SKU: 80294696157

Questyle SIGMA Pro Flagship Portable DAC/AMP

$50580.00 $56200.00
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Description

Questyle SIGMA Pro Flagship Portable DAC/AMPDescription Questyle Sigma Pro is a flagship portable Bluetooth DAC Amp featuring Questyle's patented Current Mode Amplification and a dual mono ESS ES9069 DAC layout. It provides massive power (>8W peak) and high res audio (PCM 768kHz DSD512) with 3. 5mm 4. 4mm 6. 35mm outputs. Housed in aluminum with Kunlun glass, it includes 3 gain modes and dual USB C ports. Get this amazing DAC now from the official dealer of Questyle in Bangladesh, Gears for

Description

Questyle Sigma Pro is a flagship portable Bluetooth DAC/Amp featuring Questyle's patented Current Mode Amplification and a dual-mono ESS ES9069 DAC layout. It provides massive power (>8W peak) and high-res audio (PCM 768kHz/DSD512) with 3.5mm/4.4mm/6.35mm outputs. Housed in aluminum with Kunlun glass, it includes 3 gain modes and dual USB-C ports. Get this amazing DAC now from the official dealer of Questyle in Bangladesh, Gears for Ears today with an official 1 year warranty. 

Latest Flagship SIGMA Pro - Portable DAC with Headphone Amplifier

SIGMA Pro is our flagship portable DAC/amp, built on Questyle's pursuit of audio perfection. It is a technological benchmark that proves performance and portability can coexist, delivering a truly "Portable Professional audio equipment" experience. SIGMA Pro delivers desktop-class specs and sound quality. It houses four sets of Questyle-patented, fully discrete current-mode analog amplifier stages, a dual-mono ESS ES9069 DAC array, and an XMOS XU316 USB interface that supports master-grade PCM 768 kHz/DSD512 decoding and full MQA unfolding. Connectivity has been comprehensively upgraded, featuring multi- machine recording monitoring, 3.5 mm single-ended, and 4.4 mm balanced analog inputs. The durable exterior is crafted from sand- blasted aerospace aluminum and Kunlun glass. Independent dual USB-C ports support charging while listening, with an intelligent battery system ensuring stable, long-lasting power.

Portability Maximized

Built for professional, multi-scenario use, the SIGMA Pro is about the same size as an iPhone 16 Pro Max (155.7 × 85 mm) yet weighs only 330.8 g, delivering desktop-grade performance in a feather-light package.

Designed to impress

Guided by the Bauhaus philosophy of "less is more," SIGMA Pro is a testament to classic industrial design. Its clean lines and pure geometric form remove all unnecessary ornamentation, ensuring every detail serves a precise functional purpose.

Inside, the beautiful components are on full display. The meticulously arranged circuits and gleaming chips create a mechanical work of art, fusing vintage charm with modern tech. More than just a device, SIGMA Pro is a statement piece that instantly commands attention wherever it's placed.

Hardcore Performance

SIGMA Pro features a more powerful, fully discrete and balanced current mode amplifier, delivering significantly increased output power and current. This allows it to effortlessly drive demanding high-impedance headphones for a full, dynamic sound, while also precisely controlling low-impedance IEMs for pure, detailed audio. The four sets of patented amplifiers elegantly resolve the conflict between size, power, and audio performance.

ESS Flagship Stereo DAC ES9069 Dual Mono Configuration + TTA (Three-Tier Architecture) Decoding Framework

To achieve decoding performance beyond customer expectations, the SIGMA Pro utilizes ESS's flagship stereo DAC chips, two ES9069 in a dual mono configuration, combined with the TTA three-level decoding architecture developed by Questyle engineers, delivering performance fully on par with desktop devices.

Dual USB-C Ports

Sigma Pro supports dual USB-C ports, separating data transmission and charging. 

Designed for Music Professionals and Audiophiles

The rich interfaces and powerful performance allow Sigma Pro to connect to traditional Hi-Fi equipment, instantly reviving classic devices. It also allows recording and production professionals to connect to monitoring speakers an mixers anytime to start monitoring work on the spot. 

Qualcomm Snapdragon Sound and Sony LDAC Certified

The Sigma Pro is equipped with Qualcomm's latest gen of Snapdragon Sound technology, Bluetooth version 5.4, and has been fully certified by Qualcomm Sound and Sony LDAC. 

Apple MFi Certified

Sigma Pro is officially Apple MFi certified, ensuring seamless support for the iPhone/iPad and the wider Apple ecosystem. This prevents potential damage caused by uncertified USB accessories. 

