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

I really enjoy the Qudelix 5K both on the go and at home when plugged in. I use it with my Punch Audio Martilo IEMs on a Tripowin 2.5mm balanced cable, and my Hifiman Ananda Stealth V3 using a Meze Audio 2.5mm to 3.5 mono silver-plated copper cable. Both pairings work beautifully in wireless mode at 2 VRMS. I don’t really take the Anandas outside, but around the house the Qudelix makes them surprisingly versatile and easy to use without being tied to a desk setup. The Martilos are my travel set — great for store runs and general out-and-about use. Wired mode is where things really step up. Listening to lossless audio through USB with both headphones sounds wonderful. Some people say you can’t really hear the difference between lossless and Bluetooth, but in my experience you can — especially in clarity and separation. Bluetooth still sounds very good, but wired lossless has that extra clean edge. When it comes to PEQ, this is where the Qudelix 5K really shines. The parametric EQ system is one of the best features. You can build your own custom PEQ profiles or load presets from well-known audiophile sources. It makes it easy to fine-tune both the Martilos and the Anandas exactly how you want them. Battery life has been excellent in my use. With the IEMs I get over 10 hours consistently. With the Anandas it’s shorter — usually around 5–8 hours — but I solve that by using a low-charge battery pack (important — low charge mode). With that setup I can stretch runtime to around 14 hours with the Anandas and close to 24 hours with the Martilos. For anyone who needs something portable but still powerful and flexible, the Qudelix 5K delivers. The fact that all of this comes in such a small device makes it absolutely worth it.

This is my first DAC/amp. I bought it mostly based on the hype and positive reviews, and because I wanted something portable with a lot of flexibility. Overall this is an excellent DAC/amp for the price with a really strong feature set. Bluetooth supports most of the important codecs, and the balanced 2.5mm output is a big plus for something this small. In 2025 I do kind of wish it used 4.4mm instead, but it’s not a deal breaker. Sound quality is clean and has more than enough power for the headphones and IEMs I’ve tried. It also has battery passthrough and lets you set safe charging limits, which is a nice touch if you care about battery longevity. The app is one of the best parts. There are a ton of options, it’s actively updated, and it feels like the developers actually care about supporting the product. Build quality seems fine for daily use, but it’s basically a chunk of plastic with a clip, nothing fancy. The buttons take some getting used to, and there’s a lot I still haven’t messed with yet. This probably isn’t the device for someone who just wants super simple plug-and-play. But if you want flexibility and control in a small portable DAC/amp, it’s hard to beat for the price.

The Qudelix 5K truly is an awesome product. Don't know if it's exactly worth the price but it certainly is excellent. I've been using it paired with Truthear Hexa IEMs and with an iPhone/Mac/Windows PC over Bluetooth and USB (for each device). It's a great product effectively delivering a GREAT sound quality. I can't hear any difference with my IEMs used directly with the cable. It's awesome for this. With such IEMs, power will never be a problem as you'll completely annihilate your ears before you reach half the full volume of this thing. The volume automatically syncs with your device's so that it always delivers the best audio quality no matter the volume set on the source device (you don't have to worry about absolute volume on Bluetooth). The app is incredibly full of options. There's settings for EVERYTHING. I never had any lag when changing the settings, they're well saved, it's responding lightning fast, you can set an EQ with up to 20 bands... I can't say much about durability yet, but it's very small. I could fit two of these products inside a single hand. The clip is really good so I can attach it to my jeans, vest, or anything really. It's light enough that if it ever falls, the cable of the IEMs will retain it from falling. Oh and also, you can connect (simultaneously) up to 2 devices over Bluetooth as well as an additional device over USB (all 3 at the same time). It switches very intelligently and quickly over these 3 devices. The integrated microphone isn't very good, but I'm pretty sure no one will buy this product for that. If needed, you can plug in an external mic to use with it. It works flawlessly and is also available to set up within the app. If you're wondering whether you should buy this product, just buy it. It's EXCELLENT.

