Be careful here, Chris. I do believe that these devices such as the one Hagerman builds has a circuit board that connects between the CPD and the inputs on the phonostage to drop the signal strength many fold. This is to prevent severly overloading the phono stage circuits. I prefer just playing records to burn stuff in, but if you want to speed this up with one of these CDs, that't fine. However, do look into purchasing one of the products mentioned in the original post.
Phonostage Burn-in to keep unit sharp
There are phonostage burn-in products out there (KAB, Hagerman, Thor) that utilize your CD player. Most frequently these products are used to speed up the break-in process of your phonostage. But are they worthwhile to use every month or so to improve phonostage performance? I was told doing this is akin to driving your car on the freeway to blow out the carbon. I've yet to buy a burn-in unit. Do you think they are worthwhile?