I let my speakers play music for a week straight at low volume. I think during that time they did open up more, got more detailed, more layering and more coherent. I'm sure a lot of that was me getting use to the new sound but at the same time I was changing my speakers location some to get them setup correctly. I found that in my room if I positioned my speakers to cross in front of me it sounds the best. Any other position I tried was just like i was moving the sound of the tweeters around. When I got the speakers set where they cross in front of me it unlocked all the midbase and midrange. It's just sounds much more natural in my room this way. I have had the speakers setup this way and several other ways before the upgrade. I have said all the positive things the upgrade had done i other posts on here and after hearing the difference for about a month now I still feel the same way and probably more so. This upgrade is well worth the time and cost if you have a system that is being held back because the T-Refs are not as good as your system. It takes a very good system to hear all the good things that come from this upgrade. But if you have that system you will be greatly rewarded.