BTW, you know your old when you blow a tweeter fuse and just don't get around to replace it.....
I automatically performed the mods.
Never tested it stock.
I find ERS Paper (quantity/location depending on application), Noico Internal Damping and Mass Loading improves any unit 100% of the time (for me).
Into the Pangea, I plugged two Foundation Research LC1 Power Lines leading to my CD Player and three power cords leading to my three sub woofers. Also plugged in three Enacom AC Filters.
My Amp, Pre Amp and TT are on another circuit with different power conditioning altogether.