Tube amplifier for headphones

[heavil]

Hello! I would like to build an amplifier for headphones. I've found several popular schemes in the Net:
LONE WOLF BLUES COMPANY
HeadWize - Project: The Morgan Jones Mini Tube Headphone Amplifier by Chu Moy
DIY 12AU7 (ECC82) Tube - IRF612 MOSFET Hybrid Headphone Amplifier
Which of these schemes will you recommend for optimal work with headphones with resistance of 32 ohms?

[tedmich]

all fine products, I had always been attracted to Pete Millet's Jonokuchi headphone/mini-speaker amp
Jonokuchi desktop amp

custom transformers at Edcor
EDCOR Electronics Corporation. PM-101

pcb on ebay
DIY PCB - "Jonokuchi" tube headphone / speaker amp | eBay

there are MUCH cheaper kits from HK but this one is very good

[heavil]

Is the transformer circuit will sound better? The transformer provides the most distortion.

[Steve Conner]

32 ohms is low for headphones. So a transformer circuit will work better than an OTL.

If you are concerned about too much distortion, don't use tubes!

[heavil]

Why 32 ohms enough?

I work with a conventional vacuum-tube amplifiers, and, if possible, try to remove all the components that increase the distortion. Of course, in an amplifier that runs on a powerful sound system, you need a high output transformer. But the headphones require a small power output. Do not have a transformer and is better than high-quality condenser?

Or build a circuit with transformatorm, and a friend - no transformer and compare them. Did anyone right?