HAKUGEI Sound of Thunder Earphone Cable Review
A HAKUGEI earphone cable at $60 in six options: 2.5mm, 3.5mm or 4.4mm with 0.78 2Pin or MMCX ends. Its pictures print litz silver plated 6N occ in centre and out layer with litz 6N OCC copper, 20 awg, 688cores in total, and a 1.25 meters length.
Our verdict
Suits buyers who want a litz silver plated 6N OCC and litz 6N OCC copper cable in one fixed plug and connector pairing at $60, and who accept specifications read from pictures. A text specification list, an in-the-box list or the Type-C and Lightning plugs the pictures mention are not part of the options, so buyers who need them should look elsewhere. The main caveat is that the pictures list more ends than the six options offer.
- Best for
- Buyers who want a 2.5mm, 3.5mm or 4.4mm plug with 0.78 2Pin or MMCX ends at one $60 price.
- Skip if
- You need Type-C or Lightning plugs, or an in-the-box list.
Why 3.3/5: Held back by a page with no description text whose figures sit in pictures read only in part, by the store's own terms contradicting each other, and by no independent test of this cable checked for this review.
Sound of Thunder is a HAKUGEI cable that its title calls Litzs 6N OCC Copper Mixed Silver, sold at $60 in 2Pin 0.78 or MMCX versions with 2.5mm, 3.5mm or 4.4mm plugs. Its pictures give a 1.25 meters length, a PVC RoHS jacket and 20 awg wire in a 4 cable braid with 688cores in total. The page has no description text, and the pictures list more plugs and ear connectors than the six options offer.
Specifications
| Spec | Page says (text and pictures) |
|---|---|
| Name | Sound of thunder |
| Material | litz silver plated 6N occ in centre and out layer with litz 6N OCC copper |
| Cable structure | 4 cable braided and single cable 20 awg 172cores total: 688cores |
| Jacket | PVC RoHS |
| Cable length | 1.25meters |
| Plug (as printed) | Non-megnitic gold plate copper alloy 3.5/2.5/4.4 DAC type-c/lightning c100 |
| Ear connectors (as printed) | 0.78 2pin, mmcx ie300 ie600 ie900, QDC, A2DC/Pentaconn Acoustune, 2 pcs 3.5 hifiman, 2 pcs 2.5, AKG etc. |
| Plug options | 2.5mm, 3.5mm, 4.4mm |
| Ear connector options | 2Pin 0.78 or MMCX |
Options and pricing
Six options are listed, all $60 and orderable when read: 2.5mm-2Pin 0.78, 3.5mm-2Pin 0.78, 4.4mm-2Pin 0.78, 2.5mm MMCX, 3.5mm MMCX and 4.4mm MMCX. The option group is named Color, but the names carry only a plug and a connector. The pictures also list Type-C and Lightning plugs and QDC, A2DC and Pentaconn Acoustune ear connectors, and do not say which come with this listing or how a buyer picks. The pictures read print no in-the-box list, and the photos among them show only the cable.
How it compares
The HAKUGEI Gentleman Litz 7N OCC Copper With Cotton Fibre Filled Shield 5-in-1 Switchable Plug Earphone Cable starts at $58 and its title names a 5-in-1 switchable plug, while each Sound of Thunder option is $60 with one plug size named. The OE Audio 2DualOFC High-Fidelity Earphone Cable is $57.99, and its spec line gives 1.2m/4ft where this cable's pictures give 1.25 meters. This one suits buyers who want a single plug at one price; the Gentleman suits those who want a plug set.
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.
Cables and adapters get three months of warranty from the order date, against one year for DACs, amps and IEMs; a note on the same page also excludes cables from returns for hygiene reasons, while the FAQ says a cable can come back in its original condition. HiFiGO decides between repair and replacement and the buyer pays the shipping. Claims go to [email protected], the only contact the store lists: its pages name no company, street address or phone.
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.
