I have owned this device for about a year now after previously owning other similar offerings from Fiio, iFi, and EarStudio. The first six months were spent paired with an iPhone and the second six months with a Samsung Z Flip 5 (more on that later). Fiio makes great sounding products but I wound up going with iFi again for this purchase for a few reasons: 1) There's a warmth to the sound from their devices that I always find myself coming back to, 2) they center their entire product design around a "no screen + analog controls" philosophy that on paper looks like a disadvantage compared to most competitors and their OLED displays but in reality it's a leg up (a screen means firmware is required and that means the device can brick) and 3) I find their X-Bass add-on to be a perfect feature for my own personal tastes. The bonus 4th item I would add to the above list after using this device for a while is perhaps it's unsung killer feature: unlike a lot of the "dongle with screens" everyone is throwing out there to get something out there in what is becoming a very hot product niche, iFi's Go Blu was clearly designed with a purpose in mind and that is to be the smallest, easiest to use, format agnostic and best sounding portable BLUETOOTH device out there. Yes, this will function over USB-C as a DAC and will sound great, but the bread and butter here is being able to work with any number of devices across any number of bluetooth codecs seamlessly. On this front I can say it succeeds in spades where all others have failed. I primarily use this between a desktop Windows machine with a Fiio BTR3 Pro bluetooth transmitter/receiver and my Samsung phone. It works with both flawlessly, but because of Apple's draconian insistence on using only their own proprietary bluetooth codec that prioritizes connection and latency over quality, you can't really flex the full specs of the Go Blu when paired with an iPhone unless you are connected to the phone as a dongle with a cable. Otherwise you're stuck at 16/44 in the SBC codec. Getting an Android phone that can match the GoBlu's 24/96 LDAC capabilities is where this really starts to shine. Pair it with high quality, lossless source material and only then do you realize just how high fidelity of a listening device this actually is. Thankfully, however, it is extremely forgiving on sources of lesser quality. It's not that 16/44 over SBC or even AptX sounds BAD, it's just that lossless at 24/96 over LDAC just sounds better in every way. I mainly listen using a pair of Fiio FD5's with their upgraded LC-RD Pro cable using the 4.4mm balanced plug. In all honesty even on direct A/B testing of the same song at the same time, I genuinely have a hard time hearing much of a difference between the 3.5mm unbalanced and 4.4mm balanced plugs featured on the GoBlu with regard to the Fiio earbuds. When using my Sennheiser HD660-S however, the story completely changes and the 4.4mm option adds a nice extra amount of sub-bass that is missing on the unbalanced option. And yes, it definitely has enough power to make those cans shine. Regardless of what I am listening with, I really love the X-Bass feature as it adds JUST enough bass to get a true sub-bass/woofer feeling with my FD5's and to add needed depth to the 660S's. It's usually the perfect amount of added bass when switching from listening to rock over to house music or hip hop. Never muddies things, either. Lastly, I will say that I absolutely love the volume knob iFi has come up with once I figured out the proper orientation to make it easy to use as it was intended: as a very precise, small-stepped way to increase the volume. It's great that this device always takes over the volume of whatever your BT source is and adds all the steps of precision as your primary volume control. I have spent a long, long time trying to piece together the ideal, portable, high quality listening setup for the way I listen to music today and I must say, I can't imagine anything else coming closer to checking basically every box as the GoBlu and Fiio FD5 pairing. Whether it's the Burr Brown circuitry or the insistence on bypassing any local Snapdragon on-chip Bluetooth and using their own internals even on low grade bluetooth codecs, there's just something about the iFi sound that is satisfying across the board for any type of music. It's also flawless in at the connecting/reconnecting game no matter how many devices you throw at it. There's a lot of great sounding options at this price point that you really can't go wrong with from purely a sound quality perspective. Where I think the iFi outshines all others is with its purposeful design toward doing one thing flawlessly and ensuring the longevity of the device by limiting exposure to firmware upgrades and the pitfalls of a screen-based device OS. Can't recommend this thing highly enough.

Excellent. I wanted a nice amp/dac to connect my iPhone 14 to my zmf atrium. I tried a chord mojo 2 but being tethered to my iPhone was annoying. The mojo 2 is heavy, the available mojo to iPhone cables are really short so if the mojo gets bumped off a table it takes your phone crashing down with it. The GO blu is great. The Bluetooth pairs easily and stays solidly connected across my house. The audio quality is excellent for the price point. It drives my atriums with no distortion. Charges quickly, even with the original Apple low current, 5v charger. Tiny in size so incredibly portable. Couldn’t be happier.