I used the QUDELIX 5K for a few months, sold it to switch to similar Bluetooth devices only to buy it again. The 5K is superior, and here is why: • Exceptional proprietary app, with instantaneous response time, undoubtedly the best on the market. Extensive EQ capabilities and customisation, making the devise a miniaturised professional amp. • Elegant and discrete design, with customisable light so you don’t feel festively decorated all year round. • Despite the minute design, the 5K has great control buttons, easy to locate and operate. • Truly integrated clip, which does not add bulk to the slick design. • Discrete battery life, 8hrs. • The crisp and balanced sound of the ES9219C DAC chipset. • Seamless automatic switching from Bluetooth amp to Dongle amp function (many other similar DAC amps require manual switching). • Finally, size and weight. This is the smallest and lightest Bluetooth DAC amp available. Mine is paired with IE200s and, clipped to the original Sennheiser cable, or 2.5 balanced cables by OpenHearth wrapped around the neck, is virtually impossible to feel. Obviously, a personal consideration but, based on my experience, the QUDELIX 5K is unrivalled in the space of ultraportable DAC AMPs.

The price-to-performance ratio is insane. I have several other products to compare with, such as the Chord Mojo 2, Chord Hugo 2, Audioquest Dragonfly Cobalt, Red, and more. The Qudelix 5K doesn’t quite keep up with Chord’s products, but then again, they’re not even in the same price league… That said, it’s clearly better than most of the gear I test it against. The versatility and sound quality are superb!!! I primarily use it as a headphone amp/DAC for the PS5, connected via the PS5’s front USB-C port. The headphones I most often use for gaming are the Sennheiser HD560S, and they sound really good together. I’ve also tried connecting it through the USB-C port on my iPad. Works flawlessly and even drives my Sennheiser HD600 impressively. This is through the unbalanced 3.5 mm output… I haven’t tried the balanced 2.5 mm output yet, but that would be really interesting.

Deze bluetooth DAC overtreft mijn verwachtingen: heel detailrijke klank, mooie textuur en timbre. Ik gebruik hem voornamelijk met een Queen Of Audio Vesper IEM en een Sennheiser/Drop HD58X hoofdtelefoon. Voor geen van beiden heb ik EQ nodig met de DAC. Zelfs een 30 jaar oude Sennheiser HD480 II klinkt, met slechts een beetje lift in de lage tonen, beter dan ooit tevoren. Het belangrijkste verkoopsargument van de DAC is de EQ, maar die is voor mij minder belangrijk, de instellingen in de app zijn zeker zo interessant. Er zijn enorm veel mogelijkheden. Een raad voor nieuwe gebruikers: doorloop aandachtig alle instellingen. Zoniet zal je enkele cruciale functies over het hoofd zien, zoals de 2 volumeregelingen in cascade. Uiteraard zijn er beperkingen: een hoog-ohmige hoofdtelefoon zoals de Sennheiser HD250II (300 ohm) is weliswaar nog net aanstuurbaar, maar daarvoor is de DAC niet gemaakt en dan moet hij echt "zwoegen". De bediening is een beetje wennen omdat de knoppen geen labels hebben, maar daar is een oplossing voor: de Qudelix 5K sticker by Sproketz.

so happy to be able to keep using my Shure earphones on the go when I was forced to upgrade away from my 3.5mm jack equipped phone. The sound is absolutely just as good as when wired!

The Qudelix - 5K is really a wonderful small HIFI component, which I have now been using for one year. Its extremely compact and light weight, so one can easily clip it to a pair of open back headphones, the range of codecs supported and the stability of the connection are excellent, the companion app offers many settings and customization option, the EQ tool is great and easy to use, one can also use it as a desk dac/amp while preventing the (over)charging of the battery, etc, etc... Everything that Qudelix and other reviewers say about that product and its qualities and functions is true. Honestly, I can't think of anything negative to say about it. The best audio equipment purchase I have made in years !