It's pretty easy really. This a version of a twin triode that has been miniaturized. The original idea was that such a tube would save on power requirements vs a larger tube. It worked. In fact, this tube got popular with such people as Nelson Pass (B1 buffer), and Pete Millett, who's design I followed here. Pete sells these as kits, but the 'kit quality' is way different than you might expect. Simply put only high quality parts come with the kit, such as an extra thick circuit board and heavy traces. Best part for me is that these units will fit in fancy cigar boxes, making a perfect marriage. The sound? It's simple too. Yes, tubes produce second harmonics that amount to the larger part of the tube signature in music. So the reason to buy a buffer amp is to have a way to incorporate tube sound into your system without having to buy new tube equipment. I use this buffer primarily with digital sources and am impressed by it compared to may of the other buffer amps that I have built. This build also includes a very good power supply made by Pangea Audio. It is overbuilt, and will have absolutely no trouble driving the buffer. It is a linear power supply and very quiet too. Any questions may be directed to me, and I will gladly answer them.
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