QULOOS LPS-12i Linear Power Supply Review

The QULOOS LPS-12i is a linear power supply listed at $279, with a DC 10~15V input, a 12V output at 3A and an output ripple that the page prints as less than 0.01mV. The specification section also gives host dimensions of 180x146x41.5mm and a host weight of 650g, and says the unit is built on what it calls the proven DNA of the QP02. Its description is three pictures.

Specifications

Options and pricing

A single option is listed, named LPS-12i, at $279 and orderable when the page was read. The page text gives no in-the-box list, no input connector type and no output plug size, so what comes with the unit and which devices it can power are not stated.

How it compares

At $279 the LPS-12i costs more than the TOPPING HS02 USB2.0 Audio Isolator at $99, whose spec line reads Withstands up to 1500VDC, and more than the TOPPING PRE90+ Ext90+ RCA cable listing from $249.99. The HS02 is named as a USB audio isolator; the LPS-12i is the one here with a stated 12V, 3A output, so it suits a device that needs that supply rather than an isolation stage.

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.