Qudelix-T71 USB DAC Headphone AMP (BAL 2.5&4.4mm 8VRMS, UNBAL 3.5mm 4VRMS)

Love this dac/amp. It replaces a Topping desktop headphone amp and I love the portability it offers. It has both 4.4mm and 2.5mm balanced inputs and parametric EQ if you want to tweak the sound further. Wonderful sound quality with plenty of power for most headphones (I'm using it to drive HiFiMAN Ananda Stealths and Meze 99 Neos).

I’m new to the whole “audiophile” world. I decided to take a leap of faith bcz this device is not cheap. Now im in love with it. Makes my music so much more crisp and powerful. It has its own equalizer but you have to use the Internet Browser and install an extension. This extension has a huge amount of customizations that i don’t even know where to start. I’m using it will my Sennheiser 650 headphones. They make such a perfect team. The battery last quite a long time. The only downside is that it does not have Bluetooth but it’s ok because using the cable you are getting the full and clear music straight to your ears without any loss of quality.

I came from a Qudelix 5k. Honestly I was hesitant to "upgrade" as there is no Bluetooth on this model, and I know the 5k has an acoustically transparent DAC. Its still 5 stars. The multichannel is incredible. I love using my headphones for movies now. I do have problems with the browser extension connecting. I hope they work on this in the future.

Be careful i paired it with the iem and the iem stopped working before year had passed

The T71 is a very capable DAP. I'll quickly cover some of the specs. Can do 384kHz/32bit, but on my Galaxy S25 Ultra, I was able to get 192kHz/32bit when streaming from Amazon Music HD...a limitation of Amazon Music and not the device. This has four ESS 9219 DACs, each pair of two powered by its own Amp. The 9219 DAC chip has been around for about 5 years, but it still holds its own. It has an internal battery, so you can use this with your phone without draining the phone's battery. It supports both 4.4 and 2.5 balanced connections, as well as 3.5 unbalanced. First, I had to install an applet/extension on my Edge/Chrome browser to update the firmware. After updating the firmware, I played around with some of the EQ settings and found that I liked the Focal Elegia EQ. There is an EQ for almost every headset out there, and the Elegia EQ worked with my headphones. Then I uninstalled the browser extension. I don't plan to use this on my computer, since i have a Peachtree desktop amp and Schitt Bifrost/Asgard stack. I'll be using the T71 with my phone and tablet. So how does it sound? I tested the sound using a multitude of headsets from Focal, Sennheiser, HiFiman, Sony and Audio Technica. I also tried some IEMS from Sony and Aful. I can safely say these will power all of the above, even the more demanding planar headphones. The sound is pretty similar to my Fiio BTR7. BTR7 has two 9219 DACs, as opposed to the four 9219s in the T71. I A/B tested these headphones using both the BTR7 and the T71. Both have a very low noise floor, so you won't hear any audible hissing or buzzing. As far as sound quality, both are very similar. If I really focus and quickly AB swap them back and forth, I'd say the T71 is the bit more revealing and has a wider soundstage, but you really have to listen for it. Listening to both at Flat EQ, 192kHz/32Bit, streaming amazon, the differences are minor. Both devices EQ well, so you can really modify the sound to your liking. I think the Fiio BTR7 is a very apt comparison to the Qudelix T71. Both use the same dac, with T71 having 2 more chips. What the Fiio has that the Qudelix doesn't is Bluetooth support. BTR7 supports LDAC and the entire suite of AptX codecs. This is a VERY important feature for me. I frequently will stream music from my phone to my BTR7 around the house via LDAC and listen to musical bliss on some of my full-sized cans. You don't have to tether the phone and DAC via usb-c. Just stick the BTR7 in your pocket and run the cable inside your shirt, and you'll be able to do stuff around the house without having a bulky phone in your pocket. Yes, there is a slight quality downgrade from PCM to LDAC, but man does it multiply the BTR7 use cases 10-fold. What the Qudelix does that the BTR7 doesn't is support 7.1 audio. I really haven't figured out why 7.1 matters in a headphone DAP. I did try the 7.1 setting on the T71, and it sounded more digitized to me. Think what it's like when you turn atmos mode on your phone, and you'll get a good idea. Yes, it widens the sound a bit, but you trade soundstage for sound quality imho. For gaming, binaural audio via stereo will give great directional audio without needing surround sound setting...so i'm flummoxed. Not saying there isn't a use case, but I haven't figured one out. If you don't own another dap and think you can use the 7.1 mode, then definitely give this a shot. I support what Qudelix is trying here and look forward to their future endeavors. But personally, I get a lot more use out of the BTR7 and its support for both PCM and Bluetooth. LDAC/AptX HD isn't as good as PCM, but they are both very useful and great-sounding alternatives when you don't want to be tethered to your phone, laptop, tablet, etc.

This little (and cheap) unit replaces amps and DACs multiple times more expensive - the picture shows the T71 on top of the (now) obsolete hardware it replaced. The Chrome extension control program is comprehensive and allows downloads of PEQ settings for hundreds of specific earphones using the Oratory PEQ database, this is so much more convenient that setting the parameters yourself (which can be done also) like in Topping Tune or JDS labs control software. Incredibly, it does not seem that other reviewers are using this feature - if you are not going to EQ your specific phones, buy something else. There is plenty of power - even for Modhouse Argons, well known power hogs - and the Ether CX can attain hearing damaging volume (don't try it longer than a few seconds). My only quibble is that because I use it as a replacement for my previous desktop devices, its light weight and small size (albeit well made) makes it slide around the desk surface too easily. I also don't like the flashing lights that have different functions. I would like a larger desktop version with feet, real controls, and of course blue tooth LDAC. Such a unit would crush the JDS Element IV ($550) for example. HIGHLY recommended. BTW: it comes with a one year warranty that is processed by the control software (it keeps track of the first day of use and then gives you 364 more days - a great idea). No need for proof of purchase documentation or other paperwork. Thus, I don't understand the experience of the reviewer who claimed to get a more limited warranty (??!!)

