Hi Ben,
My experience was the two formats both required 400 hours of burn in each. I was assuming it was due to the laser, but I may be wrong. The break-in was gradual. For a full depth explaination of what I heard, look at my SCD-1 review after modifications. It will take you through a weekly account. For the most part it opened up and smoothed out in the top end and continued to lose it's digital edge.
My experience was the two formats both required 400 hours of burn in each. I was assuming it was due to the laser, but I may be wrong. The break-in was gradual. For a full depth explaination of what I heard, look at my SCD-1 review after modifications. It will take you through a weekly account. For the most part it opened up and smoothed out in the top end and continued to lose it's digital edge.