I'm testing the Torpedo, received in a box with the built amp and 5 pairs of different matched tubes (ready to roll, wow). The sound is clear, a very neutral and warm signature.. could be a bargain but only if you own low impedence gears, definitively wrong with dt880/600ohms Maybe will be excellent with the 32ohm version and luckily work very, very fine with my Ms1i Alessandro (!). Imho there will be a lack of power with the dt880 250ohm, 'cause most of the time I keep the volume at 15:00 with the 32omhs Grado.
So, i'm starting a new quest for a dedicated 600omh amplifier.. just waiting for get the money. But this time I would be sure about the "power output".