Anyone have any experience with this planar-piezzo drive combo .my experience with piezzo was with spring was model and they have names for models with whole year spring summer i can't remember name of the brend but they have a good IEM with large DD 12m for bass and depnd for models DD or BA drive for mid and always piezzo for high fricvence and it was a bit too much i first time but they are solving the problem with it and the last model was great and planar can be the most capable to deliver so good sound and probably the most important thing is the hendl weith good heat menige because they are so hard to destroy them only the heat they produce when working hard can be problem and when I summer my experience with both drivers I must have to be careful with both it without any word from someone who has pair and put it in . anyone?