Specifications
  • Patented Current Mode Amplifier with a fully discrete, fully balanced design delivers professional-grade performance from a portable form factor. Balances powerful drive with low power consumption, featuring a peak output power >5V and load distortion as low as 0.0002%.
  • Equipped with dual ESS9069 DAC chips and TTA three-tier decoding architecture, breaking the limits of portable devices by offering top-tier decoding performance up to PCM768kHz and DSD512. Mobile devices can now achieve desktop-level resolution.
  • Apple MFi certified, ensuring perfect compatibility with iPhone/iPad and seamless integration within the Apple ecosystem.
  • Dual certified by Qualcomm Snapdragon Sound and Sony LDAC, enabling wireless enjoyment of lossless audio.
  •  3.5mm, 4.4mm, & 6.35mm headphone output jacks, combined with manual gain control, allow easy switching to your personalized listening mode.
  •  Built-in 4300mAh high-capacity battery provides up to 12 hours of single-charge battery life. The dual USB-C port design supports charging while listening, eliminating battery anxiety.
Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 80294696157

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R
RalphBP
Chelsea, US
★★★★★ 5
A great read for those who want in depth knowledge about MS Active Directory & related services
Format: Paperback
Reviewer: 20 yrs training and consulting experience with Windows Server, Exchange Server, Active Directory, all major hypervisors, and cloud services. Active Directory along with all the related services and features are complex and many faceted topics. Books showing step by step examples are easy to come by, although not very useful since there’s plenty of Microsoft online help with the same info. What’s more important is to understand the features and related services and how to use them properly and securely. This book covers in great detail Active Directory and the related services and features. There’s also plenty of information and expertise from a security perspective. With the move to cloud services and more employees are working from home there’s a whole new level of security issues to contend with. This book contains lots of in-depth explanations that allow you to understand why certain features and services exist and how to use them. This extra depth and the author’s experience is what makes this book special. I would recommend this book for IT Professionals that already have some AD knowledge and experience. My only qualification is that I occasionally found some of the explanations confusing even after reading them over a several times. I would highly recommend this book for those who wish to understand, configure and design an AD infrastructure along with associated services including OU design, group policy, object management delegation, ADFS, Certificate Services, etc. Although the book is not about Azure AD it does cover some aspects including integrating with on-prem AD.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2022
B
Brian
Grantham, US
★★★★★ 5
Detailed coverage of Active Directory
Format: Kindle
I spent several years very close to active directory but haven’t followed developments in recent years. I was interested in this book as a refresher on what’s new in the last 8-10 years – and it did not disappoint. The chapter on Advanced AD Management with PowerShell does a great job providing some background, setting the stage for why we’d want to know this, and providing some brief descriptions of various cmdlets that might be needed. My last experience with PowerShell/Active Directory required the Quest module, so seeing these native cmdlets is a nice change. The chapter on AD FS is very detailed, providing a history of the functionality, deployment topologies and considerations, as well as details on configuring the required components. This is a topic I was not familiar with before seeing this book, and it did a good job bringing me up to speed on the feature. I have not made it all the way through this book, but the sections I have completed are very good. If you are looking for a thorough reference guide on the current state of Active Directory, you should check out this book.
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Reviewed in the United States on December 8, 2021
D
D. Dieterle
Omaha, US
★★★★★ 5
The book for designing and deploying Active Directory in your Organization
Format: Paperback
If you purchased an earlier release of this book and was wondering if this one is worth getting, the answer is yes!! The biggest change is this edition thoroughly covers the latest and greatest, Windows Server 2022. It walks through security issues, the differences between this and previous versions of Windows Server and how to design and deploy a functional and secure Server 2022 Active Directory. I enjoyed reading through this book and highly recommend it!
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Reviewed in the United States on February 4, 2022
A
Anthony Bartolo
Grantham, US
★★★★★ 5
Comprehensive guide for IT Professionals interested in increasing their Active Directory Knowledge
Format: Paperback
Dishan Francis is a seasoned IT expert and six-time Microsoft MVP who has offered innumerable lessons learned through his experiences using Microsoft services. The Third Edition of Mastering Active Directory provides simple explanations of ideas accompanied by appropriate graphics to help the reader feel at ease while learning new concepts.
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Reviewed in the United States on January 31, 2022
G
Verified Purchase
Gabriela
Fort Morgan, US
★★★★★ 5
Realistic book of el Camino de Santiago
Format: Paperback
This is the most realistic and informative book I've read about el Camino de Santiago, (and I've read no less than 10 in my preparation to walk el Camino). It is beautifully written, inspirational, humble and encouraging. The reality of the albergues or refugios hit me, so I decided to book in private albergues or pensiones in advance. Thank you Joyce for opening our eyes about the hard parts of the Camino, but also of all the beauty and the transformative experience. I hope to savor some of what you and Tome did (minus the albergues), and to learn to appreciate every little thing that we take it for granted. Beautiful book! A must read for all who wants to walk The Way.
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Reviewed in the United States on April 30, 2025

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