Ok, tks so much for enlightening me, I didnt know the schematics were nonexistent. I wont be able to attend CanJam unfortunately so the EHHA-2/Stacker comparison will have to be covered by others and guessed upon from myself
If there are any builders for this EHHA-2 (match made in heaven for LCD-2) Id be very interested in knowing about it.
Damn quoted reply doesn't work for me... Really having a hard time seeing how the H-F is an "improvement." But I digress...
There is one EHHA-2 in existence, and it belongs to Don. I'm not sure if another will make it to CanJam or not. One Liquid Gold exists and belongs to Pabbi1. It will at CanJam.
The CTH would be able to drive the LCD-2s, EHHA kits are still available, though it was designed around the 6GM8 tube so other tubes that work at the lower voltage are tricky to apply.
To be fair, Don, Sachu and I have taken the Cavalli Audio "Redpill", so we're probably a little biased (pun intended) towards his designs. Other designs that would be a good fit are DEKWARE's CSP2 and the Aikido 24V Hybrid. The 24V Hybrid is a rare bird and I haven't tried JB's new headphone amp as I'm having too much fun modding the 24V to run at 75V with either 6GM8 or 6N23Pi tubes. A FirstWatt F5 will certainly be capable of driving the LCD-2s, but it needs a new PS to get noise and ripple down to acceptable levels, plus resistors on the positive leads to the TRS jack to prevent bad things happening to the F5 if the cans are unplugged when the F5 is powered up.