Glad I gave you some place to vent!
Voltage drop would never be a concern unless you want to go deaf! Big power amplifiers never reach their maximum power output into very low resistances for the very reason you mentioned, the powerline sag. A huge amp with a maximum 20 amp draw on a 20 amp mains is going to behave just like a 15 amp one on a 15 amp mains.
@thriftyaudio your Panamax 5300 is none the worse for wear after 20 years since there are very few active components in the thing except for the MOV on the AC input and if the unit ever delt with a surge large enough to open it, it would be dead. The only other active component is the one that disengages the power when yours goes out requiring you to turn the unit back on manually when your neighborhood's power is restored. Personally, I think you'll be hard pressed to find a power conditioner as well thought out ergonomically and with as many useful AC receptacles on it, especially the fact that they are oriented with the ground lug on top which prevents heavy power cords from inching their way out of the socket. It also has the simple dimmable voltage and amp indicators on the front. As well, you can easily replace it if it breaks for less than $600 or if it takes a hit eventually and it isn't completely fried you can replace the MOV and you're back in business. It's nice to be extravagant but pragmatic is better.
