I have a friend that owned a N.E.W. DCA-33 class A single-ended battery powered solid state amp (boy, that was a mouth full) that is as close as I've heard to a tube sounding solid state amp. He recently bought a N.E.W. DCA-66 amp that has twice the output of the other model, and sold the DCA-33 to me. I have not used it in my system yet, which is ALL tube, but plan on comparing it to my amps sometime when my schedule permits. The amp comes with a battery box that holds four 12v batteries and has a charger built in. The output is 33 watts per side and sounded much more powerful than that on my friends Silverline 90db spl rated speakers. N.E.W.(nirvana electric works) is no longer in business, but you can have it serviced by Cary Audio who had something to do with the original company. I see them come up for sale from time to time for around $400.00, I belive the original price was around $2000.00. If you come across one you should check it out and see if it does as I say.
Good Luck, Tish