Doing this trick don't forget that lifespan of rectifier tubes in general is massively shorter then output tubes as they work at their 100% non stop while output tubes in all Lampi DACs work at fraction of their capabilities so they'll live a very long and prosperous life .
And do not EVER pull out output tubes while DAC is ON - ever.
Wish I’d known about SS rectifiers. From my experience, I’d go a step further in including rectis in not pulling tubes live. In fact, with my Supratek preamp, if I don’t wait at least two or three minutes after pulling the recti, power switch off, it puts out a sound like a large explosion on restart. Scary. I read somewhere recently that for internal tube wear that it’s best to let the tube cool for about five minutes before pulling, but I don’t know if that’s true.