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$23.00 USD

1DD+1BA Hybrid Driver HiFi In-ear Earphones

    Swappable tuning nozzles for different needs
    Aluminium alloy and resin mixed material faceplate
    Upgraded 0.75mm 2Pin recessed connector for longevity

Hybrid Technology, Fine-tuned By You

TRN-STM comes with a 10mm dual magnet dynamic driver for deep bass, coupled with a customized 30019 balanced armature driver for mid and high frequencies, resulting in clear treble, deep bass and rich mid-tones and crisp vocals. Professionally-tuned by TRN’s engineers using customized drivers, STM presents a vibrant yet comfortable sound that is non-fatiguing thus suitable for long listening. It will ascend your listening experience to the next level

10mm Dual Magnetic Dynamic Driver+Custom 30019 Balanced Armature.

STM comes with the dual magnet dynamic drivers which gives higher magnetic flux and high sensitivity, low impedance while also increases energy efficiency and transient response. The customized BA offers clear and open treble extension. It uses “armature+drive” rod that reproduce high-frequencies which diaphragm-based dynamic driver could not achieve. Giving faithful sound reproduction without losing micro details

Swappable Tuning Nozzles.

Aluminum alloy front plate combines with resin housing for rigidity and toughness. While the over-the-ear earhooks offer maximum comfort and stability, allowing you to focus on your music while performing daily activities. Meanwhile, such wearing method reduces microphonics transmit to the earpieces thus less interference

High-quality Alloy Housing Faceplate

Aluminum alloy front plate combines with resin housing for rigidity and toughness. While the over-the-ear earhooks offer maximum comfort and stability, allowing you to focus on your music while performing daily activities. Meanwhile, such wearing method reduces microphonics transmit to the earpieces thus less interference

Improved 0.75mm 2Pin 6N OCC Cable.

This product comes with a audiophile quality 4-core high-purity OCC mono-crystalline copper cable that enhances sound transparency, improves bass texture and adds body to vocal.The improved type-c connectors can effectively protect the contact pins from accidental breakage, which gives longevity and better wearing stability to the users

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Authenthic Products

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

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Worldwide Free Shipping

We are located in china but send our products worldwide for free.


1 Year Warranty

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


Online Support

We reply to all support inquiries within 3 working days.

Driver Configurations
-10mm dual-magnet dynamic driver -30019 balanced armatures
Frequency range
Plug  Type
3.5mm Straight Plug
Cable Length
Earphone interface
2Pin 0.75mm interface

Coming soon...


Coming soon...


Customer Reviews

Based on 3 reviews

TRN STM have good sound and they are good value for money. Only downside is the cable. It's too thin.

Nikolay Gramchev
Very musical! Big value and fun for the money!

Very musical iem, gives great enjoyment. Tuning filters are not gimmics, tuning filters do the job to change sound signature and interesting is that all 3 signatures are interesting to listen to.

Rogério T Aoki



Coming soon...


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 $199 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.

All items over $200 include free express shipping (DHL or similar). If your order total is under $200 you can manually add Express Shipping during the checkout period for $15.00 USD

Shipping FAQ's

Which countries do you ship to?

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

*Note: We can only do Standard Shipping for the UK, India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.

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 via DHL Express is 10-35USD depending on your country. If your order is over 200USD, DHL Express Shipping is free*.

*For some countries, DHL Express is only free for orders above $239USD. Large items such as headphones (e.g. HarmonicDyne Zeus, Gold Planar GL2000, and etc.) are exceptions as well.

Shipping fees exclude import taxes or processing fees that might be applicable for your country. Linsoul is not responsible for any form of such fees.

How long does it take to process my 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 2-3 weeks for items to be delivered after shipping out. For some countries, it might take up to 2-3 months, depending on your country and its customs. The duration for transit is something beyond our control. Linsoul will not be making refunds for such cases. Please consider an upgrade to DHL Express 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 my 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 shipping cost incurred.

How do I get help for my order?

For faulty/missing items, please send an email to to process warranty. In your email, please choose an appropriate Subject Title. Kindly include your Order Number, and state your issue clearly. Please also attach photographs/videos as “proof”, if any. 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

How do I order Custom In-ear Monitors (CIEMs) on Linsoul?

Please kindly check the following guide first: CIEM Ordering Guide

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.

What shipping companies do you use?

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