What we liked
- All six options are $60 and were orderable when the page was read
- 2.5mm, 3.5mm and 4.4mm plugs with 0.78 2Pin or MMCX ends are named in the options
- Pictures give 1.25 meters, single cable 20 awg with 172cores, and 688cores in total
- A PVC RoHS jacket and a litz silver plated 6N OCC centre are named in the pictures
Worth noting
- The pictures list Type-C, Lightning, QDC, A2DC and other ends that the six options do not offer, and do not say how a buyer picks
- The pictures read print no in-the-box list; the photos among them show only the cable
- Five of the pictures were not opened, and the cable's name varies between pictures
Questions before you buy
Which plugs and connectors can I choose?
The six options pair a 2.5mm, 3.5mm or 4.4mm plug with 2Pin 0.78 or MMCX, all at $60. The pictures also list type-c and lightning plugs and more ear connectors, without saying which come with this listing.
What conductor do the pictures give?
A pictured parameter line gives litz silver plated 6N occ in centre and out layer with litz 6N OCC copper, with 4 cable braided and single cable 20 awg 172cores, total 688cores, and a PVC RoHS jacket.
What cable length do the pictures give?
The pictures give a cable length of 1.25 meters.
Where does HiFiGO ship from, and how long does it take?
From its warehouse in China, usually 1-3 business days after the order. The shipping policy gives 1-2 weeks to the US by Priority (6-10 days by Premium), both with duties and taxes prepaid, 2-3 weeks to Canada, 1-2 weeks to the UK and 10-15 days to Australia. Express couriers take 3-7 days, but the buyer pays any duties.
Can I send it back if I change my mind?
HiFiGO gives 7 days to report an item that arrives dead, damaged or wrong. Its policy also describes 30-day returns, but requests 7 to 30 days after delivery lose 30% of the MSRP plus shipping both ways and duties, and the FAQ on the same page says no refund or exchange after 7 days. Ask [email protected] before you open the box.
What warranty does HiFiGO give on cables?
Three months from the order date for cables and adapters, against one year for DACs, amps and IEMs. HiFiGO chooses repair or replacement and the buyer pays the shipping. Claims go to [email protected].
Sources & verification
What this review is based on and the day we last read it. Specs and claims from the maker are the maker’s own; the verdict and the rating are ours.
From the store
- HiFiGO product page for this item: specs, options and price (the buy buttons go there)Specs, options and the listed priceRead October 28, 2026
- HiFiGO shipping policyShips from China in 1-3 business days; US 1-2 weeks by Priority or 6-10 days by Premium, duties prepaid; Express buyers pay dutiesRead October 28, 2026
- HiFiGO shipping and order tracking pageA second shipping text: Premium also for Canada and Australia, Canada free shipping from $99.99, lost-parcel rulesRead October 28, 2026
- HiFiGO refund policy7-day dead-on-arrival cover; 30-day returns minus a 30% restocking fee; its FAQ says no refund after 7 daysRead October 28, 2026
- HiFiGO warranty and refund policyWarranty by product class (1 year; cables and adapters 3 months); 30% fee for resealing an opened productRead October 28, 2026
- HiFiGO terms of serviceOperator named only as HiFiGo; governed by the laws of China; contact [email protected]Read October 28, 2026
Independent
- HiFiGO reviews on Trustpilot4.6 of 5 from 378 reviews (91% five-star, 5% one-star); the store has not invited reviews recentlyRead October 28, 2026
What we couldn’t verify
- The pictures list plugs (type-c, lightning c100) and ear connectors (QDC, A2DC, Pentaconn Acoustune, mmcx ie300 ie600 ie900, 2 pcs 3.5 hifiman, 2 pcs 2.5, AKG) beyond the six options, and do not say which come with this listing.
- Sound claims in a picture (strong voice and low frequency, bright treble detail from the silver-plated centre) are wording only; a last pictured line is read as accepting custom orders, a service claim not assessed here.
- Five of the pictures were not opened; one picture calls the cable The Voice of Thunder and another Sound of thunder.
- HiFiGO's policy pages contradict each other: 30-day returns with a 30% restocking fee in one place, no refund or exchange after 7 days in the FAQ.
- HiFiGO's pages name no company, street address or phone number; the only contact given is [email protected].
- HiFiGO's warranty page excludes cables from returns for hygiene reasons, while its FAQ says a cable can come back in its original condition.
Spotted an error or something out of date? Tell us and we’ll fix it and update the date.
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