When I first put them on, the first thing that struck me was the midrange. Also it was so overwhelming at first. It was very forward. So I started the burn in process. It has tamed a bit now.
Because it overwhelmed the rest of the range it was difficult to guage the bass and highs. But they are already starting to bloom. The one thing with burn in is that the midrange mellows out bit more. But I want the bass to remain the same. I was listening and it sounded nice and crisp. For a high end phone it has a bit of bass impact. I don't want to lose this aspect of the phone. I find most high end phones to lack the bass impact but have good detail in the bass dept.
It's faster sounding than Grado's or senns but not as fast as Qualia's, he60's, Sa5k's etc. I quite like this pace. The listener placement is similar to Grados I find, it's more closer to the front rather than the middle or towards the back of the performance.
I am currently using a SS amp to burn them in. I will switch it to tubes when I feel enough burn in time has elapsed. Altough I have a sneaking suspicion that it will take a while.
It kinds reminds me of the Ps-1's. If you have never hear the Ps-1 or Rs-1 and first stick them on then the bass will overwhelm you. In this case it's the midrange.
There is slightly more detail over the Ps-1's. I was listening to tunes via my laptop using the l3000's. I heard a distortion and thought the drivers went belly up on me. I then plugged in the Ps-1's and when focused on it, I could barely make it out on the Ps-1's. But I could hear it on the l3000. It turns out some my ripped music have distortion of some sort.
I don't know if detail levels are affected by burn in as highs, midrange and bass are, but I prefer them not to increase or recess. I prefer it at this level.
I hate burn in....