Depending on the topology:
GM70 SE : 25-28W
Freq. response : 17Hz -42Khz
GM70 PSE: 50-55W
Freq. response: 22 Hz -38Khz
Sensitivity, inputs, automatics, enclosure finish - chosen by customer
Simply - we really like working with GM70 triode.
So strong, so transparent, so.......... hot !
In SE DHT topology has enough output power for everyday use, in PSE provides enough power for less sensitive speakers and larger rooms.
When recognized 2a3 tube sonics is transferred to the powerfull triode output stage, you must a cower.
Because our customers want something special and beacose we like to make such devices, our prices is - enthusiastic. Still...