My experience, after trying out stacks of poweramps, is that the trafo`s just has to be big. But not neccesarely that big in VA or watts but big in wire-diameter. Current is like water, and lower voltage means we need coarser pipes to compensate. Trafo`s primary windings should be ca the same diameter as what comes from the fusebox, and trafo`s secondary windings should then be big enough to compensate the voltagedrop.
And of course, speakerwires a.s.on must be same size if this shall breathe and bloom.
This should be the key to make what will be concidered as a "fast amp" while cheaper trafos with thinner windings might be compensated by using a huge capacitor-bank to help them breathe. But this "breathinghelp" will necessarily come a little afterwards and make the amp a bit slower or not so weightless, light on it`s feet.
This post has been made by using google translator
