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

"Looks like the amps with 2a3 tubes are 2.5 watts/channel. Is that enough to hear at sane listening level, assuming you sit 8-9ft from the speaker?"

For my "sane" levels it would be, but it also depends upon the size of your room. 20-40 sq meters is 215 to 430 square feet (20' x 20').

From the Cube Audio website:
"The Nenuphars are dedicated for rooms of 20 - 40 square meters. They are a perfect match for a tube amp with at least 3 Watts per channel. Our personal preference is somewhere around 2A3, Px4, 45 tube-based amps. Nonetheless, most solid-state amps (especially those working in A-class) are also an amazing match for the Nenuphars."

"I bought my SIT-1 Mono's (Demo's) for about $500 more than what the SIT-3 goes for new."

That sounds like a great deal. Didn't they sell for $11K when new?

"I found independent power supplies for each channel to be a very substantial upgrade when I did it for my first watt f4s. I think I've said this before too, but it's a really beautiful amp that doesn't get the attention it serves, btw."

I remember reading the 6moons review of the F-4 years ago and thinking they would be perfect if one had a preamp that they loved.

- Robert

And since everyone should love their preamp...

Preamps are sometimes under-appreciated, with more time being focused on amps and speakers. It may have been Robert Harley who wrote that the amplifier determines the character of a system while the preamplifier determines the quality.

- Robert