Five-Unit Flagship 2BA+1DD+2EST Hybrid IN- Ear Earphones

  • Upgraded Configuration
  • Advanced Electrostatic Units
  • Electrostatic Speaker Driver
  • Enhanced Low-Frequency Dynamics
  • Optimized Mid and High Frequencies
  • Customizable Sound
  • Lightweight and Acoustically Enhanced Design
  • High-Quality Copper Cable
Product Price
Terms & conditions

Free standard shipping to most countries

Free express shipping on orders over $270*. Enjoy free tax and duty paid to most countries. Please refer to our shipping FAQ to see if you apply.

Covid-19 Shipping Delay Notice

Shipping may be delayed due to covid-19 depending on your country regulations.
Free Shipping

Authenthic Products

Linsoul Audio is the authorized distributor. All products are authentic and genuine.

Free Shipping

Worldwide Free Shipping

We are located in China but send our products worldwide for free. T&Cs apply.


1 Year Warranty

We provide 1 year warranty for the all products except the cables*.

Upgraded Configuration

In the pursuit of a transcendent musical journey, BAX Pro has embarked on a path of innovation, elevating its tunable dynamic and electrostatic hybrid in-ear earphones. BAX Pro now features an upgraded configuration that incorporates advanced electrostatic, dynamic, and balanced armature units, complemented by a customizable design. This enhanced setup has resulted in several notable improvements.

Advanced Electrostatic Units

The enhanced high-frequency unit now boasts dual Knowles balanced armature units, providing superior sound clarity, an expanded dynamic range, and an overall enhancement in earphone audio quality. These design improvements enrich the sound spectrum and optimize the earphone's efficiency, delivering a profoundly improved listening experience.

Electrostatic Speaker Driver

The use of imported electrostatic units has extended the frequency response range and elevated sound quality to new heights. With two electrostatic units, BAX Pro precisely captures and faithfully reproduces high-frequency signals, resulting in a more transparent and refined auditory experience. Notably, the high-frequency performance stands out, delivering pure sound quality that unlocks an entirely new realm of auditory sensations.

Enhanced Low-Frequency Dynamics

BAX Pro is not just about high frequencies; it also incorporates a fourth-generation dual-magnetic low-frequency dynamic unit. This 10mm dual-magnetic large dynamic unit excels in terms of frequency response and dynamic range. It delivers clear and robust bass with a rich atmospheric quality, thanks to the beryllium diaphragm that offers exceptional rigidity and response speed. This enhancement provides greater detail and musicality to your listening experience.

Optimized Mid and High Frequencies

In the mid to high-frequency spectrum, BAX Pro introduces the new Knowles 33518 dynamic driver dedicated to high frequencies. This addition enhances high-frequency clarity, infusing the overall sound quality with a lifelike and captivating brightness. Coupled with the 29689 mid-frequency dynamic driver, it extends mid-frequency details and layering, ensuring BAX Pro delivers an incredible musical performance.

Customizable Sound

With the incorporation of state-of-the-art electronic three-way technology and a three-stage tuning switch, BAX Pro offers six adjustable tuning styles. These styles can be seamlessly customized to cater to a wide range of listening preferences, ensuring there's always a mode that perfectly suits your personal taste.

Lightweight and Acoustically Enhanced Design

BAX Pro now incorporates lightweight materials, reducing the earphones' overall weight by 35% without compromising quality. Crafted from an aluminum-magnesium alloy, known for its remarkable strength and corrosion resistance, the earphones feature an intricately designed sound chamber that enhances the precision and clarity of audio waves. The professionally designed cavity results in a richer, more realistic, and expansive musical environment. The semi-open face cover design alleviates pressure, guaranteeing a relaxing and enjoyable listening experience.

High-Quality Copper Cable

As a standard feature, BAX Pro includes an eight-strand single crystal copper detachable cable. This cable comprises eight independent strands of single crystal copper, which enables efficient signal transmission with increased capacity and stability. Experience smooth and delicate high-frequency transmission with high resolution, clear details, and strong layering. The mid-frequency range offers textured, well-balanced tones with magnetic sound quality, while the low-frequency response is deep and elastic. You also have the flexibility to choose from 3.5mm, 2.4mm, or 4.4mm audio connectors for convenient cable replacement.

Jack type
Ear hook
Earphone topography
Frequency response
7Hz-40000 Hz
Connector type
Cable length
  • 1x TRN BAX pro
  • Eight-strand single crystal copper cable
  • Aluminum storage case
  • 3.5/2.5/4.4mm connectors
  • 8 pair of ear tops balanced*3(SML)+ T-set*3(SML) + foam tips*2(M)

Coming soon...

Our Shipping Process

If everything goes right our system will automatically generate your order and send you a confirmation email. If you don't receive the confirmation email please double-check that it wasn't automatically stored in your spam or promotions folder.

3 Working Days*

Most of the items you see are in stock and ready to be shipped after 3 working days. If you plan to order a custom (Design or Fit) product, a pre-order, or a made to order item processing times may change on item to item basis.

Standard Shipping
15 to 30 Days.

Standard shipping is offered free worldwide for orders under $269 USD (with some exceptions), but please consider that delivery times may vary considerably depending on your country, up to 90 Days.

Express Shipping
3-6 Working Days.

Most items over $270 include free express shipping (DHL or similar). If your order total is under $270 you can manually add Express Shipping at the checkout page for $15.00 - $35.00USD

World-Wide Shipping

Shipping FAQ

Which countries do you ship to?

