mika, sorry i'm a newcomer here and i can't find info on how you drive your altecs. is it just a shindo EL84 amp or you have another amp for bass.

i'm asking cause i'm also interested in this kind of onken-derived cab for altecs however afaik hiraga and others from paris horn mafia all drove it with SS amps for best results (in fact hiraga 20 or 30 amps).