My friend has the Oscar trio and the bsss is bottom port loaded and has very fast tight bsss , in our audio group multi state I have heard both the due
and bigger Parker at #24 k and their Diamond at $35k
they use Mundorfs mid grade Evo oil capacitors , should me the Supreme line
we are upgrading to all Jupiter Copper foil waxed paper , with .01 Duelund Tinned copper foil bypass caps ,inductors are very copper foil type ,jorma wirung excellent
as are the WBT connectors.