Makes using your wired IEMs even more versatile and useful. The sound quality is very good even better if you use a wired connection.I've had no problems with the Bluetooth whatsoever. Connected Right away without having to do anything right out of the box. I did have to do two firmware updates which was easy enough you have to download them from their website "just scan QR code on back of device "and install their installation app. As many as said there is definitely a little bit of background noise but after I did the update it's not as noticeable. It drives my IMs very well I usually listen at about half to 3/4 volume without any problems. The bass boost and soundstage boost is really useful and sounds amazing. I would highly recommend getting the case with the clip to go with this it is very small and makes it much easier to handle. It comes with a charging cable but no cable for connecting to a device. Which at this price point it definitely should come with one. If you're looking for a Bluetooth deck this one is definitely worth it. 4 Stars for no case with clip and no cable for connecting to devices included.

This is a marvelous little amplifier, with some terrific bonus features. I initially bought this only to use my audiophile Ananda planar headphones untethered with my phone (I typically used the HiFiman headphones wired to my Denon system or desktop DAC connected to my computer) but it has proved incredibly versatile. The sound quality through Bluetooth really surprised me, with a wide default soundstage and crisp, detailed instrumentation; it compares quite favorably to the sound when the GO blu is connected directly to my laptop via USB-C (dual input, another bonus!). The direct connection is brilliant but, honestly, I'm so pleased with the Bluetooth sound that I sometimes connect it to my main computer so I can wander around the house while listening to my full music collection. There are an array of easily accessible options too; "Xspace" provides an even more expansive feel and there's an "Xbass" booster of course, or you can combine both, while the default flat settings should please purists. In addition, there are balanced and unbalanced cable outputs and stellar battery life. One of my favorite features turns out to be the microphone; the ability to use voice control and take calls while tethered to my Ananda Headphones is not something I expected. And Friends and family say call quality is great. The real surprise is that all these features are packed into a truly tiny, lightweight device. Obviously lossless audio files are ideal when listening through amps and headphones like these, but the GO blu even manages to improve the sound of old mp3s. My only complaint is not with the GO blu itself but with the clip on their protective case which I purchased separately; the case may offer protection, but the clip does not hold or grip very well (it's too short and fits only very narrow belts while also tending to slide off or flip along the edge of pockets, owing perhaps to a weak spring). However, the GO blu is so small and portable, it is easy to just throw it in a pocket and forget about it. Even with the small caveat about the case, the GO blu is a remarkably convenient bit of kit that fills multiple needs and fills them well - I'd recommend this little gadget to anyone looking to improve their digital audio listening.

Das Gerät ist sehr zu empfehlen. Musik hört sich gut an, und die Lautstärke Regelung durch den Drehknopf ist super. Außerdem hat es verschieden Modi, die z.B. den Bass boosten. Man kann diese einfach per Knopfdruck wechseln. Das ist ein nettes extra, da es auch unabhängig vom Equalizer der Quelle funktioniert. Einziges Manko ist das Grundrauschen. Es ist für mich mit empfindlichen IEMs deutlich hörbar. Sehr schade, ansonsten wäre der iFi GO blu perfekt

Good sound .. Plug and play . dont need to be a sound technition . Iam using it with IE900 ,and its fantastic !!!

me enjoy loud music so this is a joy to use. is simple i like it

小さなボディから想像出来ない位、良い音で楽しませてくれます。 他の方のレビューにあったホワイトノイズは、低インピーダンスのイヤホンだと、確かに気になりますが、iMatchを使うと全く気にならなくなりました。 もう少しインピーダンスの高いイヤホンでは、アッテネター無しでも、全くノイズは気になりません。 他に特筆するべきなのは、Bluetooth接続が安定している事。いくつかのレシーバーを使って来ましたが、Go blu では一度も音が途切れた事が無く、音楽に集中出来ます。

Es impresionante el sonido y la calidad de este producto por el tamaño que tiene. Es ideal para toda clase de auriculares ya que podrá moverlos sin problema. No es barato pero la su calidad lo vale. Muy buena compra.