1 7

Questyle Sigma Bluetooth Headphone Amplifier USB C Rechargeable DAC Amps | [MFi Certified] Portable Bluetooth 5.4 USB Amps with 3.5mm and 4.4mm Dual Outputs PCM768/DSD512 for Smartphones/PC/Laptop

Questyle Sigma Bluetooth Headphone Amplifier USB C Rechargeable DAC Amps | [MFi Certified] Portable Bluetooth 5.4 USB Amps with 3.5mm and 4.4mm Dual Outputs PCM768/DSD512 for Smartphones/PC/Laptop

$994.34 USD
$994.34 USD
Sale Sold out
Taxes included.

About this item

  • 【Portable Size Desktop Performance】：The Sigma was primarily designed to create a Hi-Fi system for smartphones and laptops, aiming to achieve performance comparable to top-tier desktop setups, within a portable size.
  • 【MFi Certified】: SIGMA is officially MFi certified. This certification signifies flawless support for iPhone/iPad and Mac, meeting the stringent requirements for powerconsumption and compatibility of external devices, whileeliminating risks of damage from uncertified USB accessories.
  • 【TTA Signal Processing Architecture】:To exceed customer expectations for decoding performance, SIGMA uses the highly acclaimed AK4493 DAC from AKM and is engineered with Questyle’s TTA architecture to deliver desktop-class audio performance.
  • 【Patented Current Mode Amplifier Fully Discrete, Fully Balanced Architecture】: SIGMA incorporates four sets of patented, fully discrete, fully balanced CMA headphone/output amplifiers.Balancing size, power consumption, and sonic performance is the core challenge in portable audio devices.Questyle’s patented Current Mode Amplifier achieves both powerful drive capability and refined sonic character within a portable size.The fully discrete CMA delivers peak power up to >5W, peak current up to 3A, enabling exceptional dynamic drive capability.
  • 【Comprehensive Compatibility with Mobile & PC】: SIGMA supports high-speed USB connections with smartphones and PCs, as well as lossless Bluetooth audio. Output modes can be switched between headphone amplifier and line-out for professional monitors or Hi-Fi systems.It can also enhance PC audio quality in settings like live concerts.It full compatibility with iOS, HarmonyOS, and Android 5.1+.For PC, it supports Windows 10 1803+ (driverless) and macOS.
  • 【Certified by Qualcomm Snapdragon Sound and Sony LDAC】: SIGMA incorporates Qualcomm's latest-generation Snapdragon Sound technology (Bluetooth version 5.4) and is fully certified for both Snapdragon Sound and Sony LDAC.Snapdragon Sound utilizes leading Qualcomm aptX Adaptive technology, supporting aptX HD lossless audio, delivering CD-quality 16-bit 44.1kHz lossless and 24-bit 48kHz/96kHz high-resolution audio over Bluetooth to wireless earbuds and headphones.

Overview

  • Brand: Questyle
  • Interface Type: USB, Bluetooth
  • Material: Plastic
  • Audio Output Mode: headphone amplifier, line-out
  • Compatible Devices: Smartphones, Laptops, Desktops, Tablets, Cellphones

Low stock: 10 left

View full details

Reviews

  • ⭐⭐⭐⭐⭐

    Olivia Bennett — Seattle, Washington

    Listenora has a practical selection of audio accessories that made it easy to find what I needed. The product information was clear, ordering was simple, and everything fit naturally into my everyday listening setup.

  • ⭐⭐⭐⭐⭐

    Ethan Parker — Austin, Texas

    I liked how easy it was to browse the different audio categories. The accessories I ordered were straightforward to use and helped make my desk setup feel cleaner, more organized, and more convenient.

  • ⭐⭐⭐⭐⭐

    Samantha Reed — Denver, Colorado

    The item arrived as expected and worked well with my setup. I especially appreciated the clear product details, which helped me check the connection type and compatibility before placing my order.

  • ⭐⭐⭐⭐⭐

    Michael Turner — Portland, Oregon

    Listenora offers useful audio products without making the shopping process feel complicated. My order was easy to track, the accessories were neatly packaged, and I would consider shopping here again for future audio needs.

FAQ

What types of products does Listenora sell?

Listenora offers everyday audio accessories for work, gaming, travel, fitness, and personal listening. Our selection includes headphones, earbuds, microphones, speakers, audio cables, adapters, stands, protective cases, replacement parts, and cleaning accessories.

How can I check whether a product is compatible with my device?

