Which "steaming" monoblocks & speakers if I may inquire? Love the sound of those 300B's, watching the Westinghouse factory re-re-startup with interest. I use my Cary CAD-300SEI w/CAD-300PB capacitor bank mostly for cans, even though I got it for room speakers.
Edit... just saw it above in this discourse, thx.
Sharing here, as you, as I also believe you need to hear the actual shit hooked up with electrons flowing and air moving your organ of corti; as in it is fine to run the numbers and check the specs, but in the end is it "life" ??
Current rig; re-constituted extra virgin electrons siphoned from the Sacred fire of Vesta, i.e. a double-conversion UPS > pachyderm power cables > DSD-Audivarna-PC > USB/ Corning Optical-Gemini/LPS > Denafrips Ares > Oyaide AZ-910 > Cary CAD-300SEI w/PB300 > Silver Dragon > Focal/MD Elex's. Every link in the chain... plays... I have also just started listening with a pair of HD600's off eBay that are very early "vintage" 600's, liking the sound of these higher ohm cans, Elex's still fill in the lower side better,, would very much like to trial the HD800S & Utopia....