Mrtennis-
When making evaluations with more than one unknown parameter, e.g., new speaker and new recording in a new system/room, one cannot determine what accounts for all the discovered sound differences. It is a mathematical/logical impossibility.
Even if you play 5 different (unfamiliar CDs) and they share the same characteristic, you can only ascribe that characteristic to the system if you know (and you don't, of course) that those recordings do not, in fact, share that characteristic.
Kal
When making evaluations with more than one unknown parameter, e.g., new speaker and new recording in a new system/room, one cannot determine what accounts for all the discovered sound differences. It is a mathematical/logical impossibility.
Even if you play 5 different (unfamiliar CDs) and they share the same characteristic, you can only ascribe that characteristic to the system if you know (and you don't, of course) that those recordings do not, in fact, share that characteristic.
Kal