There are a number of speakers on the walls on the ground floor, pics of the insides:
They're fitted with transformers for a 100V line PA system. Audio quality is likely to be poor.
Charles has mentioned getting an amp for them.
Apperently they are the same kind of thing as the ceiling mount ones we have in the old space.
The wattage of any amp we get has to be >= sum of wattage of speakers.