Pure Power. King of Detail. Redefining your audio experience with advanced GaN technology.
The Questyle SIGMA Portable DAC Headphone Amplifier utilizes cutting-edge Gallium Nitride (GaN) technology and AKM’s AK4493 DAC chip to provide extraordinary audio quality and power in a compact, portable form. The Current-Mode amplifier, with its fully discrete, fully balanced design, ensures powerful amplification with minimal distortion, offering an immersive listening experience. Combined with its advanced Bluetooth 5.4 support and high-capacity battery, SIGMA redefines what’s possible in portable high-fidelity sound.
| Parameter | Details |
|---|---|
| DAC Chip | AKM AK4493 |
| Power Transistors | Infineon Gallium Nitride (GaN) |
| Current-Mode Amplifier | Fully discrete, fully balanced with peak power of 5W and 3A current |
| Bluetooth | Bluetooth 5.4, Qualcomm Snapdragon Sound, aptX Adaptive, aptX HD, LDAC |
| Battery | 4300mAh Lithium battery, up to 12 hours battery life |
| USB Charging | Dual USB ports, 2A charging current, USB-C |
| USB Playback Support | PCM 768kHz/32bit, DSD512, DSD DoP |
| Input / Output | 3.5mm & 4.4mm headphone outputs, USB input |
| Size | 158 x 64 x 28 mm |
| Weight | 400g |
Note: Performance may vary depending on the connected devices, audio formats, and settings. Compatibility with smartphones, tablets, and PCs is guaranteed for optimal performance.
Thank you for shopping with thehificat.com. Please read our shipping policy carefully before placing your order.
In accordance with the latest EU Council regulations and customs guidelines, a new tariff system will take effect across all 27 EU member states (Austria, Belgium, Bulgaria, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden) starting 1 July 2026.
Key Policy Change: The EU is abolishing the previous duty exemption for low-value parcels. From 1 July 2026, all goods declared through IOSS with a value not exceeding €150 will be subject to a fixed customs duty of €3 per HS tariff code category. All goods entering the EU — regardless of value — will now be subject to customs duties.
To ensure smooth customs clearance and transparent cost management, a handling surcharge of USD $5 has been applied to all standard shipments to EU countries (orders under $500). For orders over USD $500, expedited shipping remains complimentary.
| Countries | Estimated Delivery | Shipping Cost | Courier | Order Amount |
|---|---|---|---|---|
| Hong Kong SAR, Taiwan, Macao SAR | 3–5 working days | Free | Standard Shipping / SF Express | ALL |
| Singapore, Japan, South Korea, Malaysia, Thailand, Vietnam, Philippines, Cambodia, Laos, Myanmar, Brunei, Indonesia, Nepal | 5–15 working days | Free | Standard Shipping / Yunexpress | ALL |
| Saudi Arabia, United Arab Emirates | 5–15 working days | Free | Standard Shipping / Yunexpress | ALL |
| New Zealand, Australia | 10–15 working days | Free | Standard Shipping / Yunexpress | ALL |
| Countries | Estimated Delivery | Shipping Cost | Courier | Order Amount |
|---|---|---|---|---|
| United Kingdom | 5–10 working days | Free | Standard Shipping / Yunexpress | ALL |
| Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland,Germany, France, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Poland, Slovakia, Slovenia, Spain, Sweden, Switzerland | 10–15 working days | $5.00 USD | Standard Shipping / Yunexpress | $0–$500 |
| Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland,Germany, France, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Poland, Slovakia, Slovenia, Spain, Sweden, Switzerland | 5-10 working days | Free | Express Shipping / dhl | $500+ |
| 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, Norway, Turkey | 10–15 working days | Free | Standard Shipping / Yunexpress | ALL |
| Countries | Estimated Delivery | Shipping Cost | Courier | Order Amount |
|---|---|---|---|---|
| United States, Canada | 7–15 working days | $10.00 USD | Standard Shipping | ALL |
| Mexico | 7–15 working days | Free | Standard Shipping | ALL |
| Brazil, Peru, Colombia | 7–20 working days | Free | Standard Shipping / Yunexpress | ALL |
| Countries | Estimated Delivery | Shipping Cost | Courier | Order Amount |
|---|---|---|---|---|
| India, Russia, Israel, Qatar, South Africa, Morocco, Kenya, Nigeria, Ghana, Rwanda, Tanzania, Uganda, Angola | 7–20 working days | Free | Standard Shipping / Yunexpress | ALL |
| Other countries (Standard) | 10–20 working days | $30.00 USD | Standard Shipping / Yunexpress | ALL |
| Other countries (Express) | 5–7 working days | $50.00 USD | DHL Express | ALL |
| Coverage | Estimated Delivery | Shipping Cost | Order Amount |
|---|---|---|---|
| Most countries | 3–5 working days | $30.00–$50.00 USD | $0–$500 |
| Most countries | 3–5 working days | Free | $500+ |
⚠️ Note: Expedited shipping is on DAP (Delivered At Place) terms. Import duties and taxes are the responsibility of the recipient.
Standard Shipping (DDP): We ship on a Delivered Duty Paid (DDP) basis for most destinations. We work with a customs clearance agent to handle all import procedures — you will not be charged any additional fees upon delivery.
Expedited Shipping (DAP): If you select DHL Express, FedEx, or UPS, shipments are on a Delivered At Place (DAP) basis. Import duties and taxes are the responsibility of the recipient and will be collected upon delivery.
EU Customers (from 1 July 2026): A $5 USD surcharge applies to standard shipments to EU countries on orders under $500, to cover new mandatory customs processing fees.
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📧 Email: support@thehificat.com
📞 Tel: +8619270016096
🏢 Address: Hoover Industrial Building, Flat 7, Blk B, 23/F, Kwai Cheong Road, New Territories, Hong Kong SAR
(Note: This is not the return address. Please contact us for return instructions.)
