I was also wondering how to secure speakers on those brackets. There are no holes or other visible mount points. The only way to do that would be some kind of glue/silicone which would be strong enough to keep them in place but also easily removable if you want to remove them.
The guy who design them willing to do set for me and asking £ 60 for pair.
What do you think?
You could try the rubber glue they use to attach debit/credit cards to paper when you receive them in the post!.it's 99% non solvent and should not Mark/stain the speaker base's..or you could have them made with little holes and get someone handy with wood to drill some tiny threaded holes into the base and attach them with counter sunk stainless steel screw's?..either way they look stunning..