Hi all! I’m a bit confused on several opinions that there is too much treble response from this amp. Making some guesstimate calculation (using spec sheet on ECC82 and the reported OT winding earlier in this thread), one would expect the transformed source impedance to be ~4ohm, ie less than 16ohm nominal load. That would imply reduced response for higher frequencies (and also around speaker/cabinet bass resonance) by the typical impedance curve. Perhaps designer did consider this, but over-compensate the EQ to be overly bright?