UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone-ArkarTech
UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone-ArkarTech
UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone-ArkarTech
UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone-ArkarTech
UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone

UiiSii BA-T9 Hi-Res Tripple Drivers In-Ear Headphone

Regular price $299.99 Sale price $119.99

2BA + DD Hybrid Drive Technology, Great Accuracy Parse

Dual chamber single membrane moving coil and two moving iron unit mixed three-unit design
Let the low frequency of the headphones be deep, the mid-range sound is solid, and the high-frequency details are more abundant.
UiiSii BA-T9 Hi-Res headset

Vibrant and brilliant 

The BA-T9's outward appearance is inspired by the aircraft's turbines and is both brilliant and vibrant. Through the transparent PC shiny surface, the tough metal film is clearly visible, and complements the metal CD pattern on the side, shining the music. 

Details resolution like a common thread

The moving coil and two balanced armature are mixed to form a 3-way headset. The moving coil is responsible for bass, while the balanced armature is responsible for driving at high or above frequency.

They both work in coordination, rendering deep and rich bass, tough middle range and abundant high frequency. With strong resolving power, KNOWLES ’compound dual balanced armature unit (TWFK) renders rich and delicate sound, allowing users to enjoy the full and rich sound experience. In order to better play the sound quality of the headset, upon exploration and study for a long time, we add a passive crossover to the back cavity, improving and stabilizing the overall sound quality of the headset.

Angled in-ear design, born for comfort

Angled in-ear design comfortably fits the ear canal while minimizing external sound interference, so that you can be more fully immersed in the music world.
MMCX Detachable Upgraded Silver-plated cable provides the wonderful sound experience
With silver-plated single-crystal copper cable which is durable and not reliable and has lower resistance than that of ordinary wire rods, the headset provides users with the good user experience.
  • Sensitivity: 112±3dB
  • Function: For Mobile Phone,Monitor Headphone,HiFi Headphone,Sport
  • Waterproof: No
  • Active Noise-Cancellation: Yes
  • Support Memory Card: No
  • Connectors: 3.5mm
  • Line Length: 1.2m
  • Plug Type: Line Type
  • Vocalism Principle: Hybrid technology
  • Wireless Type: None
  • Support APP: No
  • Model Number: UiiSii BA-T9
  • With Microphone: Yes
  • Resistance: 32Ω
  • Support Apt-x: No
  • Style: In-Ear
  • Brand Name: UiiSii
  • Volume Control: Yes
  • Communication: Wired
  • Is wireless: No
  • Control Button: Yes
  • Frequency Response Range: 10-40000HZ


All orders could be shipped to anywhere of the world. Orders are shipped on business days only (Monday-Friday, excluding Festivals).

There are two kinds of shipping method for different weight of package.

①Standard Shipping:

Free shipping for Standard Shipping (with products under 20kg) for 10-18 days.

②Fast Shipping:

US$9.99 for Fast Shipping (with products under 25kg) for 3-7 days.

ArkarTech guarantees safe delivery of your orders. We exchange all damaged items. ArkarTech reimburses return shipping charges. Contact us for a RMA, within 5 days of delivery, and ship products back via the least expensive method.

If your country imposes high import taxes, please choose standard free shipping. Packages shipped via expedited service (Speedpost Global Express) are more likely to be opened and examined by your country's customs.


For in-stock items, depending on the shipping method you select, your order should be processed and shipped within 5-7 working days after order verification and credit approval. Orders will be processed and shipped once credit card authorization is received. Note that during festive periods, please allow more time for delivery. We do apologize for the inconvenience caused.


During 30 days following the delivery of your order, you may request the exchange or refund of items, which you must return to us in perfect condition accompanied by the original invoice. Returns will only be accepted if labels and original packaging are fully intact. Arkartech.com cannot accept returns where labels have been removed.

Furthermore, and due to health and hygiene reasons, you have no right to return in-ear products if such product’s packaging has been opened, meaning that the packaging seals are broken.

You are responsible for the shipping of returned items back to Arkartech.com. Items lost in transportation will not be compensated for.

Shipping charges on returned merchandise are at the customer’s expense. However, Arkartech.com will not charge additional shipping on exchanges. Refunds for returned merchandise will be made within two weeks of the return of the product, to the original purchaser’s credit card. Note that additional duties and/or taxes will not be refunded. Neither will shipping costs. All exchanges are subject to availability.

Faulty items will be exchanged to the same type of product in the same size, subject to availability. Refunds for faulty items can be made within the 30-day period following delivery.

For exchanges and returns send an email to service@arkartech.net.

Customer Reviews

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I recommend this product

Even more beautiful than described

AliExpress Shopper
I recommend this product

Sound effect: Sound quality: good appearance, good material, good wearing feeling: wearing the size of the endurance ability: long duration, can listen to four or five hours of other features: Bluetooth headset quality is very good, consistent with the seller's description, delivery speed is very fast, packaging is very careful, rigorous, logistics company service attitude is very good, transport speed is very fast.

AliExpress Shopper
I recommend this product

Take it home and turn it on for a few months now. Now it's the real three-frequency balance of sound, high detail, strong analytical power. It's a little overheated when it's not cooked at the beginning. Now the low frequency rebound is playing just right and fast.

AliExpress Shopper
I recommend this product

So cool HIFI headphones really like it, it's very powerful, the design is cool, the sound quality is cool, suitable for enthusiasts, likes, recommends sellers, recommends products.

I recommend this product

Cool headphones, human voice transmission and really good.