For almost one year after Audio Research decided to upgrade the Ref 210 tube Monoblocks and begin using the new KT-120 tubes, instead of the 6550's, they offered the upgraded version of the Ref 210, with the new tubes and associated electronic updates in the original Ref 210 case.
This factory made model has nearly the same specs as the new Ref 250, including the 250 watt output power and all original KT-120 Audio Research tubes.
Bias adjustments and power output monitoring is simply done with the original led panel display from the Ref 210 design.
These amps significantly improve on the sonics and power output of the original Ref 210's.
Much more bass control and midrange clarity, as well as preserving the "air" that ARC is rightly famous for.
These amps are not quite broken in with about 325 hours on the original tubes (ARC suggests 500 hours as optimum break-in). Perfect condition cosmetically with all original boxes, manuals and remotes.
I will sell these amps for $ 13,500 - and I will pay shipping and insurance to CONUS.
You can have nearly the performance of the newest Ref 250 (retail is $ 26,000) for over $ 11,000 less.
You are welcome to call me with any questions - 435-635-2780.
I am not a dealer and have a long and perfect history here on Audiogon.