Most transparent power amp

Currently, I am loving the Job 225 and Job Pre2. Pound for pound a great amp. Best kept secret.

It's really interesting to me how many OTL's are listed here.  

Output transformers are often the limiting element in a tube amp, and the art of building them a dying one. The really good ones are expensive, hand-wound ones. Roger Modjeski may include transformer building in his course on amplifier design.

Nothing beats the speed of a good OTL. That's where transparency lives. You can always eq.

If you can hear a Lamm amp, any of them, they are very transparent.  I have the SET amp, and its very transparent,