rshad0000 OP
I was really impressed with the laid back presentation and nice warmth in the mids. I’ve always been a solid state guy.
Your spearkers impedance v -phase angle graph. Very hard to drive for any tube 60hz to 150hz.
https://www.stereophile.com/images/417FSop3fig1.jpg
Your Octave amps frequency response (black line) into a much milder (compared to your Focals) Kanton simulated speaker load.
https://www.stereophile.com/images/917octave.Oct80fig01.jpg
I predict you’ll tire of this sound very quick and go back to the Diablo 300.
Cheers George