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

@cal3713 interesting thought. There is no question that a separate power supply on each channel can make a substantial difference depending on the original power supply design. I haven’t seen the inside of SIT-3 but if there is enough space inside, you could install the 2nd one in the same chassis and rewire into a dual mono configuration. You would then have to recalculate the fuse rating (if it has one) and drill another hole for the 2nd fuse. It’s another option for someone wanting a stereo amp and saving real estate :-)

If one had two SIT-3s could you turn them both on and run the right channel from your preamp to one and the left channel through the other amp? One amp would then drive the right speaker and one the left.

@rwpollock Definitely.  The idling board of the unused channel does (in my experience) still create a little extra distortion though, so if I settled on that solution, I'd eventually disconnect that board from the power supply. If a friend had a unit, your method would be the easiest way to see what the benefit would be.

Speaking of Tektron tube amps, they are the 2a3 amps used by Cube Audio at shows. Robyatt Audio carries four of their smaller amps/preamps.
www.robyattaudio.com/TektronProducts.htm
I may purchase one this winter to check it out.

- Robert

Speaking of Tektron tube amps, they are the 2a3 amps used by Cube Audio at shows. Robyatt Audio carries four of their smaller amps/preamps.
www.robyattaudio.com/TektronProducts.htm
I may purchase one this winter to check it out.

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 ? What about 300B tubes ? has anybody been able to listen to a 300B amp with the Nenuphars ?