last night i listened from about 7:30pm until almost 2am. it started from 'better' than anything i'd ever heard' and just kept getting better and better as the night went on. i could not stop. and this morning i was pretty gassed. at 61years old there is a price to pay. OTOH the smile from the experience is still on my face even thou my head hurts.
the highest watt number i saw on the 458's was '42'; and that was at warp factor 9 on the SACD of Micky Hart's-Kodo 'Mondo Head', track 7, Daraijin. this was likely at 110db++. mostly i saw between 0 and 10 watts. words cannot describe the absolute dynamic drive of the bass with the 458's combined with the -4- 1000 watt amplifiers on the bass towers. and the complete lack of any stress anywhere no matter what the task the system is called upon to do is spooky. from another planet. mezmorizing.
"stay up till 1:45am and who cares" kinda stuff.
sorry i can't show 500 watts, but not sure it would not vaporize me with these amps on these speakers.