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Description
Questyle SIGMA Pro Flagship Wireless Hi-Res Lossless Portable DAC & Amp
Studio-grade performance. Portable form. Zero compromise.
The Questyle SIGMA Pro is a true flagship portable DAC & headphone amplifier, built for audiophiles, professionals, and creators who demand reference-level sound anywhere. Designed around Questyle’s legendary Current Mode Amplifier technology, SIGMA Pro delivers exceptional speed, transparency, and control — whether you're driving sensitive IEMs or power-hungry full-size headphones.
At its core lies a dual-mono ESS ES9069Q DAC architecture, paired with four fully discrete, fully balanced current-mode amplification stages under Questyle’s proprietary Three-Tier Architecture (TTA). The result is massive dynamic headroom, ultra-low distortion, and a presentation that remains clean, fast, and emotionally engaging even at high output levels.
Powered by an XMOS XU316 USB interface, SIGMA Pro supports PCM up to 768 kHz / 32-bit, native DSD512, and full MQA decoding, delivering master-grade playback from smartphones, laptops, tablets, and digital transports.
Flagship Power Meets True Portability
Despite its compact form, SIGMA Pro offers serious drive capability — with up to 25 Vp-p output swing, over 8 W peak power design headroom, and 5 A instantaneous current. This makes it equally capable with ultra-sensitive IEMs and demanding planar headphones.
Three dedicated headphone outputs — 3.5 mm single-ended, 4.4 mm balanced, and 6.35 mm full-size — allow instant compatibility across all setups without adapters.
Creator-Ready Connectivity & Recording
Beyond playback, SIGMA Pro is also a powerful portable audio hub.
With 3.5 mm single-ended and 4.4 mm balanced analog inputs, it integrates seamlessly with turntables, phono stages, mixers, and external sources.
A standout feature is stereo line-in recording, allowing analog sources to be captured digitally at 48 kHz / 24-bit via USB, with real-time monitoring — perfect for content creators, musicians, and mobile recording setups.
Certified Wireless Hi-Res Audio
Built on Bluetooth 5.4 with Qualcomm Snapdragon Sound, SIGMA Pro supports:
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aptX Adaptive
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aptX HD
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LDAC
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SBC & LE Audio
With both Snapdragon Sound and Sony LDAC certification, wireless playback remains stable, low-latency, and remarkably close to wired fidelity — ideal for modern audiophile lifestyles.
Thoughtful Design, Built to Last
The chassis follows a Bauhaus-inspired industrial design, crafted from sand-blasted aviation-grade aluminum, accented with a Kunlun glass window. The result is a device that looks as refined on a studio desk as it feels in hand.
A 4300 mAh battery delivers up to 12 hours of playback, while dual USB-C ports enable play-while-charging with reduced smartphone battery drain — a critical feature for long listening or studio sessions.
Specifications
Model: Questyle SIGMA Pro
DAC: Dual ESS ES9069Q (Dual-Mono)
Amplifier: Fully discrete Current Mode Amplifier ×4
USB Interface: XMOS XU316 (UAC 2.0)
Digital Inputs:
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USB: PCM 44.1–768 kHz / 32-bit
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DSD Native 64/128/256/512
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DoP DSD64/128/256
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MQA Full Decode
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Optical & Coaxial: PCM up to 192 kHz / 24-bit
Analog Inputs:
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3.5 mm SE In (1 Vrms)
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4.4 mm Balanced In (2 Vrms)
Headphone Outputs:
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6.35 mm
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3.5 mm
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4.4 mm Balanced
Output Power:
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1200 mW @ 32 Ω (Balanced)
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160 mW @ 300 Ω (Balanced)
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40 mW @ 300 Ω (Single-Ended)
Performance:
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THD+N: 0.0002%
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SNR: 120 dB
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Frequency Response: 20 Hz – 20 kHz (+0.8 dB)
Gain Control:
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Line/HP: Low / High / Studio
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IEM: Low / High
Bluetooth:
Bluetooth 5.4 • Snapdragon Sound
aptX Adaptive • aptX HD • LDAC • SBC • LE Audio
Recording:
Stereo 48 kHz / 24-bit via USB (with monitoring)
Battery:
4300 mAh • Up to 12 hours
Charging Time: ~3 hours
Dimensions / Weight:
Approx. 155.7 × 85 mm • ~330.8 g
System Support:
Windows, macOS, Linux, Android, iOS/iPadOS (MFi), HarmonyOS
Package Contents
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Questyle SIGMA Pro Portable DAC & Amp
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USB-C to USB-C Cable
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USB-A to USB-C Adapter
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Warranty Card
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User Manual
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Let customers speak for us
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
The protective case is made of good quality material and protects the TWS perfectly. The fit is good, but sometimes when taking the buds out, the charging case shifts slightly upward. I put a small piece of paper inside, and now it is perfect.
The texture and colour of leather is good, but it looked washed out because of my phone's camera.
I don't know if it is great value for money, but it provides good protection.
👍
