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Questyle

Questyle SIGMA Portable DAC Amplifier

Questyle SIGMA Portable DAC Amplifier

  • Authorized Retailer
  • Free US Shipping $49+
  • 1-Year Warranty
  • 45-Day Returns
$595.99 USD
$595.99 USD
Sale Sold out
Shipping calculated at checkout.
Title

The Questyle SIGMA is a portable headphone amplifier with DAC on board, handling PCM up to 768kHz and DSD512, with Bluetooth 5.4 and a 4300mAh battery. That battery is the number worth pausing on — it means the SIGMA runs on its own supply rather than draining the phone it's attached to, which is the quiet failure of most dongle DACs.

Bluetooth 5.4 makes it a wireless receiver too, so it can sit between a phone in your pocket and the headphones on your head with no cable running between them. Good match for demanding IEMs and efficient full-size headphones when you want more than a dongle but aren't carrying a desktop stack. Pairs naturally with a phone-first listening setup.

  • PCM768 and DSD512 support
  • Bluetooth 5.4
  • 4300mAh internal battery
  • Authorized Questyle retailer — 45-day returns, 1-year warranty
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Good to know

Frequently asked questions

Is this unit genuine?

Yes. TonePier is an authorized retailer — every unit comes from the brand or its official distributor, carries a valid serial number and is covered by the full manufacturer warranty.

How long does shipping take?

SKUs stocked in our US warehouse ship within 1–2 business days. Items shipped direct from our China hub typically arrive in 8–15 days with full tracking. The product page tells you which applies before you order.

What if it isn't for me?

You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.