TAS Commitment
Product Snapshot
Description
Redefining Dynamic Driver Performance
The KZ Castor Pro In-ear Monitors revolutionizes the traditional limitations of single dynamic driver earphones. Featuring dual 10mm dynamic drivers, it ensures an expansive soundstage with high-fidelity audio, offering a transformative listening experience.
Precision Acoustic Engineering
With professional-grade electronic crossover technology and a high-precision four-level tuning filter, the KZ Castor Pro achieves unmatched sound clarity. Each component is meticulously designed to deliver a harmonious blend of bass, midrange, and treble for a full-range Hi-Fi experience.
Dual Versions for Personalized Sound
The KZ Castor Pro Earphones offer two variants:
- Harman Target Version: Tuned for a refined frequency curve aligned with the Harman target, delivering balanced and natural sound.
- Harman Target with Improved Bass Version: Enhanced low-frequency response with dual sensitivity and dynamic range improvements.
Unrivalled Bass and Frequency Integration
Equipped with an independent low-frequency driver, the KZ Castor Pro delivers deep, impactful bass while maintaining clarity in the mid and high ranges. Professional crossover technology ensures seamless frequency transitions, capturing every nuance with precision.
Customizable Tuning for Your Unique Sound
A four-stage tuning switch allows you to personalize your audio experience effortlessly:
- Bass levels can be adjusted up to +2dB.
- Mid and high frequencies can be enhanced by +2dB.
Fine-tune your sound for every genre and preference.
Luxurious Zinc Alloy Casing
The durable zinc alloy housing combines a lightweight design with luxury. Each detail reflects exceptional craftsmanship, ensuring a premium look and feel.
Ergonomic Design for All-Day Comfort
The skin-friendly resin cavity and silicone ear tips provide a secure and comfortable fit, even during extended use. Its ergonomic design ensures minimal fatigue, making it ideal for long listening sessions.
Oxygen-Free Copper Cable for Pristine Sound
The high-purity oxygen-free copper flat cable ensures excellent signal transmission for accurate sound reproduction. The durable TPE outer sheath resists wear and tear, guaranteeing longevity without compromising performance.
Effortless Controls and Clear Communication
The in-line remote control offers easy access to music playback, call management, and voice commands. Its built-in microphone ensures crystal-clear communication, enhancing your overall convenience.
Eco-Friendly Packaging Philosophy
KZ maintains a commitment to sustainability with its simple and eco-friendly packaging. The focus remains on delivering exceptional product quality without unnecessary waste.
AUDIOCULAR SPARK Hi-Res Portable DAC Dongle (CX31993 + MAX Amp)
Experience Studio-Grade Audio Anywhere
The AUDIOCULAR SPARK is a premium Type-C to 3.5mm portable DAC dongle, built to transform your everyday listening into a high-fidelity experience. Powered by the flagship CX31993 DAC chip and MAX97220 amplifier, the SPARK delivers studio-quality audio with exceptional clarity, rich bass, and crisp detail—making it the ideal upgrade for audiophiles, music lovers, and gamers on the go.
Key Features
🎧 Flagship DAC + Amplifier Combo
Featuring the powerful CX31993 DAC and MAX97220 amp, SPARK offers expansive sound with dynamic lows, smooth mids, and ultra-clear highs—free from distortion or harshness.
🔊 Hi-Res Audio Support (32bit/384kHz)
Enjoy PCM 32bit/384kHz and ADC 24bit/96kHz audio decoding. With an SNR >124dB and THD+N as low as 0.000003, your audio stays pure, detailed, and immersive.
💪 High Power Output
SPARK delivers up to 63mW at 32Ω, ideal for driving IEMs and headphones between 16–32Ω. Whether you're on mobile or desktop, hear your music fully come alive.
🎵 Immersive Soundstage & Isolation
Perfect for gaming or movies, SPARK creates a wide and accurate soundstage, restoring subtle background effects while reducing external noise distractions.
🔗 Seamless Type-C to 3.5mm Compatibility
Easily connect your favorite wired headphones to smartphones, tablets, or notebooks with USB-C ports—no compromises on sound quality.
🧳 Ultra-Portable and Travel-Ready
Its compact, lightweight design fits easily in your pocket or case—ideal for commuting, working, or relaxing on the go.
🛠️ Durable & Audiophile-Grade Build
Built with 8-strand silver-plated copper wire and a gold-plated 3.5mm jack, the SPARK ensures optimal conductivity, durability, and long-term performance.
🔌 Universal Device Support
Works flawlessly with most Android phones, laptops, and tablets with Type-C ports—no driver required for plug-and-play convenience.
Specifications
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Model: AUDIOCULAR SPARK
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DAC Chip: CX31993
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Amp Chip: MAX97220
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Decoding Support: PCM 32bit/384kHz, ADC 24bit/96kHz
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Power Output: 63mW @ 32Ω
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Signal-to-Noise Ratio (SNR): >124dB
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Dynamic Range (DNR): >120dB
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THD+N: 0.000003
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Compatibility: 16–32Ω headphones
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Connector: USB Type-C to 3.5mm
Why Choose AUDIOCULAR SPARK?
