Dear Rick, I read Martin Glasband's letter in the back of the June issue of Stereophile with interest. Tech can handle the entire system, including several class A amps AND the P300 and not even get warm. I paid about the same for both the ET2Q and the modified P300.
Tech is a better product.
It provides balanced AC to my two 200 watt class A amps with no apparent loss of headroom at high volumes. Tech a huge bargain in comparison. I get an amazing level of resolution, detail, air, and all those other audiophile attributes. Perhaps I have been fortunate not only to have decent AC to begin with, but to have chosen components that are highly immune to power fluctuations. I say all of this because, when using the highly touted PS Audio AC frequency and waveform adjustments, I have never noticed more than the most minute differences.