GUSTARD U26 USB Digital Interface Review

The GUSTARD U26 is listed by HiFiGO as a USB digital interface at $999.99, in silver or black. Its page has no description text, only 19 pictures, and those show a USB Type-B input, a 10MHz BNC clock input, and optical, coaxial, AES and two IIS-over-HDMI outputs on the rear panel. A pictured table gives the IIS output PCM at 44.1kHz-1563kHz, 16Bit-32Bit and DSD64-DSD2048, while other pictures give 1536kHz as the top rate.

Specifications

Options and pricing

The page lists two colors at one price: U26-Silver and U26-Black, each $999.99 and orderable when the page was read. The pictures name USB, clock, optical, coaxial, AES and IIS connections, but no contents list was among the lines read for this review, so what the price includes beyond the unit is not known here. A rear-panel callout names a voltage selector, and a picture gives AC 115 V / 230 V, 50/60 Hz.

How it compares

The DAART Yulong DP1 Network / USB Digital Interface costs $939 against $999.99 here, and its name adds Network to USB; the U26's rear-panel callouts list a USB input and a clock input but no network port. The TOPPING D90 III Discrete Fully Balanced HiFi DAC is $999 and is named a DAC, so it suits buyers who want the conversion in the same box; the U26 suits owners of a DAC with an IIS, AES, coaxial or optical input.

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.