Some people think that a particular tube is a greater factor in the resulting sonic characteristics of an amplifier than the circuit in which the particular tube is employed. Other people think that the particular circuit in which a tube is employed is a greater factor in the resulting sonic...
I was happy to see finally in person the awesome NAT Magma New SE SET amplifier. As far as I know this amplifier, with an output of 170 watts from one GM-100 tube, is the highest power, single-tube SET amplifier available today.