If you're looking for a hi-res DAC dongle under budget that doesn’t compromise on build quality, sound fidelity, or power output, the AUDIOCULAR SPARK is your ideal pick. It’s a true plug-and-play solution that elevates your everyday audio into a rich and immersive sonic journey.
✅ Ideal For
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Audiophiles & Music Enthusiasts
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On-the-go Hi-Fi Listening
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Mobile Gamers
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Commuters & Remote Workers
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Let customers speak for us
Various reviews on the net created a lot of desire and interest to possess this iem.
Hitherto iv been buying audio gear from some other website who did not have this iem in stock.
Thought of buying from Audiostore.
I spoke to Mr Pritam and finalised the deal. Personal interactions do add up to the textual.content you gather from the net. Delivery was exactly as promised.
My first impression of the iem is Spectacular sound reproduction!!!
Songs thatIheardliterallyfelt like being played in front of me.
Bass sufficiently good enough for every listener except bassheads. Of course bassheads would lose considerable amount of ther sonic capabilities.
Soundstage wide and imaging is excellent. Inspite of good bass every instrument is distinctly clear and precise.
Only request for Audiostore is to include other leading brands like Fatfreq, Fiio, Ibasso etc.
My honest review these are best and luxury looking IEMS and I love them and they fit in my ear perfectly for me and I love them
This IEM sound really good for everyday listening. The Bass has a nice punch,Vocals come through clear and the overall sound feels balanced and enjoyable.They’re comfortable to wear for long periods and block out a decent amount of outside noise.Easy to carry around as it’s comes with a pouch and Great for Music,Videos.Definitely worth it for the price, and specifically thanks for audiostore team.❤️❤️.
The bass in these stays present and hits quickly. An easy term to describe the feel is cinematic bass. And it get loud very fast recommend use Low gain with high volume or High gain with Low volume. Prefer your your choice.
After 10 days of use, I feel I made a great upgrade from the 7Hz Elua Ultra. The main differences are that the Elua has laid-back vocals and sub-bass rumbling, while the STA Hi-End surpasses those limitations with good imaging, zero distortion at high volumes, and cinematic punch in the sub-bass.
Here is the detail review with help of claude to differentiate the same batch of IEM just at "ONE POINT"
link : https://claude.ai/public/artifacts/c3f98fc2-1929-415d-bc4a-4833928662d5
looks good , Sound is balanced, you can listen music,watch movies and also good for gaming.Bass is good not that much punchy but does not muddy details . No distortion at Max volume .
At first use I have loved the sound and the fit of the iem so far the best budget iem I have ever used go for it guys value for money product.
Excellent experience with TheAudioStore.in!
I ordered the KZ Duonic Tri-Magnet IEM, which was already going out of stock everywhere, and despite multiple courier issues from Blue Dart, the store support team stayed responsive and assisted throughout the process.
Packaging was good, product is genuine, and customer support was polite and helpful during the delay. The delivery issue was mainly from the courier side, not the store.
Finally received the IEM safely and absolutely loving the sound quality. Would definitely recommend TheAudioStore.in for audio enthusiasts and IEM lovers 🎧
The DAC has no hissing sound and the other shell is build of metal. great wire quality no heating issues as well. also the red light is menacing as hell. also case is included which is fine/cheap quality. also type a to c converter is also given in box.
This is a very comfortable IEM, I can wear them for hours without experiencing discomfort or ear fatigue. The shell are relatively small, very light and fits perfectly in my small ear. The eartips are also good and doesn't cause irritation in ear canal.
It is my first iem that i have purchased and it turned out to be the best decision ! I researched a lot before buying it as i am a bass lover. Finally bought KZ Duonic with switches c type. Every note is so clean and for every type of song it adjusts the sound. Delivery was before time and even the packaging was great! Thank you The Audio Store ❤️
After trying multiple ear tips, finally I’ve settled with Divinus Velvet ear tips along with Spinfit-W1. This is perfectly sealed for me and gives that great sounding with any of the IEMs I own. Recommended. Thanks audiostore
Its perfect no doubts there but the silver plated itself is high quality but wire built and the eartips are of low quality mic is clear and perfect.🔥👍
One of best Dac in upper mid range category, it has most powerful Sgm8262 amp along with Cs43131 successor dac. The Aura seamlessly connects with my iPhone 15 and my window Laptop. Sound quality omg what a mind boggling Sound I am getting through this with MoondropNice earphone. That's exceptional. Somehow it has connections issues with My oneplus nord 4 due to oxygenOS 15. May be it will sort out after oxygen OS updates.
ThanksAudiocular team .
I loved it , surprised totally. What a sound separation.
I was a bit sceptical about ordering it from The Audio Store as I order from Headphone Zone.
But great shopping experience with The Audio Store.
This is first time experienced IEM in ever I love this❤
