As of yet, no one has implemented Bluetooth audio streaming without degradation to audio quality. Therefore, recommendations are quite redundant.
Given that most people are streaming mp3s or CD rips then APT-X HD is generally of a higher quality than the source.
(I don't have any recommendations for speakers though. There probably aren't that many as the SD slot will make the waterproofing trickier.)
APT-X HD is not going to improve a lossy source. It's not going to improve a lossless source either.
@aggi started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
As of yet, no one has implemented Bluetooth audio streaming without degradation to audio quality. Therefore, recommendations are quite redundant.