I believe the Carver I heard was the 350. If the 275 is same technology, it's impressive. Not only did the 350 sound very good, it ran so cool the rep could grab the output tubes with his hand. You should know if the 275 & 350 are same series by the warranty on the tubes, one of the longest in the industry due to keeping them cool.
The 350 just sounded like a good amp, it didn't strike meas obviously tube or solid state. To me that's a high mark for an amp. Adjectives like, effortless, transparent, good frequency response without anything bringing attention to any one area.
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