I've got one of these but it won't pair with the speaker. So I just assumed it was trying to pair speaker to CXN not CXN to speaker, if that makes any sense?
Right,just had a proper look at the Cambridge Audio kit and I think you are getting mixed up. The CXN is a network streamer to allow connection of digital sources. It would then be connected to an standard amp which in turn would be connected to ordinary speakers.
The BT100 adapter is not compatible with the CXN. According to docs it is only compatible with the DacMagic Plus,Sonata NP30 and Stream Magic 6.
Well, there are Bluetooth transmitters (often used to run Bluetooth headphones from an audio source). Something like this one are reasonably cheap. But why do you want to do this? Adding a bluetooth link into the chain will significantly degrade the audio.