right!
i've got one set of the old models.
the new ones has diameter 10 and 11 inches.it doesn't sound so good.
these drums(old or new models) are not sounding exactly like a real conga.they are good to go to rehearsals or if you've got a gig playing the set (timbales and congas together).
what i did to get a better sound:i'have changed the rims for two lp confort curve.
i've put 2 skins remo fiberskin 3.
i'm tuning the conga in C and the tumba in F.
now it's almost a real sound.
if you tune highter,they sounds badly.
the two drums(old models) got the same diameter of 11 inches.
buy,fred el pulpo