I want a four-Ohm extension to use with my SWR Black Beauty (four Ohm), but am not absolutely sure of the net differences I'd experience between these two choices. The Junior has enough power handling capacity, but would there be any advantage to the Goliath other than getting the BB's control panel stacked up closer to eye level? Would there be a loss of sonic efficiency with the additional speakers in the GIII over the GIIIJr - or the contrary? [For those unfamiliar with the Black Beauty, it's essentially a rearranged 350X amp mated to a four-Ohm version of the Son of Bertha, or a 1x15 version of the Redhead, if you want to look at it that way.] As always, thanks for any help.