Living voice and kondo

For ultimate drive performance, I do recommend folks here to try pairing the OBX-R2 with a 50w SET,
such as KR Kronzilla SX, to undestand the speaker full potential with all kind of music: drive ,stage,authority and energy from hell combining midrange from heaven.
Although this match must have a very liqiud full bodied source (prefered analogue & tube phono) since the KR has a very neutral balance.
But there are some good 845 SET/300B PP that will drive them very good as well, but again, this speaker deserves the best cables and source to full potential- they are more sensitive to that then other designs on the market

Ef227,I am using Kondo copper speaker cables and resolution audio CD player,by good 845SET/300B pp amp which you mean

I'm using a Luxman L560 50wc Pure class A amp with my LV Avatar 2's with great results so don't rule out a good SS amp preferable class A. I also have some Welborne labsDDR45's mono's that sound great but not nearly enough power unfortunately (2wch haha) but I do prefer them with the tubes but there is good SS out there that will make them sing.

Audio note UK is good but OBX needs over 25w
Ankoru is good

Kondo overture EL34 is also good