TANCHJIM FORCE
Open-Back Dual Dynamic Driver Flagship In-Ear Monitors
- Co-Developed with EFFECT AUDIO
- Flagship Dual Dynamic Driver Design
- HPFD-Seg Frequency Division Technology
- True Open-Back Soundstage
- Built-In DSP with Tuning App
- EFFECT AUDIO UltraFlex Cable
- Pressure-Balanced Shell and Tips
- Minimal Leakage, Maximum Comfort
-
Estimated Delivery:Sep 16 - Sep 20
-
Free Standard Shipping & Returns On all orders. Check if your country applies.

TANCHJIM FORCE
Precision Engineering from Two Legends
TANCHJIM and EFFECT AUDIO have come together to co-develop FORCE, combining TANCHJIM’s mastery of acoustic engineering with EFFECT AUDIO’s cable craftsmanship. Every part of the FORCE, from its custom dual dynamic drivers to its signature silver-plated cable, was born from deep collaboration. This partnership ensures a perfect balance of sonic performance and design, offering listeners a refined yet powerful Hi-Fi experience.
Premium Open-Back Design
Unlike traditional IEMs, the FORCE uses an open-back rear chamber featuring a fine steel mesh that allows air and sound waves to flow naturally. This unique design minimizes internal reflections and ear pressure, creating a more expansive soundstage while significantly reducing listening fatigue. Despite being open-back, the FORCE still offers excellent passive noise isolation and minimal sound leakage thanks to precise engineering and acoustic damping.
Flagship Dual Dynamic Driver Architecture
FORCE houses two custom dynamic drivers: an 8.2mm beryllium-coated mid-high driver and a 10mm titanium-coated bass driver, both using PU-suspended diaphragms. This setup, based on TANCHJIM’s DMT 4 Ultra driver platform, provides powerful bass, detailed mids, and sparkling treble. The materials and suspension allow for fast transient response, natural tonality, and rich dynamics without distortion—even at high volumes.
HPFD-Seg Frequency Division Technology
To ensure each driver performs optimally, FORCE employs TANCHJIM’s proprietary HPFD-Seg crossover technology. This high-precision frequency segmentation keeps both drivers working within their ideal range, reducing harmonic distortion and phase issues often found in multi-driver setups. The result is a cohesive, high-resolution sound that preserves micro-detail and emotional nuance.
Cable by EFFECT AUDIO
The included cable is handcrafted by EFFECT AUDIO using four strands of silver-plated UP-OCC single-crystal copper in a custom coaxial weave. This high-performance cable delivers exceptional signal purity and electrical conductivity, enhancing bass authority and treble extension. EFFECT AUDIO’s UltraFlex™ jacket makes it soft, skin-friendly, and durable for all-day comfort.
Built-In DSP and Custom EQ
The DSP version of FORCE supports USB-C digital output and integrates seamlessly with TANCHJIM’s official tuning app. Users can fine-tune their sound using a 5-band parametric EQ or choose from curated presets including Harman 2013, 2016, and 2019 target curves. Community presets and game sound profiles are also available, giving users endless customization options.
Ergonomics and Comfort Redefined
The FORCE’s shell is crafted from medical-grade, high-transparency resin for a second-skin fit. The outer faceplate is CNC-machined aluminum with a fine sandblasted finish, creating a striking visual contrast. The internal weight distribution is carefully balanced to reduce pressure points, and with the included T-APB pressure-balanced eartips, the fit remains stable and fatigue-free even during long listening sessions.
Free Standard Shipping
We Offer FREE Standard Shipping on all orders to Most of the World*
1 Year Warranty
Your Headphones, IEM's, AMPs and DACs, are covered by a warranty against factory defects.
Authentic Products
HiFiXAudio is an official distributor of the brands we carry. All products are genuine.
FAQ's
How long does it take to process an order?
For in-stock products, your order is expected to be shipped within 3 working days. Customized items and pre-orders take a longer time (do check in with our staff for more information). On normal non-sale days, once your parcel is shipped:
- For Standard Shipping, it takes about 2-3 weeks for items to be delivered after it is shipped. For some countries, it might take up to 1-2 months, depending on your country and its custom procedure. The duration for transit is beyond our control. Mechlands does not arrange refunds for such cases. Please consider an upgrade to DHL Express or keep the waiting time in mind.
- For Express Shipping, it takes about 3-10 days for items to be delivered after it is shipped.
Note:
Shipping methods and period might be affected and changed due to festive seasons, pandemic circumstances or other unforeseen circumstances.
What kind of shipping do you offer?
We have two shipping methods - Standard Shipping and Express Shipping.
Standard Shipping is free for most countries/areas.
Express Shipping via DHL Express or FedEx is 10-40USD (excluding tax) depending on your country. If your order is over 500USD, DHL Express Shipping is free*.
*KiiBOOM keyboards are not eligible for free shipping.
Shipping fees exclude import taxes or processing fees that may be applicable for your country. Mechlands 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.
Standard Shipping via YunExpress is a tax-inclusive option for some countries. However, Mechlands 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. Should you have any other queries regarding shipments, please contact us before placing an order.
Who does pay for the import tax/custom fees?
Customers have to bear any form of custom/import/processing fees that are applicable for your parcel.
If the custom fees and the delivery of the parcel are rejected by the recipient, the shipping cost still needs to be paid. Mechlands only arranges the refund of the order amount after deducting the shipping cost incurred.
Which countries do you ship to?
We are generally able to ship to most countries via Express Shipping, and many countries via Standard Shipping. Shipping methods may alter due to different situations. After proceeding to Checkout, the available shipping method(s) and cost will be stated before the payment page.
Note:
Note: For countries and areas of Africa, Alaska, Argentina, Canada, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few, we can only do Express Shipping. This may be subjected to changes due to unpredictable events such as pandemic, war, and etc.
How do I cancel 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 may not be available during non-working days and weekends, please place your order wisely as support cannot be guaranteed for such requests.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email (support@mechlands.com) or website chat. We will help you with the changes if that could be done.
For other queries, the fastest way to contact us is via our website or Discord
Do I get tracking details for my order?
After placing an order, you will receive the order confirmation email. After your order is shipped, 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 if i dislike the product once it arrives?
On the ground of disliking a product, you may return any non-customized and non-sales product that is sealed, within the 15 days upon receiving it. To be eligible for a return, your item must be unused and in the same condition that you received it. It also must be in the original packaging. Customized and sales products, accessories, or spare parts are excluded from the 15-day return policy. The shipping fee, handling fees, or any form of tax caused by return will NOT be refunded.
My product came with some kind of factory issue
For factory defective items within the first 30 days upon delivery, you would need to provide a solid proof. All customers are strongly advised to take an unboxing video of their parcel and packaging. If the item is defective due to manufacturing issues instead of unguided manual modifying/disassembling, Epomaker will provide a shipping label and reship the replacement unit or refund to you after receiving the return parcel.
Who applies to your free 15/30 Days Return Policy program?
*Our 15-day & 30-day warranty applies only to the following countries Canada, United States, Netherlands, Poland, United Kingdom, Czech Republic, Australia, Brazil, Saudi Arabia, Spain, Ukraine, France, Mexico, Italy, Chile, South Korea, Japan, Switzerland, United Arab Emirates, Portugal, Israel, Russia, Belgium and Germany. Customers in other countries may incur additional fees for warranty service.