Parasound has disco'd this amp along with much of their two channel line. They were selling brand new for $1350 just a while ago. According to John Curl ( the designer of this amp ), the parts that Parasound used to build this amp and what he spec'd are quite different. Nonetheless, John said that changing two parts ( resistors, i think ) makes a very noticeable improvement to the performance of the unit at minimal cost. He is also offering these amps built to his original design specs for the price of $5000. If you would like more info on this specific amp, go to the Audio Asylum and do a search in the General Forum Archives using the name of this amp as the subject matter. John specifically mentions which two part numbers to change and exactly what brand / values to use. Hope this helps. Sean >