Hi,
MOST of the Bose range will actually be fine, one of the "features" they have is that the speakers can get wet and be fine........
This is the case for most of the commercial range.
They do have some specific "outdoor" speakers.
I have to say that "Soundtube" external speakers were my choice above the Bose outdoor speaker.......The speakers that you could place plantson top of so not seen as speakers..........
Hope thats of help - I would not run Bryston amps on anything outside, the risk of a short in the system is to high in my opinion...........A rodent could chew through the cable, or even a pet, water ingress etc..... to high a risk for my bryston beauties...........
Andy.
PS - Nice ppol & Garden.