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Description
Experience Hybrid Sound Without the Hybrid Price
The TANCHJIM OLA II is the complete evolution of the highly acclaimed OLA series. Moving beyond the original single dynamic driver design, the OLA II introduces a coaxial 1 Dynamic Driver + 1 Balanced Armature hybrid architecture, delivering significantly better clarity, wider frequency extension, lower distortion, and a more natural listening experience.
Designed for audiophiles, musicians, gamers, and everyday music lovers, the OLA II combines TANCHJIM's proprietary DMT5 Dual Magnetic Circuit Dynamic Driver, the new PURE-Hi Ultra-High Frequency Balanced Armature, premium CNC-machined construction, and three connection options including an advanced DSP Type-C version with 8-band Parametric EQ.
Whether you enjoy vocals, orchestral music, rock, EDM, jazz, gaming, or movies, the OLA II delivers a clean, balanced, and highly detailed presentation that performs well across every genre.
Why Choose the TANCHJIM OLA II?
Unlike many budget hybrid IEMs that struggle with coherence between drivers, the OLA II uses a true coaxial acoustic design, placing both drivers on the same acoustic axis. This creates a seamless transition across the frequency range with better imaging, accurate instrument placement, and natural vocals.
Combined with an ultra-low distortion level of just 0.03% THD, the OLA II offers a level of refinement rarely found in its price category.
Proprietary DMT5 Dynamic Driver
At the heart of the OLA II sits TANCHJIM's latest 10mm DMT5 Dynamic Driver, engineered specifically to deliver powerful bass, natural mids, and excellent transient response.
The driver features:
- Dual magnetic circuit design
- Dual cavity acoustic structure
- Optimized diaphragm through finite element analysis
- Higher magnetic flux density
- Longer diaphragm excursion
- Better large signal control
This results in:
- Deeper bass extension
- Faster bass response
- Cleaner midrange
- Better dynamics
- Reduced distortion at higher listening volumes
PURE-Hi Balanced Armature for Exceptional Treble
Instead of forcing the dynamic driver to reproduce every frequency, TANCHJIM adds its newly developed PURE-Hi Balanced Armature dedicated exclusively to the highest frequencies.
Benefits include:
- Better air and sparkle
- Cleaner harmonics
- Improved micro-details
- More realistic cymbals and strings
- Reduced listening fatigue
By allowing each driver to focus on its strengths, the OLA II achieves a far more natural and effortless presentation.
Coaxial Hybrid Design for Better Coherence
Many hybrid earphones suffer from inconsistent imaging because their drivers sit in different positions.
The OLA II solves this by aligning both drivers on the same acoustic axis.
Advantages include:
- More accurate stereo imaging
- Better instrument separation
- Stable center vocals
- Precise sound localisation
- Consistent tonal balance
The result is music that sounds unified instead of split between multiple drivers.
Richer Vocals with Helmholtz Acoustic Chamber
The specially engineered rear cavity functions as a Helmholtz Resonator, carefully controlling internal air pressure to reinforce the vocal frequencies.
Listeners benefit from:
- Fuller male vocals
- Better female vocal presence
- Improved instrument body
- Natural timbre
- Excellent long-term listening comfort
Whether listening to acoustic recordings or vocal-heavy tracks, voices remain realistic and engaging.
DSP Type-C Version with Professional 8-Band PEQ
The DSP Type-C version transforms the OLA II into a fully customizable digital audio solution.
Features include:
- 384kHz / 32-bit decoding
- 8-band Parametric Equalizer
- Adjustable Frequency
- Adjustable Gain
- Adjustable Q Factor
- TANCHJIM App support
- Community EQ Presets
- Fine tuning for different music genres
Whether you prefer a reference sound or extra bass, the DSP version lets you personalize the tuning without compromising audio quality.
Three Versions to Match Every Audio Setup
Choose the version that best suits your device and listening style.
3.5mm Version
Perfect for smartphones, laptops, DACs and portable players.
- Includes microphone
- Universal compatibility
- Ideal for everyday use
4.4mm Balanced Version
Built for audiophiles using balanced outputs.
- Higher output power
- Lower noise floor
- Improved channel separation
- No microphone
DSP Type-C Version
Ideal for modern smartphones and laptops.
- Built-in high-resolution DSP
- 8-band Parametric EQ
- Microphone included
- Plug-and-play convenience
Comfortable for Hours of Listening
The compact shell has been refined using data collected from over 3,000 ear scans, ensuring a secure and comfortable fit for a wide variety of ear shapes.
The lightweight construction helps reduce fatigue during:
- Long music sessions
- Gaming
- Video streaming
- Office work
- Daily commuting
Premium CNC Aluminium Construction
The faceplate is precision-machined from aerospace-grade aluminium, while the transparent PC shell showcases the internal acoustic design.
Benefits include:
- Premium appearance
- Lightweight design
- Improved durability
- Comfortable everyday wear
High-Purity Litz Silver-Plated Copper Cable
The included cable is designed for stable signal transmission and long-term durability.
Features include:
- Litz braided structure
- Silver-plated copper conductors
- Reduced electromagnetic interference
- Lower signal loss
- Detachable 0.78mm 2-Pin connector
Upgrade cables anytime thanks to the standard 2-pin connection.
Who Is the TANCHJIM OLA II For?
The OLA II is an excellent choice if you're looking for:
- Your first high-quality audiophile IEM
- A balanced tuning with excellent vocals
- Better detail than typical single dynamic driver earphones
- Low distortion and accurate sound
- Customizable DSP EQ
- A comfortable daily-use earphone
- Gaming with accurate positional audio
- A premium IEM without spending flagship money
Frequently Asked Questions
Is the TANCHJIM OLA II good for vocals?
