[holland]

Too much gain for headphones.  You're better off getting custom transformers too, for the needed impedance.  It's better to build a circuit specifically than to try and take a generic kit meant for speakers.

 

[Tjj226 Angel]

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Too much gain for headphones.  You're better off getting custom transformers too, for the needed impedance.  It's better to build a circuit specifically than to try and take a generic kit meant for speakers.

 
Nah, you can add some resistors in and it will work just fine. That is how my current amp works. It is a full blown speaker amp, with an adapter. It works with anything from ATH-AD700s all the way up to the LCD2/3 and HE-6 

 

[holland]

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Nah, you can add some resistors in and it will work just fine. That is how my current amp works. It is a full blown speaker amp, with an adapter. It works with anything from ATH-AD700s all the way up to the LCD2/3 and HE-6 

It's a waste of power when the bulk of current goes through the resistors.  It's a hack.

 

[dBel84]

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Better ones exist. 

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My friend and I just finished a 350B amp fed by two 6SL7 tubes and it sounds a heck of a lot better than the EHHA. I have a little speaker amp to headphone converter and it makes my HD600s sound super warm and lush. 

 
have you ever stopped to consider that "better" does not equate to " super warm and lush" to everyone . The EHHA is a fast and dynamic sounding amp which is able to deliver a real world punch while maintaining control of the driver. While I agree that there are amps out there that can do this too, I would not call any 300B which can be built for less than $1000 one of them. To get a DHT circuit to sing , you need expensive OPT and attention to your power supply - ~ $2.5K would be a better estimate with careful part sourcing.