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Product Snapshot
Description
EarAcoustic STA Pro Dual Dynamic Driver IEM
Balanced, Analytical & Fatigue-Free High-Fidelity Sound
The EarAcoustic STA Pro is a precision-engineered dual dynamic driver in-ear monitor built for audiophiles, professionals, and critical listeners who demand clarity without fatigue. Featuring a 10mm ultra-clear composite diaphragm for authoritative bass and natural mids, paired with a 6mm high-speed composite driver for crisp, controlled highs, the STA Pro delivers a wide soundstage, clean transients, and rich micro-details across the frequency spectrum.
Powered by Tesla-level N50 magnets producing ~10,000GS magnetic flux, the STA Pro achieves ultra-low distortion (<0.5% THD), lightning-fast <3ms transient response, and a tightly controlled ~50ms bass rebound. The result is a smooth, balanced, and immersive sound signature with excellent instrument separation—ideal for long listening sessions, studio monitoring, and high-resolution music playback.
Dual Dynamic Driver Architecture for Pure Sonic Accuracy
At the heart of the STA Pro is a dual-core dynamic driver array.
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The 10mm graphene-infused diaphragm handles lows and mids with authority, texture, and speed
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The 6mm composite diaphragm delivers extended, airy treble without harshness or sibilance
This configuration ensures natural timbre, fast decay, and distortion-free dynamics, allowing vocals, instruments, and ambience to remain clearly defined even in complex tracks.
Balanced & Analytical Sound Signature
The EarAcoustic STA Pro is tuned for neutral-leaning balance with musical warmth:
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Tight, controlled bass with realistic impact
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Forward yet natural mids for vocals and acoustic instruments
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Smooth, airy treble that reveals detail without fatigue
Its holographic presentation and wide soundstage make it versatile across genres—from EDM and rock to jazz, classical, and film scores.
Year of the Snake Inspired Design
Inspired by the 2025 Year of the Snake, the STA Pro features serpentine resin faceplates with iridescent scale detailing and flowing contours. Crafted in Shenzhen, the shells blend mythical artistry with modern acoustic engineering, making the STA Pro as visually striking as it is sonically refined.
Ergonomic Fit for All-Day Comfort
Designed using real-ear canal data, the STA Pro’s lightweight zinc-alloy shells offer:
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Secure, low-profile fit
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Effective passive noise isolation
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Reduced pressure points for extended listening
Multiple eartip sizes ensure optimal seal and comfort, whether at a desk, studio, or on the move.
Premium Detachable Audiophile Cable
Included is a 1.2m high-purity 0.78mm 2-pin detachable cable, constructed from oxygen-free copper and silver-plated mixed-weave strands. Professionally built for pure signal transmission, it offers:
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Zero audible microphonics
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Minimal signal loss
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Durable, tangle-resistant construction
The detachable design also allows easy upgrades with aftermarket cables.
Specifications
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Brand: EarAcoustic
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Model: STA Pro
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Driver Configuration: Dual Dynamic (10mm + 6mm)
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Impedance: 22Ω
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Sensitivity: 108dB
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Frequency Response: 10Hz – 30kHz
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Total Harmonic Distortion: <0.5%
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Transient Response: <3ms
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Bass Rebound: ≈50ms
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Magnetic Flux: ~10,000GS (N50 magnets)
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Cable Connector: 0.78mm 2-pin
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Cable Material: OFC / Silver-plated mixed weave
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Cable Length: 1.2m
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
These sound great! And for the price! Crazy! I do miss the volume controls on the buds themselves, but it's not that big a deal! It was great dealing with you guys too! Thanks!
Excellent product at this price I am very satisfied with the product and they delivered very fast thank you Audiocular
Works as intended, provides clean signal from source 3.5mm to dual RCAs, and I've been enjoying my Chord Mojo 2 as desktop DAC fed to the Aune S17 Evo headphone amp, via my trusty Beyerdynamic T1 (3rd Gen) . Very well built cable. This is my 4th or 5th cable from Ear Audio, and as always, brings complete satisfaction to audio enjoyment.
I was exactly looking for this. It's very convenient to have Y shaped type C cable. I can sleep wearing this earphones. Sound quality is good after applying equalizer from online. I feel it will open up after using it for few hours. Mic quality seems to be also good. Its affordable and seems to be complete package. I hope moondrop considers to keep releasing next versions of marigold. It's really convenient to wear it as we don't have to fear it dropping from ears. We can just keep it on our shoulders when not hearing.
Most bast DACK on this prise range an existing case and type -c to USB converter otg buty full luck and wark quality thank you 🌹
Best one for starters...
It is my first IEM and its really good. The clarity, the details and the separations are noticeable( if I compare it to my previous tws with the same cost).
Very good
Very good product.
Very subtle and balanced audio output.
Thanks.
Received product in excellent packaging. Satisfactory performance using with mobile and laptop. No significant heating. There is no noise which is the reason I had changed to this DAC from the earlier one.
Good dac, i had previously one 3.5 to c tye converter it was basic with no chip .this dac really draw out the juice from your phones to shake drivers . Nd if u guys have impedance issue you can use equilizer nd see the magic . This dac works well. Nd yes dac is essential to draw out the required Current/power.
V8....Sound...👌✌️👍
Best..👌✌️👍
I am extremely satisfied with EarAudio 3.5mm Male to 4.4mm female adapter cable. The quality of the product is top notch and well made. I am now able to use my 4.4 mm balanced cable with my iems. Recommended!
Review after using it for a few weeks.
The sound quality is really impressive. It is not the absolute best, but one of the best in this budget segment.
The soundstage is wider and instrument separation is really good. I like its natural, linear bass (I am not a basshead). It has smooth, soft, comfortable, and discreet treble (which might not be good for trebleheads). With .flac and LDAC, there is a significant difference. It is good for both male and female voice types.
These might not be the best-sounding, most technical TWS in that budget, but they are good for my use cases.
ANC is good, though it might be improved. Mic quality is good enough, but it sometimes feels a little muffled.
Personally, the diagonal earpieces and oval rubber ear tips fit perfectly. They are comfortable for a long time. Battery life is good for me but not comparable with others; It would be good if there were a feature in the app to see the battery percentage of the case.
Custom and online DSP features are good. However, LDAC can't be used simultaneously with custom DSP and multipoint connections; this should be changed in the next firmware update. Also, sometimes the app feels glitchy and slow.
There is no IP rating mentioned, and the open-lid design is negative.
I might be forgetting something.
While this isn't as much of a "value for money" pick as the Space Travel 2, it is worth it for me because of the sound quality.
My first time buying experience with TheAudioStore is very good
