- ECC32 has 950mA filament vs. 600mA for the 6SN7
- ECC32 is rated with a Mu of 32 vs. 20 for 6SN7
- ECC32 is rated for a max plate voltage of 300V vs. 450 for the 6SN7.
The difference in gain is substantial (over 50% more voltage gain) and will certainly make the amplifier's input more sensitive - which may have a negative impact on total distortion. Considering the high absolute voltage differential in the MA-2 driver section (over 800V, though during operation the device sees half of this) I'd be a tad shy about plugging in one or more of these spendy NOS devices. This said, the 6SN7s are bulletproof in this amp.
All in all, I think this is a good tube to _sell_ ;-)
