I am not a techie on the level of Nelson pass or Atmapshere (still learning), but I do have some experiences of my own, using a well built tube amp, one can use almost any speaker regardless of load, if the amps are built correctly. For example, many folks like to state that B&W or Magneplanar speakers are very hard to drive and require at least 200 watts or more. The tube amps I use drive these types of speakers easily and make wonderful music. I have been on the tube rolling circus and also discovered with the right combination, I can turn off my massive 15" subwoofer as these amps deliver deep enough to not have a sub. On some really stuff, such as deep pedal organ's, well I have to have the sub on, but the slam of the kick drum is all there.
From the reports that are starting to fill in on these amps, I think that those that state that tubes doen right are great with almost any speaker load. My amps are rated to handle loads as low as 2ohms.
http://www.octave.de/english/products/PowerAmplifiers/INFO-MRE130.htm
http://www.sixmoons.com/audioreviews/octave3/octave.html
Ciao,
Audioquest4life
From the reports that are starting to fill in on these amps, I think that those that state that tubes doen right are great with almost any speaker load. My amps are rated to handle loads as low as 2ohms.
http://www.octave.de/english/products/PowerAmplifiers/INFO-MRE130.htm
http://www.sixmoons.com/audioreviews/octave3/octave.html
Ciao,
Audioquest4life