Sennheiser Consumer Audio BTD 600 Bluetooth® Dongle - USB-A/USB-C Adapter with AptX Audio Codecs for Stable, Sound - Listen to Music, Make Calls, and Watch Videos

Update: Since I posted this review, the BTD-600 had a firmware update that has completely overhauled the device and improved the audio quality in major ways. For starters, the most recent firmware update claims to add support for the sample rate, 96khz. I say claims to because that's not what my Qudelix-5K Bluetooth DAC is reporting, and even before this update, Windows let you select 96khz. I suspect even if it did support 96khz, the Qudelix would not be able to receive it at that rate. It uses the QCC5124 chip, and if you look up the features, the chip doesn't seem to support 96khz. The first mention of 96khz audio came with Bluetooth 5.2. With the BTD-600 being a Bluetooth 5.2 adapter, it would make sense for it to support 96khz, but I don't have a device capable of testing it. For the record, it seems that chips that support AptX Lossless use Bluetooth 5.3, so I doubt this adapter will ever receive an update adding AptX Lossless. While I can't say whether it's actually transmitting 96khz, I can say that the 280kbps limit has been lifted. On my Qudelix-5K, I'm able to receive audio generally from 350kbps up to a maximum 430kbps, and the difference in audio quality is significant. Before, the audio quality was noticeably compressed. Not terrible, and the benefits to latency make up for those shortcomings, but also not great. Now, to my ears, it's functionally perfect, and the best part about it is that it does this without affecting latency. It still seems to deliver 80ms of latency, just with significantly better audio quality. This is very different from adapters that have separate low latency and quality modes, like the Creative BT-W5, which seems to at least double the amount of latency when in quality mode, and limits the audio quality in low latency mode, similarly to how this adapter used to work, and that adapter is 25% more expensive than this one, and in terms of its implementation of AptX Adaptive, it's just worse. For this reason, this is an exceptional adapter for movies and games, which, in my opinion, is the big draw of AptX Adaptive. If you just want high quality for music, AptX and AptX HD are open source now. On Windows, you can buy Alternative A2DP for $5 and get high audio quality, without needing separate hardware, and I'd expect more devices to start supporting AptX and AptX HD by default from now on, but high audio quality and low latency is something you can only get from AptX Adaptive, and even other, more expensive products aren't able to deliver what this adapter does. That being said, it's not completely perfect. I noticed some stutter. It's pretty bad when you first connect your device. Over time it becomes more stable, but brief instance of stutter still happens occasionally. Signal strength is far more important now than before, probably because it's not hard to keep a 280kbps audio stream stable, so you're going to want to keep a clear path between your headphones and the adapter, and try to keep distance as low as possible. Maybe this is improved with a Bluetooth 5.2 receiver/headphones, but I can't speak for that.

Works great to bypass apple products limited Bluetooth transmission for much clearer sound quality. Will not work with iPhone unless phone is also being charge due to power withdrawal limits of those devices. Works with iPad and laptops well and easy to connect.

Plugged this tiny dongle in and my connection issues vanished. It paired instantly, shows up as a dedicated audio device, and just works—no fiddling with drivers or menus. Range is excellent; I can walk to the kitchen without a single hiccup, and the link stays stable even in Wi-Fi-heavy rooms. Latency is noticeably lower than my laptop’s built-in Bluetooth. Movies and YouTube are perfectly in sync, and casual gaming feels snappier. Mic quality for calls is clearer too—coworkers stopped asking me to repeat myself. I tried it with a few headsets, including my Sennheisers, and switching between music and meetings is seamless. It’s small, sturdy, and the pairing button makes connecting new devices painless. If you’re tired of flaky laptop Bluetooth or want better call and video performance, this little adapter is a five-star upgrade.

I can't believe the difference in sound quality! It works perfectly. Be sure to read the quick start guide because it's a little tricky to setup. Apple users...you need to know that you will no longer be using the internal Bluetooth, you will now be using the adapter. You actually pair your headphones to the adapter. Also, be certain to download the Momentum 4 app on your iPhone. There, you can see if you are now using aptX, which is necessary to transmit the music in High Resolution. If the CODEC doesn't say aptX, you are not getting the highest quality sound. Keep trying.

My initial experience with the Momentum 4 Bluetooth headset was not positive. When paired to my phone, the sound was great and the connection was great. Once I paired to my Windows 11 PC though it became almost unusable. There is an issue with Windows forcing AAC codec and once I disabled that and the microphone, it was improved but my range was still quite limited. Once I got this adapter and paired the headset though this instead of my integrated Bluetooth, 180 degree change. Sounds improved, range is improved and the ease of use is simple. I'm really happy with the headset and the adapter really made it work well on PC.

I have a pair of Momentum 4 headphones and use them with a Windows 11 PC. At some point they stopped working reliably, probably due to driver shenanigans. If I moved more than a few FEET from my computer, the sound would cut out and be unlistenable (before this, I could be in a totally different room with no audio interruption). After getting this device, which I stumbled upon via a reddit post through a web search, the problem has been resolved. Ideally Sennheiser would improve their driver/software connectivity (or Windows for that matter, but somebody has to fix the issue), but this at least fixed the issue for me. It should come with the headphones.

my work lap top has a crappy blue tooth receiver in it, would not stay connected to my Bose head phones and when connected was crackly. Used the cord for a while but hate cords. Found this and it works like a charm. connects to my headphones crystal clear audio and no issue. stays plugged into my work laptop 100% of the time. With fact my headphones can connect to 2 devices at once. I can hear my alerts from computer as well as listen to music from phone.

Every Bluetooth behavior is wrong. Doesn’t hold a connection when you’re using it. Recaptures devices when you’re not, even when the host device is powered down. Fails to connect to headphones. Requires several power-cycles per day to work at all. Utter garbage. An embarrassment of incompetence.