Artmaltman,
As I understand it, and audiogoner "Newbee" might be better at explaining it, the symmetrical structure of a vacuum tube allows for addressing two distinct signal paths. In the case of the VP-129, one would have to count on a high degree of structural symmetry between the two halves for channel balance.
As I understand it, and audiogoner "Newbee" might be better at explaining it, the symmetrical structure of a vacuum tube allows for addressing two distinct signal paths. In the case of the VP-129, one would have to count on a high degree of structural symmetry between the two halves for channel balance.