Oriolus Forsteni Hybrid IEMs Review

Listed from $399 in two editions, the Oriolus Forsteni is a three-driver hybrid with two balanced armatures and a 10mm dynamic driver, per the page. The page names a Knowles 30017 balanced armature driver, credits Raosound Studio with the tuning and gives 24Ω and 111dB / mW. The cable is described as detachable, with a 0.78mm two-pin interface and a 3.5mm plug.

Specifications

Options and pricing

Two editions are listed: the Logo edition at $399 and the Carbon fiber edition at $439, both orderable when the page was read, with the option field labeled color. The page text gives no description of how the two differ beyond their names. The page's package list names the earphone, 4 pairs of silicone eartips (S/M/L), 2 pairs of foam eartips, a leather case and a clip, and the page gives the plug diameter as 3.5mm.

How it compares

The Fidue Thunder 1DD + 2BA Hybrid Drivers In-Ear Earphone is $399 with a 15mm dynamic driver and the same 1DD + 2BA combination, against $399 and $439 here. The QoA Mojito 2 is $399 with six balanced armature drivers on each side. The TANCHJIM x Effect Audio Force 2DD IEMs cost $369.60 and list dual dynamic drivers of 10mm and 8.2mm. The Forsteni suits buyers who want a 2BA + 1DD layout with a choice of two editions; the Mojito 2 suits those who want six armatures per side.

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.