I hope break in is true

My experience is that this type of disc can benefit components at line level along with those operating at amplifier output / speaker level. As mentioned, i've used this on digital sources without signal making it to the speakers and i've always been able to tell / hear the difference as a component "settles in". Obviously, the more of a "work out" that you can provide for the entire system, including the amplifier / speaker ( without damaging them ), the greater the potential for differences in performance.

I have used this disc many times over on systems that have hundreds / thousands of hours of use on them. A short period on "repeat" is what i would recommend. In my opinion and those that have heard / experienced the differences before and after, the results were always worth the limited amount of time, effort and money involved. Sean
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I must echo Sean's warnings about audiophile break-in and (especially!) test CDs. At high volumn they can do damage and I blew out a set of new super tweeters when running such a CD at high volumn. Only then did I read the instructions "do not use high volumn..."

Mdhoover: I agree with Sean and Unclejeff. A disk like this will benefit without the amp on, or with the amp on at any reasonable volume. I would recommend amp on at a normal listening level.

Sean, Unclejeff et al,

OK, so where do I get this CD?

So far, you have a choice of Ayre or Granite Audio. I suggest you look at their web sites where I'm sure you can order one.