The CP-47.5 is a nice preamp but not quite at the same level as the CP-50 or CP-60. The CP-47.5 came out after the 50/60 and was an attempt to deliver some of their performance attributes at a lower price point. The parts quality and complement in the CP-47 is not the same as the 50/60/65. For one thing, if you look at the rear panel RCA jacks as readily visible evidence of this, they are made of stamped metal similar to what you find on mass market gear, versus the typical solid, tiffany style jacks typically found on Classé components. Rear panel views of the CP-47.5 and CP-65 can be found on the Classé website under discontinued models.