I am looking for specs on the B series head. The Ampeg website seems to have some trouble, at least in this area (sign of new products?). They list only the B4-R and the B5-R. The B4-R seems to have the specs of the B2-R! The B5-R shows the rocket bass! Anyway, I am looking for the power ratings (4 and 8 ohms) of the B heads. Has anyone that info... whatever product it may be. Thanks! PS: no, no GASing... why?