We are generally able to ship to most countries via Express Shipping, and many countries via Standard Shipping. You may clarify this with our team to check whether Standard Shipping is available to your country.

We cannot ship to addresses that are "PO boxes or APO/FPO".

*Note: Generally, we can only do Selected Shipping to India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.
This may be subjected to changes due to unpredictable issues such as Covid, war, and etc.

How much does shipping cost?

We have two shipping methods - Standard Shipping and Express Shipping.

Standard Shipping is free for most countries, while Express Shipping is 15-35USD depending on your country. If your order is over 270USD, Express Shipping is free*. 

*This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded.

Shipping fees exclude import taxes or processing fees that may be applicable for your country. Linsoul is not responsible for such fees. Should you refuse to pay the tax/customs fees, shipping fees will still be deducted from the amount paid for the two-way freight charges. The cost of the freight charges may be more than the amount reflected on your order due to tax and other miscellaneous fees.

Some parcels claimed to be “returned to the seller” may be destroyed by the post office or customs officers when buyers refuse to accept their parcels or fail to pay for their taxes. No refund will be processed for such cases.

Standard Shipping via YunExpress is a tax-inclusive option for some countries. However, Linsoul will not be responsible for additional administrative or handling fees charged by your local courier company or customs. Please kindly check this with your local customs.

For certain remote areas, there may be additional charges via Express Shipping. We will contact you if there is a need to make additional payments. 
Please contact us before placing an order, should you have any queries regarding shipping.  

How long does it take to receive the order after it is placed?

For in-stock products, your order will be shipped within 3 working days. You may check with our staff regarding the in-stock status of any products. 

Customized items will take a longer time. Please contact our staff for more information.

On normal non-sale days, once your parcel has been shipped out:

  • For Standard Shipping, it takes about 2-4 weeks for items to be delivered after shipping out. For some countries, it might take up to 2-3 months, depending on your country, its customs and other factors.* The duration for transit is something beyond our control. Linsoul will not be making refunds for such cases. Please consider an upgrade to Express Shipping or keep the waiting time in mind.
  • For Express Shipping, it takes about 3-7 days for items to be delivered after shipping out.

*Note: Timings might be affected due to festive seasons or other unforeseen circumstances

What happens if the parcel has been shipped but not delivered?
  1. First, kindly contact your local courier using the local tracking number.
    If your parcel were to be in transit for at least 3 months, it may have been lost in transit.
    For orders below $50USD, you may either opt for a one-time reshipment of parcel OR a full refund of the amount paid in cash via PayPal/Credit/Debit card.
    For orders above $50USD, we will only process a 50% refund of your order paid in cash via PayPal/Credit/Debit card. Should there be any concern about Standard Shipping, you are encouraged to opt for DHL Express Shipping instead.
  2. Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
    • Wrong address or phone number provided by recipient
    • Recipient was uncontactable when courier company contacted
    • Refusal to sign for the package by recipient
    • Lost or damaged parcel because recipient opted for “no-signature delivery”
    • Refusal to pay for the local tax/processing fee by recipient
    • Refusal to provide supporting documents for custom clearance by recipient
Who will pay for the import tax/custom fees

Customers have to bear any form of custom/import/processing fees that are applicable for your parcel.

Should you be unwilling to pay for the fees and reject the delivery of the parcel, you will still have to pay for the shipping cost. Linsoul will only refund the amount of your order after deducting the two-way shipping fees incurred.

How do I get help for my order?

Cancellation or/and modification of orders can only be done manually via our staff, provided that our Warehouse Team has not processed your order.
As our Support Team might not be available during non-working days and weekends, please place your order wisely.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email ( or website chat. We will help you with the changes if that could be done.

In general, upon receiving your parcel, please confirm the contents of the package and ensure that the package is in good condition before signing for it. All customers are strongly advised to take an unboxing video of their parcel and packaging when opening their parcels and products.

For faulty/missing items, please send an email to for after-sale services. The following details are required.
1) Send an email to with an appropriate Subject Title 
2) Provide your order number and state the issue clearly
3) Attach photos and videos to show that your product is faulty/missing. Shipping details on the parcel packaging have to be clearly visible.

If the photos/videos provided are insufficient to prove the stated issue, we will enquire more. Once the issue has been confirmed, we will arrange for a replacement, partial refund or a full refund (where applicable). For incorrect products, Linsoul reserves all rights in deciding whether you need to return the incorrect item or not. Please kindly contact us via email first. Our team aims to review your email within 3 working days.

For other queries, the fastest way to contact us is via our website or Discord

Linsoul Audio will not be responsible for parcels that have been damaged during the transit process.

Do I get tracking details for my order?

After placing an order, you will receive the order confirmation email. After your order has been shipped out, you will also receive a tracking email. You can track your order via the tracking number online. Should you not have received the emails or face any difficulties tracking your order, please kindly contact us for support.

For more than 1 orders placed under the same account and shipping address, Linsoul will automatically combine the orders and ship them out via one tracking number. Should you have special requests to have the orders shipped separately, please kindly contact us via Discord or our website's chat. We will do our best to help.

What shipping companies do you use?

We collaborate with these courier companies:
Standard Shipping: 4PX, UBI, NinjaVan, and Yun Express
Express Shipping: DHL Express, FedEx and SF Express

Last updated: 1 November 2022

You have successfully subscribed!
This email has been registered