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Description
DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid EarphoneFunction: For Mobile Phone Function: Monitor Headphone Function: HiFi Headphone Function: Sport Function: Common Headphone Waterproof: No Active Noise Cancellation: Yes Support Memory Card: No Connectors: 3. 5mm Line Length: 1. 2m Frequency Response Range: 5 40000Hz Control Button: No Plug Type: L Bending Vocalism Principle: Hybrid technology Sensitivity: 112dB Wireless Type: None Support APP: No Model Number: DK4001 Style: Ear Hook Resistance: 32
---SpecificationsSplit---
Accurate and Exquisite Full Frequency Performance
Hybrid system, high performance of 13mm beryllium diaphragm dynamic, with 4 high frequency/ ultra-high frequency balanced armature drivers.
Beryllium Diaphragm Dynamic Driver
The newly developed beryllium diaphragm dynamic driver, with a diameter of 13mm, brings accurate low-frequency reduction and rich medium-frequency details, allowing players to experience unprecedented extremely low-frequency response and strong acoustic performance.
Knowles Balanced Armature Driver
Four Knowles currently high-end high-frequency and ultra-high frequency balanced armature drivers achieved accurate high-frequency and ultra-high frequency reduction, greatly improve the density of audio and ultra-high frequency, and show natural and exquisite sound.
Zirconium Alloy Liquid Metal
The precision machined of liquid zirconium alloy cavity can greatly reduce the weight of the cavity, but at the same time, the strength of the cavity reaches three times of stainless steel to effectively suppress harmonic resonance, and the acoustic performance is outstanding.
Air Charging Loop System -A.C.I.S
The unique A.C.I.S in the back cavity, together with excellent performance 13mm beryllium diaphragm dynamic driver, makes the low-frequency diving and sense feeling more excellent. Creating infinite possibilities in a limited space has always been the pursuit of Dunu engineers.
FeaturePatented Self-Locking Quick Replaceable Plug
Dk-4001 headphone wire rod is designed with self-locking quick replaceable plug, which has both high appearance level and reliability. Four plugs (3.5mm single end /2.5mm balanced /4.4mm balanced / 3.5pro balanced) comprehensive consideration of the mainstream Walkman balance standard, convenient for players to adapt to a variety of players.
Patented MMCX Expansion Pin
Standard MMCX interface, as well as maintain a wide range of compatibility and improve reliability, greatly improve the service life.
Single Crystal Copper and Pure Silver Mixed Braided Cable
Dk-4001 is equipped with high-purity Furukawa Single crystal copper and pure silver braided cable, which can reduce transmission loss and ensure sound quality. The wire is wrapped with a single crystal copper shielding layer to isolate external electromagnetic interference, makes the sound background cleaner, escorts music signal transmission.
Comfortable Wearing Experience
Application lightweight materials, with ergonomically-designed shape, comfortable to wear, wear for a long time is not tired, suitable for listening for a long time.
Hand-Made Leather Case
Selected the goatskin, it is soft leather, handmade, exquisite and unique, reasonable volume, convenient storage.
Customize the SpinFit Earbuds
Dk-4001 comes with customized SpinFit eartips, optimized for multi-driver earphone design, comfortable to wear, soft sound.
Practical and Abundant Accessories
Dk-4001 packaging is equipped with a variety of practical and rich accessories, leather case, custom eartips, nameplate, Aircraft plug, cleaning tools, everything, to meet the needs of the user.
Specifications:
Model: DK4001
Driver: beryllium diaphragm dynamic driver and 4 Knowles balanced armature
Impedance: 32 Ω
The dB value: 112 dB @ 1 KHZ
Frequency response: 5Hz-40k Hz
THD: < 0.3% @ 1 KHZ
Connector: MMCX expansion pin
Cable: single crystal copper& pure silver mixed
Cable length: about 1.2m
Net weight: about 12g
Package List:
DK4001 Earphone
Plug *4
Aircraft plug
6.35 plug
Cleaning brush
SpinFit silicone eartips L/M/S*2
Gray silicone eartips L/M/S*2
T500 foam *2
Leather case
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Cute, lightweight and so roomy!
Size: Large, Color: Amourpink, Size: Large, Color: Amourpink
I am honestly so impressed with this backpack! It is the perfect mix of cute, comfy, and practical. The soft blush pink color is beautiful in person and gives it such a clean, stylish look without being flashy.
What surprised me most is how spacious it is. It holds SO much more than it looks like it would. I was able to fit all my travel essentials inside with room to spare, and the different compartments make it easy to stay organized. The side pockets are super convenient, and I love that it slides right onto my suitcase handle for traveling.
The straps are also really comfortable and padded, so even when the bag is full it still feels easy to carry. The material feels lightweight but durable, which makes it perfect for travel, work, day trips, or even everyday use.
If you want a backpack that is both functional and aesthetically pleasing, this one is definitely worth it. Cute, cozy-looking, lightweight, and surprisingly roomy!
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Amazing product!! I use it so much
Size: Large, Color: Amourpink, Size: Large, Color: Amourpink
Absolutely LOVE this back pack I use it all the time! It holds a ton of stuff and has a lot of pockets and holds a good amount of stuff. It’s great for a simple sleep over and even flights. It’s very durable and great as a personal item on flights. The strap to keep it on your roller bag is great and it also has a ton of straps to adjust it
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Spacious, organized, and perfect for travel!
Size: Large, Color: Black
This travel laptop backpack is absolutely fantastic! It's spacious and well-organized with multiple compartments for everything you need. It's airplane carry-on approved and fits perfectly in the overhead bin. The laptop compartment holds up to a 17" laptop securely with great padding. The water-resistant material keeps everything protected and the straps are comfortable for long trips. Great quality for the price. Highly recommend!
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Good bag for a good price
Size: Large, Color: Amourpink
Really loved this backpack. I got it after reading all the reviews and wanting something for travel. The inside pockets with extra compartments that are water proof or organizing was a really nice touch. I traveled on airlines with this a few times and then started using it for school as well. It help up really well. I tend to be kind of rough on things and unfortunately the zipper broke. I'm unsure of if I over stuffed it or it was just a cheaper zipper. I would have considered resorting it because I used and loved it so much but my mom's dog got to it and it was not salvageable after that. I would recommend this specifically as a great travel backpack for the air port but it can easily double as an over night bag or school back pack.
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Reviewed in the United States on April 13, 2026
★★★★★ 5
So big, but lightweight!
Size: Large, Color: Amourpink
I bought this backpack to have as my "personal item" on the many flights I have to take. It is the perfect weight, having a place for just about anything you'd want to have during a flight, as well as having your carry-on items. The charging port is a bit of a challenge to plug in because of how you have to position the cord, but it is doable. I did not end up using the charging feature on my most recent flight, but I can see how it would be helpful for the travel that does not provide many charging stations. I have some serious back issues, but even full, I found this backpack to be a reasonable weight. I cannot attest to it's durability at this time, as I've only taken it on two trips now, but it is a great bag. There are many compartments, which can be good and bad. I recently put my wallet with all my identification and cards in a compartment that was easily missed. I thought I had lost my wallet and was panicked about how I'd get on my return flight if I didn't find it. After completely emptying the bag in my friend's car, and running my hands all over the compartments, I found the wallet. Here's the thing, my wallet is not little, so you can see that the walls of this backpack are pretty thick. The pink color is more of a dusty pink, which I find to be more attractive than a bright pink for something like this.
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Reviewed in the United States on May 22, 2026