Good News, John Broskie has more boards in stock for the subline 9 Pin All-in-One Line-Stage Headphone Amplifer (see link below).  I've built one and it's the best HPA I've heard, though admittedly I kind of live in the wilderness and haven't heard much else other than a 15 year old Headroom and...

I'm going to build a 24 volt Aikido using the recently released Aikido LV board with off-board headphone driver duplicating the circuit in your 24 v.   Question: How hot do the heatsinks get on your 24 v?  I'm just wondering how much heat sinking I'll have to provide.   I've just...