Home Recommend Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
  • Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp - The HiFi Cat
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Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp

Questyle SIGMA Pro Flagship Portable Bluetooth DAC/Amp

$899.00 USD
$1,011.00 USD $899.00 USD
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Canada, Mexico, Romania, United States: import duty of 10 USD

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.

Shipping & Returns

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

⚠️ Important Notice: EU Customs Reform Effective 1 July 2026

A new tariff system will take effect across all 27 EU member states starting 1 July 2026. The EU is abolishing the duty exemption for low-value parcels — all goods entering the EU will now be subject to customs duties, including a fixed duty of €3 per HS tariff code category for IOSS-declared goods under €150.

A handling surcharge of USD $5 has been applied to all standard shipments to EU countries on orders under $500. Orders over $500 qualify for free expedited shipping.

Shipping Fees & Couriers

We collaborate with the following courier companies:

  • Standard Shipping: Yunexpress, 4PX, NinjaVan
  • Special Country Channels: India – Yitong Express | United Kingdom – Royal Mail | Japan – Sagawa Global Transportation
  • Express Shipping (orders over $500 ship free): DHL Express, FedEx, UPS, SF Express

In the event that a shipment is refused, undeliverable, or returned to sender, HiFiCat will process a refund to the original payment method. If a customer requests reshipment, a reshipment fee will apply. A restocking fee of up to 20% may also apply.

Shipping Rates & Estimated Delivery Times

1. France, Germany, United Kingdom, Italy, Spain, Poland

All taxes and duties are prepaid (DDP). 5–10 working days. Free standard shipping.

Tracking examples:

2. EU 27 Countries (Standard Shipping)

Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Cyprus

All taxes and duties are prepaid (DDP). 10–15 working days.
💰 Shipping cost: $5.00 USD (orders $0–$500) | Free (orders $500+, via DHL Express)

Tracking examples:

3. Other European Countries (Free Standard Shipping)

Norway, Switzerland, Ukraine, Armenia, North Macedonia, Moldova, Monaco, San Marino, Vatican City, Serbia, Albania, Kosovo, Montenegro, Bosnia & Herzegovina, Belarus, Georgia, Andorra, Guernsey, Jersey, Faroe Islands, Svalbard & Jan Mayen, Guadeloupe, Réunion, Gibraltar, Isle of Man, Mayotte, Iceland, Liechtenstein, Turkey

All taxes and duties are prepaid (DDP). 10–15 working days. Free standard shipping.

4. Americas

5. Oceania

6. Asia

Track Your Order

Main tracking portal: https://t.17track.net/

Contact Us

📧 Email: support@thehificat.com
📞 Tel: +8619270016096

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