BTR11 Bluetooth 5.3 Receiver LDAC 3.5mm Wireless Audio Headphone Amplifier Adapter (White)

Works so well! I never really liked the idea of Bluetooth iems and they're really uncomfortable for me that i cant wear them long so i only really use wired iems for workouts so i love that you can turn ANY wired headphones or speakers into Bluetooth with this. Paired it with my hd599 and can use them all day no problem. It definitely beats any of the cheap dongle style dac/amp in terms of flexibility or convenience. Clarity is very close to wired direct and it plays louder than the apple usbc/3.5 jack also the dac/amp with the cx31993/max97220 chip combo when played from my iPhone (iPad can go too loud no matter what i use)…another thing about the dongle style dac/amp that i hate is that it will stop the song if the usbc connection jiggles a little too much and it does it at an annoying rate…this doesn't even cut out when im in other rooms and away from my device. This little thing makes it feel like I'm using a iPod shuffle again…I love it!

This is a nice and inexpensive wireless receiver. Sound quality is good. Range is ok. Battery life is decent - and I like that I can plug it into charge while I am using it. I am using this with laptop with Linux Mint 22.1, realtek bluetooth 5.3. Initially it wouldn't connect to my computer, I had to do the following for it to work for me: 1) In your bluetooth manager (blueman-manager): search for it, pair with it, trust it. (maybe it works for you after this step, in which case you're done) 2) Install bluez-tools: "sudo apt-get install bluez-tools" 3) Use "bt-device -l" to find its mac address OR right click it in blueman and choose "info" to get it 4) Now type: "bt-device -c 00:00:00:00:00:00" (put your mac address instead of 00:00.....) 5) In my case, after step 4 it asked yes/no about a passkey, just type "y" (see photo) I have had to remove/forget the device a few times and repeat these steps to get it working again. Seems to me the issue is related to whether or not I shut the laptop off without turning off this receiver first. So long as I turn it off before turning the laptop off, it comes back no problem. While I know Linux's poor bluetooth handling is partly to blame, I have other bluetooth devices that never skip a beat in terms of connecting 100% of the time.

Arrived more quickly than the shipping estimate. Sounds clean with no obvious issues. Paired immediately with both iPhone and Windows 11 PC and reconnects quickly when powered on. Strong signal: I've gone into the basement with my device on the first floor or two rooms over and have only had one brief reception fuzz-out so far (through two walls). Case is thin plastic, but that's expected for the price. The positive side of that is feather weight, and it probably helps reception vs. metal. Greatly pared down, cheaper alternative to the Qudelix 5k, which I can't afford right now, and fills the need well. No EQ, unlike the Qudelix, but I can parametric EQ from my PC with Equalizer APO. Feels kind of like walking around with an iPod or Rio used to, which is fun. Small enough to disappear in your pocket and leave plenty of room to avoid feeling weird with a coil of headphone wire in there too, unlike with a phone. Recommended! Edit: meant to mention also that battery life is excellent.

I love this little amp, it's exactly what I was hoping for, exactly what I expect from fiio. Lightweight, small, excellent sound, decent battery, and lots of headroom for my 32 and 60 ohm over ear headphones. The only weakness was the phone call quality, so don't get this to make calls. As long as your headphones are sensitive enough, There's plenty of power to pump bass, even with you phone's eq pushing the bass. Unlike many cheap amps, it won't lower the volume to handle increased bass. Sound is clean and consistent up to max volume. While switching codecs in Android dev options, I can immediately hear the improvement of LDAC. It's close to the famous quad dac in my LG G8, and you can hear the difference between Lossless and Hi-Res Lossless. Be sure to set your LDAC dev options to 'Optimize for Quality', and you will have a listening experience close to a decent wired headphones amp. Of course, not as good, but close. A Samsung phone will allow you to make a shortcut to this setting using Search. Important because Android always sets LDAC to 'Adaptive' every time you connect, which can limit quality. It's an old bug they may never fix. If you're familiar with fiio, this is consistent with their usual commitment to excellent sound quality for the money, with a simplicity-done-right design. For the price, it earns 5 stars. In a dark room, I wish you could disable the blinking light, but I taped over it. This still perfectly achieves my goal: high quality wireless open-backed headphones. I like my pre-made wireless headphones, but NOBODY makes an open-backed wireless headphone, so this is still the best solution, especially if you collect and modify wired headphones.

First bluetooth LDAC and second DAC I own, first being the HiBy FC4 with screen. The size of this is much more compact compared to the FC4 and boast a sports clip AND option for a lanyard or wrist strap! The price range is under 20usd so a much want for those who want to turn their cabled iems/earphones and headphones "wirelessly" without buying a BT iem hook adapters and for those who are on a budgetand want to get into the world of DAC. Nothing beats wired cables directly into a DAP or DAC but if you want your cables to be bluetooth, these are decent enough in terms of sound. It is still loud enough, but it isn't too loud compared to a DAC that is physically connected to a DAP/any device. No distortion even when volume is at its max. But there seems to be a sound lost since its bluetooth. The buttons work properly controling the volume and playing and pausing the music. Holding the play/pause button causes it to search for device after a few seconds, however, holding it longer will turn off the LDAC. For less than 20usd (without tax; 20+ with tax) it is not only compact and small, it is lightweight! There is a mic on it but i don't use it as I use this LDAC for listening. You can get way over 3 to 4 hours (more than this) at 100% battery life. For the one I have, at 100%, it dropped to 60% of nonstop listening after 4 hrs connected to my HiBy R6 III on 20 to 50% volume.

When this thing works, it really works. I bought it wanting a cheap Bluetooth Reciever for my IEMs. A few months after getting it my monitors started acting up. The right ear piece would go out and no matter what I couldn't get it to work. It was like the volume for it was 30% of what it should be. It looked like the connector on the IEM was damaged so I bought a new pair. A couple months later and the same issue happened, with the same ear. I tried replacing the cable for both sets and that didn't solve the issue. Eventually I tries the IEMs on my home setup, connectting them straight to my DAC on my PC. Both sets of IEMs ran fine without issue. So my only assumption is that something with this device is faulty. That being said, when it did work it was amazing. It had some of the strongest connections I have ever seen from Bluetooth and the sound quality was great. I just can't justify buying a new one of these though. The feature set is extremely limited and I worry about the same issue appearing with another one.

High quality and works really well on PC with Alternative AD2P drivers installed for specific codec selection on windows. The main drawbacks are power output on overear headphones being a little weaker than IEMs, volume steps are somewhat inconsistant in windows, the range and signal integrety being a little spotty even when near my pc (it could just be the specific codec selected but the kind of sound issues sounded more like a line of sight issue rather than just a bad connection), and the weight of the device itself means that its better suited to being wrapped and then clamped on to the cable around your neck or in a pocket. The battery life is respectable and can get through 4 or 5 hours depending on the headset used. The audio prompts could use a revision as they are oddly worded and sometimes unclear sounding, but they get the job done. At around 20 dollars it fills a very specific niche extremely well.

Simple to use, sounds great with my Tin T2 IEMs and my Koss Porta Pro, Battery lasts for at least 5 workouts and its small easy to hide. At its current price you can't beat it. Buying a second one now.