I have owned a 2150B for over a decade now and it is a fine amp for what it was designed to do. It is rated at 200/wpc of MOSFET output power and has good headroom and can drive virtually any speaker load. I originally bought mine to drive Acoustat 1+1's which can occasionally dip into the 2 ohm range. The amp performed effortlessly at all times and was/is very reliable. When the 2150 first came to the states it was reviewed by The Absolute Sound and was basically touted as one of the best SS amps they have ever heard - EXCEPT for a midrange glare problem that the reviewer attributed to the amp's circuit protection circuitry. This protection circuitry was subsequently removed from the "B" version of the amp (which is the model you are inquiring about). While I don't doubt that Plinius amps will outperform the 2150B as stated in another post, that is not comparing apples with apples. The 2150B is an older design and can probably be bought for somewhere in the $400 - 700 range depending on condition/box/manual etc. The Plinius amps are much more costly - even used. While the 2150B will not afford you the last word in resolution, it is an amp with no real weaknesses either. It is extremely powerful, built like a tank, and represents superb performance/dollar (even at it's roughly $1,400 retail back in the day). I hope this information helps you and feel free to contact me if you have any further questions. Best Regards, DaddyO
