2025. HiFiGO says its products are genuine and come in the brands' retail packaging; it does not claim to be an authorized dealer.