1Mii B06HD+ Hi-Res Bluetooth 5.1 Music Receiver for Home Stereo w/LDAC, Hi-Fi Bluetooth Adapter w/Audiophile DAC aptX HD Volume Control OLED Display, Wireless Audio Adapter for AV Receiver/Amplifier

Stable bluetooth connectivity with no lag - good range - HiRes audio quality - useful volume control and long battery life ... music streaming using a Sony mp3 player via LDAP to a TEAC integrated amp - gret sound quality ...

I wanted to stream Bluetooth to my vintage audio setup, and started out with a cheaper TaoTronics unit that worked fine, but when A/B'd with my turntable, sounded very flat and undynamic, no matter how much I played with EQ and volume levels. I eventually realized that while the TaoTronics supported the AptX audio protocol, it only supported AptX/LL (low latency), and not the higher bitrate (thus higher audio quality) AptX/HD.I looked at a bunch of BT receivers and read a ton of reviews, in particular looking for units with an upgraded DAC and support for as many wideband BT audio protocols as possible.The B06-HD+ seemed to fit the bill, and I liked that it had RCA outs for my vintage amplifier (it's got coax and TOSlink as well for newer kit). Many units like this seemed to just have a 3.5mm out, and I didn't want to use a flimsier headphone to dual RCA adapter, vs a good old chunky RCA patch cable... The RCA included in the box with this unit is puny, mind you, so pick up a beefier one if you don't have one on hand.Out of the box, it's well built, feels sturdy, and is a clean design. Likewise the packaging and instructions are well above what you see with a lot of products like this on Amazon. Mii seems to be on par with some of the other newer Chinese vendors that are targeting the mid-tier audiophile market like Donner, Little Bear, and Fosi.Setup was simple, and the little box paired easily, and has a nice readable display with tactile buttons for power, volume and pairing. I like that there's a volume control on the unit itself that's independent of the volume on my phone, so I can tweak both, and dial in an optimal volume that matches my turntable's volume level, that way bouncing between Bluetooth and LPs doesn't have a big difference in loudness.In the case of the Pixel 5 I was using, the unit handshakes for Sony's LDAC protocol, which is actually a fair bit better than AptX/HD, with LDAC supporting up to 990kbps vs 576kbps for AptX/HD. Rad, actually don't have any other devices that support this protocol yet, other than a pair of headphones.OK, so how does it sound? On par with vinyl, to me, when playing lossless tracks via Spotify. Better than CD. I don't throw either of those bits of praise around lightly. Clear, dynamic range, stong lows and highs, very clearly defined soundstage, lots of warmth and lots of detail. This is via a vintage 100W Audiophonics SA-3180 amplifier, with a Teac EQA-10 in the preamp loop, into vintage Polk Monitor 5s.The unit has solved the problem I bought it to solve, which was a jarring difference in audio quality when switching from vinyl to listening to Bluetooth audio. I no longer experience listening fatigue after an hour or so when streaming Bluetooth, and the level of clarity in detail in the audio is terrific.Since I directly swapped a different BT receiver for this one, with no other changes, I can honestly say the difference is this little receiver, its supported BT protocols (make sure you know how to tweak your settings for optimal audio bandwidth and force AptX/HD or LDAC), and its DAC.The B06HD+ is night and day better than the TaoTronics BT receiver it replaced, and in my opinion, worth the price and then some.Only gripe? On my vintage rig, I get a little hum, very faint. I'll probably end up grounding it to my amplifier if it annoys me enough.

Works as advertised.Pros:1. Sound quality is excellent2. The LCD screen is surprisingly helpful, for knowing what codec is being used, also for quickly diagnosing and resolving occasional pairing/connection issues that every Bluetooth device has which prevents a lot of frustration.3. No unnecessary anoying connection beep sound4. Good build qualityCon:1. it turns off by itself after nothing is playing for a while. I would rather it stay on and connect automatically when I get home instead of having to walk over to the receiver to power it on every time.

Before purchasing this device, I ordered and tried a different, similar BT transmitted by another manufacturer, one with great reviews. While I was able to use that device with analog RCA outputs to my 1999 vintage Pioneer A/V receiver, I was unable to get any signal from the coax and optical outputs into my receiver. I know the A/V inputs worked, as I was able to use them with an LG 4K TV and other devices.I ordered the B06HD+, connected it up the same way and, again, failed to get any output signal into the receiver. However, the status screen on this device displayed that, by default, the BT receiver was locked on the LDAC codec of the BT chipset. The sampling bitrate for LDAC is 96 kbps, which is beyond the bitrate that can be handled by my 23-year-old receiver.Android mobile devices generally handle BT codecs automatically and will use the best available code (in this case, LDAC) on the connected device by default. There is no easy way to change to another BT codec (such as aptX LL or HD). In order to do so, the user must access the Android Developer Options, which allows access to hidden functions, including switching to other BT codecs. Access to Developer Options varies in different versions of Android, and current releases (such as Android 13) have a toggle in System settings that allows the user to enable them.After accessing that option on my device, I switch to aptX HD as the codec (using a 48 kbps sampling rate) and the signal suddenly worked fine on both the optical and coax outputs into my receiver. I later discovered an app for later Android devices on the Play Store that allows BT codec switching on the fly. I now get a crystal clear optical signal into my Pioneer receiver and the music sounds tremendous.I detailed all this in case other Android device users are experiencing similar problems. Oddly, the device I originally tried did not function the same way, so it's been returned in lieu of the 1Mii B06HD+ receiver.Another tip: the unit has a built-in battery and users can also plug the provided USB power cable into any 5 volt USB adapter for direct power. However, the power to the 1Mii will remain on unless you physically turn it off using the power switch on the unit. There's a workaround for this as well.My Pioneer receiver has a switched electrical outlet on the back that powers down when the receiver is powered off. I plugged the 1Mii into this outlet for power. When I power off the receiver, the 1Mii remains on using the internal battery. After ten minutes or so, if there is no live signal across the 1Mii receiver, it will power off on its own to preserve battery. When I power up the Pioneer receiver, the 1Mii also powers back on. I can do this with the Pioneer's remote control, so I don't need to physically power off the 1Mii after I'm done with it.The reach of the Bluetooth signal is very good, despite the use of an internal antenna. My devices are used in the same room, so those moving their mobiles or other devices around will have to test to see what the range limits are.All-in-all, I'm pleased with the performance of the 1Mii. The analog signal output through the RCA jacks is very clean, but the digital outputs provide a higher level signal, so those are preferable for my use. Hearing crystal clear music through my old A/V receiver from various BT sources is terrific, and the 1Mii does a great job of providing that option.

I initially had bluetooth connectivity problems, but that has been resolved. Not sure exactly how, but it now connects consistently without problems.One thing that seems to have helped is turning off the unit after use, using the power button, and turning it on prior to connecting with bluetooth. If you leave it on all the time, I found it difficult to disconnect the unit from bluetooth. I also may have had some interference from my wireless headset when I was pairing it. It works fine now and sounds beautiful. I wish I had waited a while before I wrote my initial review, just took me a while to get it working properly. I really like the device, sounds great and no more connection problems. I also like the scrolling text showing the song names.