Model 10 --------------------------------- Tone May 2007 The Absolute Sound Stereophile April 2000 Hi Fi Choice November 1999 Model 20 --------------------------------- TheCriticalEar.com March 2006 The Absolute Sound February 2003 Hi Fi Choice January 1999 Model 20/12 --------------------------------- HiFi May 2007 HiFi + HiFi News May 2006 Model 30 --------------------------------- The Absolute Sound June 2005 Stereophile March 2003 Model 309 --------------------------------- Hi Fi Choice August 2003