SennheiserConsumer 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.

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.

This dongle performs wonderfully for audio quality and range, but has poor latency for gaming. For videos & movies, it is good enough.I upgraded from a Momentum 3 with a Creative BT-W3 dongle for atpX Low Latency. I compared the Sennheiser BTD 600 Bluetooth adapter vs. the Avantree DG60P for the purposes of wireless PC gaming on Windows 11 with aptX Adaptive on a Sennheiser Momentum 4 Wireless.The BTD600 on firmware 1.22.0 has about 100ms more latency than the Avantree DG60P in LL mode. Surprisingly, the DG60P only manages an extra 5-10 meters of range over the BTD600 despite the antenna. The DG60P seems to win/tie on all fronts including price. You also get the benefit of instantly switching to aptX-HD whenever you want, if you can hear the difference. The BTD600 only wins on portability and comes with a USB-C adapter. Since I need headphones for wireless PC gaming and I'm sensitive to latency, I'm returning the BTD600 and keeping the DG60P.IMPORTANT: disable the microphone in your windows settings! If you don't, the audio quality will be terrible. This was the exact same situation with both dongles.

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 use this adapter with a pair of Momentum 4's and they reduce latency enough to not really notice issues with movies or games. They do improve the sound a bit, but it's hard to tell.The only issue I've ran into is when using multipoint between PC and laptop. If I'm on a call with the laptop, the PC connection will periodically disconnect and reconnect. This is fine when I'm on a call but the notifications in the headphones are very distracting. You can disable them using the phone app.

Constantly disconnects, tried to pair multiple times and works fine with Windows. Once connected to MS Teams it will disconnect and reconnect and have trouble using it as a device.