Ayre V-Kxe and Thiel 2.4s

This commentary regarding power supplies made me start wondering about my house's (rather poor) electrical situation. I'm in a short term (2 year) rental of a house built around 1940 and much of the house is on the same circuit as my electronics (and will actually blow if my girlfriend uses a hair drier or electric heater while I'm watching TV or listening to music). Given the temporary nature of the situation, I don't think I can run an independent 20 amp line, but is there a way to check whether that circuit is impacting the amp's current draw (and therefor my system's bass response)? Aside from having noisy power, my uninformed opinion was that current delivery wouldn't be a problem unless the fuse was breaking when I tried to play music loud (which has never happened).

Charles1dad, I can't and won't discount Stevecham's listening experience, but he's the one that first provided measurements to support his position. I respect that he also offered this objective argument to his position. After all, without it; it all just becomes unsubstantiated opinion. That is not to say that subjective opinion is not without merit, and that includes his as well. Bear in mind, that I also offered similar subjective opinion with similar, if not quite identical gear. Furthermore, the OP's experience has suggested that under-powering these particular speakers was less than satisfactory. FWIW, based upon the posts here on Audiogon most seem to agree with Thiel, the OP, the usual technical arguments and my experience too, rather than Stevecham's.. If Stevecham is happy with his rig, power to him, but the OP is seeking advice and I opt to provide mine too. Speaking of which, what are you providing?

Charles1dad, the last line of my last post was uncalled for. Please accept my apologies.

Cal3713, FWIW the Pass XA30.5 is a 15 amp draw.

I've never understood the argument of using the efficiency rating of a loudspeaker insofar as determining power requirements for an amplifier. I'm beginning to wonder if there is more to the equation. I'm currently using the V-5xe with Hales T8's which run at 87db and have nominal impedance of 4 ohms. I've been told by experts (someone who actually sold them) that the speaker needs enormous amounts of power. With the V-5xe I have never turned the preamp volume setting past 9 o'clock. With a threshold amp (which had the same power rating), anything past 8' o'clock would shatter window panes and my ear drums.