This thing is amazing! I bought it mainly for it's 7.1 multi-channel sound capability but man, this makes 2 channel audio sound fantastic. I've been listening to my collection of music using a Hifiman HE-5XX and enjoying my collection all over again. The various equalizer settings are my favorite feature. It really opens up the sound stage.

Amazing product, but don’t buy from this store — I received only 50 days of warranty instead of 1 year.

Before I start my review, I just want to say that I distrust most "audiophile" reviewers, and the T71 only reinforces this belief. You don't NEED an AMP/DAC unless you need to turn your volume up to 100% to be adequate, so in most cases the only reason to buy a particular model is because of it's features. If you're one of these people with an old or underpowered device, in theory you will get an improvement in terms of volume and bass simply from an AMP/DAC alone. Firstly then, no, the T71 doesn't change how your headphones/IEM's sound by default, which is a good thing. The AMP simply amplifies the signal, while the DAC removes any noise from the source. What differentiates this from others is the little physical additions and the software inside it. Physically, it includes both USB-C and USB-A adapters. On the output side, it supports 2.5mm, 3.5mm, and 4.4mm connections. It has a 1000mAH battery, but as I have it connected to my PC I can't comment on how long it lasts. It also has a built in mic, which I would describe as an average headset mic. Sound quality is okay, but it picks up all the noise around you. If you have noise cancelling software it will be passable, but it's not something I would personally rely on as a mic. It's a nice to have feature that doesn't detract from anything. Software is where the T71 stands out, which is frustratingly what most reviewers neglect. Personally I use EqualizerAPO to EQ my headphones and BS2B for crossfeed, but I wanted an alternative. In all my research, I only found a few devices that specifically have parametric EQ and adjustable crossfeed (the smaller Qudelix 5K being a popular example). The Chrome extension works great, and I've had no issues navigating it and updating the firmware. I would highly recommend this method for configuring the T71, as the hardware buttons are bit confusing. The unique feature of the T71 is the dedicated 7.1 virtual surround sound. I'm not fond of virtual surround sound, but in my brief testing it sounds more natural than Windows Sonic at least. You can adjust the volume, EQ, and apply crossfeed to each channel as well. Stereo audio sounds slightly forward when output as 7.1, which doesn't sound bad, but does reduce the soundstage slightly. You can set this to "Auto" as well, which will automatically switch between stereo and 7.1 depending on the source. The EQ is split into two 10 bands. The logic being you can use 10 bands to EQ your headphones/IEM's, and the other 10 bands to create profiles for different scenarios. Personally I don't care about profiles, so instead I use this as a 20 band EQ, which works perfectly albeit a little unintuitive. I've attached some pictures which briefly explains how to configure this. AutoEQ has been abandoned, so I'd highly recommend learning how to navigate squig.link. Different reviewers (good and bad...) can upload their own frequency response measurements and EQ curves. Personally my preference is "Harman In-room Flat" with "Harman 2018 Filters" for headphones, and "JM-1" with "Harman 2018 Filters" for IEM's. Finally, the crossfeed (or xfeed). Crossfeed is a very contentious feature, but I think this is because most people have only heard poor implementations. Qudelix's algorithm uses a 0-50 scale, with 0 being off and 50 sounding like the audio is inside your head. I would highly recommend something between 10 and 25. 10 being subtle, and 25 being the limit before losing detail. Overall, I was pleasantly surprised with this device. With most reviews neglecting half the features, or making claims about audio enhancements with no measurements (seriously, why are there no measurements for headphones with and without an AMP/DAC???) I was half expecting to waste £200 on a fancy USB adapter. If you're looking for a hardware solution to EQ and crossfeed (and 7.1 virtual surround sound), there's nothing else like this. Once configured properly, it's one of the few AMP/DAC's that actually does improve your audio. The fact the developers also acknowledge squig.link means they really are paying attention to the community as well (for better or worse!).

Su DSP es impresionante y su amplificacion maxima es ujna locura es el end game de los dongles en mi opinion

Sold my topping DX5II for this, to save space on desktop. Drives my HD650 and Para II cans with ease (with EQ profile turned on). No hissing detected on 7HZ x Crin Zero 2 or Crin Daybreak IEMs. Much more versatile than the DX5II for headphones/EQ, IMO! Crossfeed is just wicked-sick to use with something like IEMs or the HD650 (anti 3-blob-effect), and sounds a touch less honky-sounding than the crossfeed simulator in EQ APO on windows (Peace GUI), fantastic for gaming and music mastered with that hard left/right panning (think The Beatles, or old, similar stuff for example)! More than enough power for most headphones easily i'd say! Careful on the current-limited headphones though, I'm not sure if this unit can do so well in that regard as it can on the voltage side of things ;). EQ functionality is just bonkers-powerful though - you can run 2 profiles at once, ie 1x for your individual headphones/IEMs and then another setting/EQ profile entirely separate for example to have X-Feed or w/e it is you so desire! Bonkers-awesome of a unit, although expensive, but so damn versatile, holy cow. Wish it had a volume wheel but everything else it has easily makes up for that!