After a quick test everything seems to be connected fine, i've got a good signal and the ER4's suddenly seem much harder to drive, as expected.
Now there seems to be some changes in sound signature, the lowest extensions of bass seems to be better and works very well along side the mid bass. Dynamics are great as they always were ...always relying on the weakest part of the chain whch is the source material.
Now the main obvious gripe for me was very apparent from the start, notably rolled off highs. The ER4p's were the first IEM i had that didn't seem to lose extension in the treble department yet suddenly these are now compable to my e2c's. Either i've done something wrong or this is a common thing?