There has been some discussion on these amps elsewhere on AK, but I believe they deserve attention in this forum, as they do represent a tremendous value. A bit of background, Dennis Had was the founder and president of Cary Audio. He designed several of their highly regarded products. He retired from Cary a few years ago and is now hand building his own designs out of his house. He has produced amps based on vintage Magnavox amps using EL84 power tubes, single-ended amps tuned to use 6V6, 6L6, EL34, KT88, and more - some triode, others pentode, some designed for higher output, some with two or four tubes per channel in parallel single-ended mode. He has customized amps per customer spec. He has recently redesigned his power supply to incorporate new concepts. His output transformers are hand wound and custom built to his specs.
I own two of his amps. One of his older EL84 amps (which I believe he no longer builds, perhaps per custom order?) and one of his high output (HO) amps with 20 watt output transformers. Both of them sound fabulous. Incredibly open and natural. Sounding as good or better than other single-ended amps I've heard which cost several times what he asks ... which is typically $1200 to $2000, depending upon the configuration. And as the HO amp supports 6V6, 5881, 6L6, KT66, EL34, 6CA7, KT77, 6550, KT88, KT120 and KT150 power tubes, it is great fun to roll various tubes and listen to how they affect the music.
The Audio 10 blog just published a review of one of his amps.
http://www.10audio.com/inspire_fire-bottle.htm