From their product page:
" The power supply a.k.a. fuel tank, is of the latest Blue Circle "IAOE" design. The BC509 has a power supply filtering capacitance over 200,000uF. That is more than most 100 watt stereo power amps. This will ensure a very stable power supply, however for the ultimate goal of a silent running power supply, the BC507BA has a 1,000,000uF (1 million micro Farad) additional battery power supply."
1 million uf. That's A LOT. That's more than what can be found inside of the finest power amps. Does that much even make sense?