I've been wondering, do manufacturers tinker with the internals of a specific model over time without launching it as a new model. The reason I ask is because I've been looking at a Cyrus X Amplifier and its cheap enough to buy without worrying if its a mistake after it arrives (e.g. if I dont like the sound). The seller says its about 5 or 6 years old so I was wondering how it would sound compared to a new one. Also, is it possible to send it to Cyrus to be 'updated' if they've changed components?