I'm a former XP Deus user and have been searching around for aptX LL headphones similar to my old Deus WS4 wireless backphones so that I can wear sunhats. I purchased the 66 AUDIO BTS Pro's last week and was pretty disappointed after syncing them up to the Equinox 800 and no aptX LL!!! I contacted their tech support and didn't hear anything for a couple of days. I boxed them up to return to Amazon and just as I was heading out the door to the UPS Store I received an email from them saying "We wi
I'd definitely contact their support at support@66audio.com. They should be able to send you a firmware to enable aptX-LL. Here's what they sent me, might even work on your unit.
Here's an update from our team!
Please click this link: https://www.dropbox.com/s/xqspc65hb2lcyas/BTS_Pro_6_9_5_LL.exe?dl=0
1. Connect headphones to a PC
2. Hold "<<" "66" and ">>” buttons until the LEDs turn off
3. Run the update, press y
This should enable aptX LL on your unit.