When I use a tube head with a ported cab, I'm not super pleased with the tone. Seems the combination significantly reduces definition and clarity. Is this other's experience as well? Example- my SVT tube heads (both 70's or SVT-II) used with Eden ported cabs leave me with a blah impression of my tone. But the same cabs with my B1500 sound great...yeah some of that must have to do with the higher wattage of the Carvin...but the SVT heads sound great with my sealed cabls. What are your experiences?