QUDELIX

Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD, AAC (Dual ES9219 3.5mm Unbalanced & 2.5mm Balanced Output)

Name: Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD, AAC (Dual ES9219 3.5mm Unbalanced & 2.5mm Balanced Output)
Brand: QUDELIX
SKU: B088F7C976
Price: 99.00 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-15

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$99.00

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*Price sourced from Amazon.com. Price and availability subject to change.

Bottom line: The Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD, AAC (Dual ES9219 3.5mm Unbalanced & 2.5mm Balanced Output) is a specs-and-price decision rather than a crowd-consensus one in the audio & midi category, priced around $99.00. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

The Qudelix-5K packs dual ES9219 DACs into a 25g clip-on body that turns any wired headphone into a high-resolution wireless setup. Pair it over LDAC, aptX Adaptive, aptX HD, or AAC via the Qualcomm QCC5124 chipset, or plug it into a computer and run it as a 96kHz/24-bit USB DAC. Two outputs cover both ends of your collection: a 3.5mm unbalanced jack delivering 2V RMS and 80mW, and a 2.5mm balanced jack pushing 4V RMS and 240mW for harder-to-drive planars and multi-driver IEMs. The embedded double-precision parametric equalizer is the feature owners cite most, letting you shape response…

SpecPicks Verdict

SpecPicks scored Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the audio & midi category. QUDELIX's audio & midi lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for audio & midi of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Frequently Asked Questions

Can I use the Qudelix-5K with my Bluetooth headphones?

No. The Qudelix-5K is a Bluetooth receiver, not a transmitter, so it only works with wired headphones or earphones plugged into its 3.5mm or 2.5mm jack.

How long does the battery last?

The 500mAh Li-Po battery is rated for 6 to 20 hours of streaming. Expect the low end on LDAC through the 240mW balanced output and the high end on AAC through the 80mW 3.5mm jack.

Does it work as a USB DAC for my PC or laptop?

Yes. It operates as a USB DAC at 96kHz/24-bit, so you can run it wired to a computer instead of over Bluetooth and keep the same EQ settings.

Will it drive planar magnetic headphones?

The 2.5mm balanced output supplies 4V RMS and 240mW, which handles many planars and multi-driver IEMs. The 3.5mm unbalanced output is lower at 2V RMS and 80mW.

Which Bluetooth codecs does it support?

The Qualcomm QCC5124 chipset supports LDAC, aptX Adaptive, aptX HD and AAC, along with HFP, HSP, A2DP and AVRCP profiles.

Pros & Cons

Pros

✓ Dual ES9219 HiFi DAC 2.5mm Balanced (4V RMS) 3.5mm Unbalanced (2V RMS)
✓ Backed by QUDELIX's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

Dual ES9219 HiFi DAC 2.5mm Balanced (4V RMS) 3.5mm Unbalanced (2V RMS)
Qualcomm QCC5124 Bluetooth Chipset HFP / HSP / A2DP / AVRCP LDAC / aptX Adaptive / aptX HD / AAC
Bluetooth and USB DAC 96KHz/24bit with embedded double-precision equalizer
500mA Li-Po Battery / 6~20 hours streaming
Plastic Body (Black) with anti-scratch UV Coating / Aluminium Clip (Dark Gray) / 52.8(H) x 26.7(W) x 15.6(D) mm (including Clip) / 25g
2.5mm Balanced 240mWatt / 3.5mm Unbalanced 80mWatt

Full Specifications

Brand	QUDELIX
Model	Qudelix-5K
Weight	25g
Interface	USB
Unit Count	1 Count
Part Number	Qudelix-5K
Connectivity	Bluetooth, USB
Material Type	Plastic
Mounting Type	Clip On,Plug Mount
Interface Type	USB
Item Type Name	DAC AMP
Connection Type	Wired
Audio Output Mode	Stereo, Balanced
Compatible Devices	Android, Windows, iPhone, macOS
Number of Channels	2
Warranty Description	1 year manufacturer
Item Dimensions L x W	2.08"L x 1.05"W
Smart Home Compatibility	Not Smart Home Compatible

Ready to buy?

Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD, AAC (Dual ES9219 3.5mm Unbalanced & 2.5mm Balanced Output) is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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*Price sourced from Amazon.com. Price and availability subject to change.