Please review the connector type, supported devices, dimensions, operating-system requirements, and compatibility information shown on the product page. For additional assistance, contact us with the exact brand and model number of your device before ordering.

How much does shipping cost?

Unless a different rate or promotion is displayed during checkout, we charge a flat shipping fee of $6.90 per order. International duties, taxes, customs charges, and other third-party fees are not included unless expressly stated.

How long does order processing take?

Orders are generally processed within 1–3 business days after payment is confirmed. Processing may take up to 5 business days during holidays, promotional events, high-demand periods, or inventory reviews.

How long will delivery take?

Estimated delivery is generally 5–10 business days within the United States and 10–20 business days for eligible international destinations after shipment. Delivery times are estimates and may be affected by carriers, customs, weather, address issues, or other circumstances.

How can I track my order?

Once your order has shipped, tracking information will generally be sent to the email address used during checkout. Tracking may take 2–5 business days after dispatch to display its first meaningful update.

Can I change or cancel my order?

Please contact us as soon as possible after placing your order. We will make reasonable efforts to assist, but changes or cancellations cannot be guaranteed once processing, fulfillment, or shipment has started.

What is your return policy?

Eligible unused products may generally be returned within 30 days after confirmed delivery. Products must meet our return conditions and receive authorization before being shipped back. Certain opened or used hygiene-sensitive audio products may not qualify for change-of-mind returns.

What should I do if my item arrives damaged, defective, or incorrect?

Contact us promptly with your order number, a description of the issue, and clear photographs or videos of the product, packaging, and shipping label. Please retain all original packaging and accessories until the issue has been reviewed.

How can I contact Listenora customer support?

Email us at gtrefasnhuim@gmail.com. Please include your full name, order number, and a clear description of your question. Most inquiries are reviewed within 1–3 business days.

Made for Everyday Listening

At Listenora, we believe audio accessories should do more than simply connect a device. They should make everyday listening feel easier, more comfortable, and better organized.

Every routine has different audio needs. Some moments call for clear communication during work or gaming, while others require compact, dependable accessories for travel, exercise, or relaxed listening. That is why Listenora focuses on practical audio products designed to support real everyday situations without making your setup feel complicated.

Our collection is selected with usability in mind — from headphones, earbuds, microphones, and speakers to cables, adapters, stands, protective cases, replacement parts, and cleaning accessories. Each product is chosen to help improve comfort, connectivity, organization, and convenience across a wide range of audio setups.

Listenora is made for people who value useful products, simple connections, and a more enjoyable listening experience. Whether you are preparing for a meeting, settling into a gaming session, heading out for a workout, or organizing your audio equipment, we are here to help make everyday sound work better for you.

Explore Listenora

Blog posts

View all
  • Memory Foam vs. Silicone Ear Tips: Which Is Better for Noise Isolation at a Busy Office?

    Memory Foam vs. Silicone Ear Tips: Which Is Bet...

    Discover whether memory foam or silicone ear tips provide better noise isolation for busy offices. Learn how fit, comfort, and ear tip material affect ANC performance and everyday listening.

    Memory Foam vs. Silicone Ear Tips: Which Is Bet...

    Discover whether memory foam or silicone ear tips provide better noise isolation for busy offices. Learn how fit, comfort, and ear tip material affect ANC performance and everyday listening.

  • How to Stop Wireless Earbuds From Falling Out During Intense Workouts: A Complete Ear Tip Guide

    How to Stop Wireless Earbuds From Falling Out D...

    Keep your wireless earbuds secure during every workout by choosing the right ear tips. Learn how size, material, and proper fitting techniques improve comfort, stability, and sound quality for fitness...

    How to Stop Wireless Earbuds From Falling Out D...

    Keep your wireless earbuds secure during every workout by choosing the right ear tips. Learn how size, material, and proper fitting techniques improve comfort, stability, and sound quality for fitness...

  • Top 5 Mistakes People Make When Choosing Ear Tips for Better Noise Isolation

    Top 5 Mistakes People Make When Choosing Ear Ti...

    Discover the five most common ear tip mistakes that reduce comfort, sound quality, and noise isolation. Learn how choosing the right size and material can dramatically improve your listening experience...

    Top 5 Mistakes People Make When Choosing Ear Ti...

    Discover the five most common ear tip mistakes that reduce comfort, sound quality, and noise isolation. Learn how choosing the right size and material can dramatically improve your listening experience...

1 3
View all