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

khragon Meant to ask what pre you have in front of the SIT-2?

Would an 300B amplifier with the following specs be suitable for the Nenuphars?

10W per channel
Damping Factor 10 at 8Ω load at 1kHz
-6dB of negative feedback

Khragon, did you ever compare Apherion with the Townshend? Thanks.

I am using a full PS Audio stack:

P15 Power Regen
DSD DAC Sr
BHK Pre

I used to have BHK250 amp buy sold that in favor of the SIT2.

Sorry I didn't compare the Aperion to any other brand.  I did compare their TOTL model the dual AMT to the lower aluminum ribbon model.  I think I could live with the aluminum ribbon model, they were very close.  With exception of the sensitivity so for maximum compatibility later on I went with the AMT, that and I thought it's a bit more airy.. but that could be the price bias taking.

@yorkshireman, 
At 10 watts I'm assuming that this is a SET amplifier utilizing a modest 6db of negative feedback (Many SETs are zero negative feedback). The damping factor is pretty modest as to suit the Nenuphars (Per design objective). I can not anticipate any problems with this amplifier. 
Charles