SIVGA Nightingale Pro Planar IEMs Review

SIVGA's Nightingale Pro uses a proprietary 14.5mm planar magnetic driver with a multi-magnetic structure and is listed at $296. The page gives 16Ω±15%, 107dB±3dB, 20Hz~40kHz and 14 Grams. The cable ends in a 4.4mm balanced plug and connects with 0.78mm 2-pin connectors, and the shells are aluminium-magnesium alloy with zebrawood face plates.

Specifications

Options and pricing

Only one option, Nightingale Pro, is listed, at $296, and it was orderable when the page was read. The page names a 4.4mm balanced termination plug, and the page text gives no single-ended plug or other plug option. The cable is an 8-strand 26 AWG Litz braid of single-crystal copper and silver-plated single-crystal copper conductors, with 0.78mm 2-pin connectors.

How it compares

The BQEYZ Winter Ultra costs $269 and pairs a 12mm dual-cavity dynamic driver with a bone-conduction driver, while the JUZEAR Harrier at $324.99 lists 1DD+6BA+2 micro planar drivers and the NiceHCK Himalaya at $329 uses a 10mm dual-magnetic dual-layer CNT dynamic driver. The Nightingale Pro, at $296, is a single planar driver design; it suits buyers who want that and have a 4.4mm output, while the others suit those who want a hybrid, bone-conduction or dynamic layout.

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.