My system evolved over decades. I began building single-ended-triode amplifiers before the turn of the century and learned more about it over the years. In 2005, having two MS degrees I enrolled in the new interdisciplinary applied mathematics and mathematical physics PhD program in Delaware State University and graduated in 2009. (Feel free to check DESU if you wish to verify my diploma.) For years I thought it would be fun to build an 833-A amplifier and when I discovered how much I preferred planar speakers to cones in the box I had a dilemma. The Magnepan speakers require more power than the 245 SET amplifiers could give, but I like the romantic sound of SET. I had read of the WAVAC 833-A stereo which costs $350,000, more than I could afford. I read some things about how it was designed and even if I could afford it, I would rather have the 833-A grids driven by the sweeter sounding 245's than the KT 88's the VAVAC uses and even though the WAVAC uses modest voltage for their 833-A's the way I do, they add positive grid bias to get more power out of it and by running it harder than I need to run my design they must have a shorter tube life. The 833-A at zero grid bias puts out more than enough power for the Magnepan 0.7's in my small house. Because little is demanded of this mighty tube, it is never pushed hard enough to suffer enough distortion to approach anything I can hear.

I did not include the rectangular solid dimensions of my listening room because I live in an oblate spheroid shape house which is 26 feet in diameter.

My 833-A amplifiers including making new 245 drivers out of my existing amplifiers cost less than $2000 to build and even if I coveted the WAVAC, which does not have the Jules Verne look to it I gave mine, that I got what I prefer over the WAVAC at a fraction of a percent of the price.