Yes. Its Helmholtz acoustic chamber and coaxial driver design produce rich, natural, and well-defined vocals for both male and female singers.
Is the bass strong?
The bass is clean, controlled, and dynamic rather than overly boosted. It prioritizes texture, speed, and accuracy over excessive quantity.
Does the DSP version work without a DAC?
Yes. The DSP Type-C version includes its own built-in high-resolution DSP and DAC, allowing direct connection to compatible USB Type-C devices.
Can I change the sound signature?
Yes. The DSP Type-C version supports an 8-band Parametric EQ through the TANCHJIM App, allowing complete tuning customization.
Does it support cable upgrades?
Yes. It uses a standard 0.78mm 2-pin detachable cable.
Which version should I buy?
- 3.5mm – Best for universal compatibility and includes a microphone.
- 4.4mm – Best for balanced outputs on dedicated DACs and DAPs.
- DSP Type-C – Best for smartphones and users who want customizable EQ.
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The KZ Castor Pro is one of the best entry-level IEMs I've used in this price range. The sound quality is impressive, with clear vocals, detailed instruments, and punchy bass that doesn't overpower the mids. It offers excellent clarity, making every song enjoyable.
It's also a fantastic choice for beginners who want to experience audiophile-grade sound without spending a lot of money. Whether you're listening to music, watching movies, gaming, or enjoying podcasts, the audio feels clean and immersive.
The comfort is good for long listening sessions, and the build quality feels solid. If you pair it with a decent DAC, the sound becomes even better with improved detail and separation.
Overall, I highly recommend the KZ Castor Pro to anyone looking for an affordable entry-level IEM. It offers outstanding value for money and is a great starting point for anyone entering the audiophile hobby.
I can catch all the little details in songs with the hi-res audio. I chose these earphones to enhance my movie-watching experience, and they do the job. I watched a bunch of scenes from 'Dhurandhar: The Revenge' over and over, and these IEMs gave me a hell of an experience! It felt like I was watching this movie in a theatre for the first time.
Big thanks to The Audio Store for bringing these experiences to us!
Overall very Good product but value for money is High
Excellent IEMs for the price. The sound quality is clear and detailed, with great instrument separation and balanced tuning. They're also comfortable for long listening sessions. Definitely one of the best options in this price range.
Delivery was on time, packing was nice. Product is well producted. Iems themselves are good and best in this budget range. But require specific frequency and players to get most our of them.
for me this is a game changer it helped me a lot .
value for money
it supports in all devices including macbook and ios devices .i am really satified with purchase . thank you
The Audiocular Beam Portable DAC is definitely worth it. The metal build along with the braided cable feels reassuring and sturdy, and the DAC never felt considerably warm even during longer listening sessions. It also maintains a somewhat neutral sound signature as far as I can tell, and noticeably increases the perceived volume of my KZ Castor Pros. Furthermore, I personally haven't heard any hissing noises on my IEMs, if that is something you're worried about. Finally, the red LED ring light is a cool touch, if a bit gimmicky and distracting during late-night listening sessions, but the bonus Audiocular carrying pouch along with the Type-A converter included in the package is what makes this a great deal. If you're looking for a DAC around ₹1,000, you should certainly consider the Audiocular Beam.
Clean, refined, and smooth audio! Absolutely a great product.
Such a good product is it and the quality of is top notch.
Really happy with the GK Kunten. The build quality feels premium for the price - sturdy metal-look faceplates and a nice detachable braided cable that doesn't tangle easily. Fit is comfortable even for longer listening sessions thanks to the ergonomic shell shape.
Sound-wise, the dynamic driver delivers a full, balanced signature — punchy bass without being overdone, clear mids, and decent treble extension without harshness. The inline mic is a nice bonus for calls.
For the price after the discount, this is excellent value. Packaging was neat and delivery was quick. Would recommend to anyone looking for 'id entry-level IEM upgrade
Cristal clear sound quality.
"Unbeatable planar clarity, smooth treble, and deeply immersive soundstage at this price point!"
I recently purchased the Letshuoer S12 Ultra from The Audio Store, and pairing it with my Samsung S24 Ultra, FIIO BTR17 (via 4.4mm Balanced), and Apple Music Hi-Res Lossless has been nothing short of extraordinary. It delivers a truly world-class listening experience!
Key Highlights:
Planar Technicalities & Imaging: The 14.8mm Planar driver offers lightning-fast transients, laser-sharp instrument separation, and a surprisingly wide, holographic soundstage.
Smooth & Energetic Tuning: Compared to earlier S12 iterations, the Ultra brings a much smoother upper-mid/treble presentation with zero sibilance, while retaining authoritative, deep sub-bass rumble.
Synergy with BTR17: The dual ES9069Q DAC and clean THX amplification from the FIIO BTR17 give the S12 Ultra all the juice it needs to shine.
Build & Accessories: Excellent CNC aluminum shells, ultra-comfortable ergonomics, and a modular 3.5mm/4.4mm silver-plated cable right out of the box.
Verdict:
If you want an endgame-level portable audio setup without breaking the bank, look no further. Kudos to The Audio Store for the lightning-fast delivery and top-notch packaging! 🎧 absolute recommended!
The DAC works like a charm. Works with various devices. Recommended even if it does not come with PEQ. Try Equalizers of your choice to tune the sound as per your taste. I have paired it Duonic (improved bass version)
Just received my order and these little thing is fabulous. Like it just increased my iems potential. Solid quality and looks premium. Easy to carry comes with a fabulous quality case which you can use to store your iems too. Moreover there was really a difference without it and with it in sound and overall. So go for it without any hesitation ✌️
The audio quality is amazing. The noise barely escapes to outside. Overall a great purchase worth the price
