- Aug 6, 2010
- European Union
The drop in impedance and increase in sensitivity at the same performance level is pretty huge. I went from ER-4S to ER-4XR and I'm happy with my choice, since I don't need an amp.
The impedance of the ER4s, never really bothered me, simply because I am carrying a portable amp with me most of the time. In the the rare cases I do not want an amp, I still had the ER4p to fall back on.
I still do think that around $300 for an 'upgrade' is quite a lot, as for the same price one could purchase products which better complement the ER4s in ones collection.
Are the (sensitivity-independant) sound improvement that big? It don't seem to catch is from the previous posts in this thread.