Hay thank you so much for the advice , I will definitely try all this. What I am realy trying to get close to is the PMC MB2s XBD studio monitors as the cabs are designd around them and all the drivers ,so the info is out there but its all a matter of putting it all together with the filters .. If I could pass all the info onto someone else I would 
, anyway your help is much appreciated.. All the very best from Japan ,,
, anyway your help is much appreciated.. All the very best from Japan ,,