I would say they are not surdo drums, as these sound basically like a bass drum ... because that's what they are ... cylindrical bass drums, that look like giant floor toms.
If it sounds like a timbale, it's going to be a
repenique.
 | 30x23cm (8") 30x25cm (10") 30x31cm (12") |
They really aren't that big, but it's a double-sided metal drum ... no snares. The Brazilian snare drum is called a
caixa.
For more information and photos of various Brazilian drums and percussion instruments, visit:
www.brazildrums.com