The Sansui B-2101 is a great analog amplifier. They are over 30 years old and sound amazing. I own several of them and I personally believe that they are the best buy for your money today. They are getting extremely hard to find and the price seems to have escalated with so many people looking for great 70-80’s analog audio gear. I give these amps and their respective preamps the C-2101/02 a strong thumbs up. You can buy power as they deliver in a Class A/B today but the entry price in the market is several thousands of dollars today to get anything that is remotely comparable.