Cube Audio Nenuphar Single Driver Speaker (10 inch) TQWT Enclosure

Congratulations David,
I know how much thought,  research and time you've devoted to this search and decision. In my humble opinion the end result for you will be extraordinary sound quality and music reproduction in your home.
Charles 

Sounds awesome David. Congrats!

Can you remind me what your current 2a3 model is and how the new build differs?

Thank you, Charles.

@cal3713   Thanks! I'll put together a proper summary of differences, etc. and get back to you.

Some high level differences: 2 chassis vs. 4 chassis. Copper vs. Silver wiring. Different output transformers. AC heating vs. DC heating. Etc.

Here is some information on my current 2A3 amp, courtesy of What's Best Forum:

https://www.whatsbestforum.com/threads/found-music-2a3-amplifier.4279/

Great, thanks. I've been following Mike's speaker journey recently, so this is great context.

David,
That link you posted brought back pleasant memories . Mike Lavigne bringing the Found Music 2A3 SET mono blocks to my and other audiophiles attention. State of the art design and built quality to implement by all accounts an exquisite sounding amplifier.

Now this will be taken to the next level as an all out assault 4 chassis amplifier with even better output transformers, separate power supply chassis  per channel. The Nenuphars will extract every bit of performance these amplifiers have to offer. Very exciting times ahead. This will be fun!
Charles