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Questyle

Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp

Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp

£725.00 GBP
£816.00 GBP £725.00 GBP
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Specification

Questyle SIGMA Pro — Flagship Portable Bluetooth DAC/Amp

Studio-grade performance. Portable form. No compromises.

SIGMA Pro is Questyle’s newest flagship “all-in-one” portable DAC/headphone amplifier, engineered to bring reference monitoring performance into a truly mobile form factor. It combines dual-mono ESS ES9069Q DACs, Questyle’s patented Current Mode Amplifier with fully discrete, fully balanced output stages, and an XMOS XU316 USB interface for master-grade decoding up to PCM 768 kHz/32-bit, DSD512 (Native/DoP), and MQA full decoding.

Dual ES9069Q (Dual-Mono) Current Mode Amp ×4 (Discrete, Balanced) XMOS XU316 USB PCM 768/32 • DSD512 MQA Full Decode Bluetooth 5.4 • Snapdragon Sound aptX Adaptive/HD • LDAC 3.5/4.4/6.35 HP Out 3.5 SE In • 4.4 BAL In Stereo Recording 48 kHz/24-bit Dual USB-C (Charge+Data) 4300 mAh • 12 h

Key Features

  • Patented Current Mode Amplifier + TTA: Four groups of fully discrete, fully balanced current-mode output stages under Questyle’s Three-Tier Architecture (TTA) deliver massive headroom, ultra-low distortion and speed.
  • Dual-Mono DAC Architecture: Two ESS ES9069Q chips in dual-mono configuration for superior channel separation, dynamics and resolution.
  • Serious Drive Capability: Peak figures up to 25 Vp-p output swing, >8 W peak power and 5 A instantaneous current (design headroom for difficult loads).
  • Three Headphone Outputs: 3.5 mm SE, 4.4 mm balanced and 6.35 mm full-size for instant compatibility from IEMs to full-size headphones.
  • Dual Analog Line Inputs: 3.5 mm SE (nominal 1 Vrms) and 4.4 mm balanced (nominal 2 Vrms) to integrate turntables/phono stages, mixers or other analog sources.
  • Stereo Line-In Recording: Record analog inputs as 48 kHz/24-bit digital audio over USB with simultaneous monitoring (UAC-class driverless on most OS).
  • Two USB-C Ports: One audio/data-only, one charge-only for play-while-charging and lower phone battery drain.
  • Bluetooth 5.4 with Snapdragon Sound: Supports aptX Adaptive, aptX HD, LDAC, SBC/LE Audio for high-quality wireless input.
  • Long Battery Life: 4300 mAh pack delivers up to 12 hours; smart battery management keeps long sessions stable.
  • Bauhaus-inspired Chassis: Sand-blasted aviation aluminum with Kunlun glass window — minimalist, durable, and striking on any desk.

Creator-Ready Connectivity

Optical (Toslink) and Coaxial inputs cover legacy digital transports; USB handles modern lossless playback from phones and computers. With 3.5 mm SE and 4.4 mm balanced analog inputs, SIGMA Pro drops into studio and Hi-Fi chains seamlessly. Switch gain manually to match IEMs, studio headphones or desktop monitors via line-out.

Wireless, Certified

Built on Qualcomm Snapdragon Sound, SIGMA Pro passes both Snapdragon Sound and Sony LDAC certification for robust high-quality wireless audio. It pairs broadly across ecosystems and supports modern Bluetooth codecs for both fidelity and stability.

Specifications

Model Questyle SIGMA Pro
DAC Dual ESS ES9069Q (dual-mono)
USB Interface XMOS XU316 • UAC 2.0
Digital Inputs USB (PCM 44.1–768 kHz/32-bit; DSD Native 64/128/256/512; DoP DSD64/128/256; MQA render & full decode)
Optical (PCM 44.1–192 kHz/24-bit) • Coaxial (PCM 44.1–192 kHz/24-bit)
Analog Inputs 3.5 mm SE In (nominal 1 Vrms) • 4.4 mm BAL In (nominal 2 Vrms)
Headphone Outputs 6.35 mm • 3.5 mm • 4.4 mm balanced
Output Power (HP) 1200 mW @ 32 Ω (BAL) • 160 mW @ 300 Ω (BAL) • 40 mW @ 300 Ω (SE)
Performance THD+N 0.0002% @ 48 kHz/24-bit, 1 kHz sine • SNR 120 dB • FR 20 Hz–20 kHz (+0.8 dB)
Gain Control Line & HP Out: L / H / S (Studio) • IEM Out: L / H
Bluetooth v5.4 • Snapdragon Sound • aptX Adaptive / aptX HD / LDAC / SBC / LE Audio
Recording Stereo recording from analog inputs at 48 kHz/24-bit with live monitoring (USB Audio Class)
USB-C Ports 1× Audio/Data (device-powered), 1× Charge (5 V / 2 A), supports play-while-charging
Battery / Runtime 4300 mAh • up to 12 h • ~3 h charge time
Dimensions / Weight Approx. 155.7 × 85 mm • ~330.8 g
System Support Windows XP–11 (UAC2), macOS, Linux, Android, HarmonyOS, iOS/iPadOS (MFi licensed)

Package Contents

  • SIGMA Pro Portable Bluetooth DAC/Amp
  • USB-A to USB-C Adapter
  • USB-C to USB-C Cable
  • Warranty Card & User Manual
Notes: For maximum drive and stability with demanding headphones, use the 4.4 mm balanced output and appropriate gain. Use the audio/data USB-C for playback and the charge USB-C for power; play-while-charging is supported. Recording function captures analog inputs at 48 kHz/24-bit via USB and requires a compatible app or DAW.

