"WHAMMY" Pass DIY headphone amp guide

All buttoned up and singing on my desk at work. Sounds great with my Thinksound On2's. I did end up swapping the transformer to 18v secondary version of the Talema. Much less heat from the voltage regulators and no detriment to sound that I can tell. Love this HPA!



 
Here is my first Pass amp, learned a lot here. I've tried a few OPAs and finally settled with AD823 so far, will try OPA627 X 2 soon, this amp sounds amazing 🙂
 

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