Subj : Our favorite Bluetooth dongle maker just unveiled the hi-res DAC
To   : All
From : TechnologyDaily
Date : Wed Dec 10 2025 11:45:07

Our favorite Bluetooth dongle maker just unveiled the hi-res DAC of our dreams

Date:
Wed, 10 Dec 2025 11:31:02 +0000

Description:
The Questyle Sigma Pro is a powerful portable and desktop DAC, headphone amp 
and audio recorder

FULL STORY
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headphone support plus aptX lossless and LDAC Can record analog sources to 
external storage and PCs $899 (so around 675 or AU$1,352) 

Questyle is the firm behind the brilliant little QCC Dongle Pro , which is a 
superb audio upgrade for smartphones: it's a tiny transmitter that adds all 
the key hi-res and lossless codecs to phones, tablets, gaming handhelds and 
more. And now Questyle has launched a bigger and much more powerful device, 
the Sigma Pro portable DAC and headphone amp. 

The Sigma Pro is a new version of the firm's flagship DAC, and it promises 
desktop-class specs and sound quality from the smartphone-sized device. It 
may be small but it packs four sets of amplifier stages, a dual-mono ESS 
ES9069 DAC array and a USB interface with support for PCM 768kHz/DSD512 and 
full MQA unfolding. (Image credit: Questyle) Questyle Sigma Pro: key features 
and pricing 

The outside of the Sigma Pro is made from sandblasted aluminium and Kunlun 
glass, and in a nice touch the majority of the front is transparent so you 
can see its electronic innards. 

The Sigma Pro features dual USB-C ports that enable you to recharge the Sigma 
Pro while listening to it, and you can expect up to 12 hours of playback in 
battery mode. There are 3.5mm single-ended, 6.35mm and 4.4mm balanced 
outputs, SPDIF and optical digital inputs and both 3.5mm and 4.4mm balanced 
stereo inputs. 

Bluetooth is 5.4 with LE Audio, Snapdragon Sound, LDAC, aptX Adaptive and 
aptX HD lossless audio at up to 24-bit/96kHz quality. Specs to compete with 
the best headphones DACs we've tested then? You betcha. 

The discrete, fully balanced current mode amplifier has a peak output power 
of 8W, and Questyle promises ultra-low loaded distortion and "exceptional" 
noise floor control. 

One of the interesting features of the Sigma Pro is its recording support. 
You can connect its 3.5mm or 4.4mm inputs to analogue audio equipment and 
then turn that audio into a digital file for external storage or to a PC or 
Mac. 

The Sigma Pro has a recommended selling price of $899 (about 675 / AU$1,351) 
and it's available in the US directly from Questyle, from hi-fi retailers and 
from Amazon. There's also a more affordable model with a different DAC setup, 
the $599 Sigma. 

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Link to news story:
https://www.techradar.com/audio/our-favorite-bluetooth-dongle-maker-just-unvei
led-the-hi-res-dac-of-our-dreams


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