What's in the Box?

Shipping & Returns

  • Free Standard full searchable Shipping
  • DDP(Delivered Duty Paid) Services, No payment on receiption
  • Free 7-Day Return Policy!

Shipping Fees

Worldwide Free Shipping on Hificat, Please allow 1-3 business days for conduct Quality Control in order to ensure the products quality.

In the event that a shipment is refused delivery by the recipient, is undeliverable, or is returned to sender, Hificat will process a refund to the original payment method used.

If a customer would like the order reshipped, they’ll be charged a reshipment fee. Customers may also be subject to a restocking fee of up to 20 percent of the product cost.

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Which Couriers To Use?

We collaborate with these courier companies:
Standard Shipping: Yanwen Express
Express Shipping(over $500 can be free): DHL Express, FedEx and SF Express

Hificat has extensive global logistics experience to ensure quality logistics services to consumers.

HiFiCat offers consumers different shipping, depending on the country, a choice of different shipping methods.

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Estimated Delivery Time


1. France, Germany, UK, Italy, Spain, USA.

All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 6-10 days to arrive.

Tracking Example

France: https://t.17track.net/en#nums=YT2132021222003141

Germany: https://t.17track.net/en#nums=YT2133621222016083

United Kingdom: https://www.17track.net/?nums=GV779664269GB

Italy:https://t.17track.net/en#nums=YT2133021222011717

Spain:https://t.17track.net/en#nums=YT2129521222003430

United States:https://t.17track.net/en#nums=SUA211205BIUQ1000007

2.EU Country：Filand, Poland, Estonia, Norway, Switzerland, Greece, Sweden, Israel, Czech Republic, Slovenia, Slovakia, Denmark, Netherlands, Latvia, Croatia, Austria, Hungary, Belgium, Bulgaria, Romania, Ireland, Malta, Iceland, Serbia and so on.

All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 10-15 days to arrive.

Filand: https://www.17track.net/?nums=UG324191515YP

Poland:  https://www.17track.net/?nums=UG335827360YP

Estonia: https://www.17track.net/?nums=UG363043181YP

Norway: https://www.17track.net/?nums=VR457380806YP

Switzerland: https://www.17track.net/?nums=UG359525911YP

Greece: https://www.17track.net/?nums=UG250851788YP

Sweden: https://www.17track.net/?nums=UG353458343YP

Israel: https://www.17track.net/?nums=UG356134837YP

Czech Republic: https://www.17track.net/?nums=UG320437102YP

Slovenia: https://www.17track.net/?nums=UG349882511YP

Slovakia: https://www.17track.net/?nums=UG349946557YP

Denmark: https://www.17track.net/?nums=UG272480001YP

Netherlands: https://www.17track.net/?nums=UG206078468YP

Latvia: https://www.17track.net/?nums=UG336264373YP

Croatia: https://www.17track.net/?nums=UG331204789YP

Austria: https://www.17track.net/?nums=UG322443180YP

Hungary: https://www.17track.net/?nums=UG313846849YP

Belgium: https://www.17track.net/?nums=UG313858025YP

Bulgaria: https://www.17track.net/?nums=UG309182635YP

Romania: https://www.17track.net/?nums=UG295530616YP

Ireland: https://www.17track.net/?nums=UG286654665YP

Malta:  

Iceland: https://www.17track.net/?nums=VR447888050YP

Serbia: https://www.17track.net/?nums=VR447710777YP

 

Ukraine: https://www.17track.net/?nums=UG331240667YP 

Russian Federation: https://www.17track.net/?nums=VR454415418YP

3.South America:Peru, Brazil, Chile

Chile: https://www.17track.net/?nums=UG205949999YP

Brazil: https://www.17track.net/?nums=UG207476109YP

South Africa: https://www.17track.net/?nums=VR446175857YP

4.Oceania：

New Zealand: https://www.17track.net/?nums=YE175499582CN
 Australia: https://www.17track.net/?nums=UG245685796YP

 

5.Canada By Canada Post, about 2 weeks.
6. Asia：
India: https://www.17track.net/?nums=UG297660021YP
Vietnam: https://www.17track.net/?nums=VR456508418YP 
Japan By Japan Sagawa Global Transportation. About 7 days.
Thailand By jt express. About 5-7days.
Malaysia by jtexpress.My  About 5-7days.
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