If you like the sound of the IER-Z1R but want better technical performance, the upgrade would be the IER-M9.hi all I currently have ier-z1r and looking for some real upgrade. is dc ti or creator a good choice? are they real upgrade from the sony?
what different between dc ti and creator other than creator whole body is ti?
Sonys sound signature is unique, if you change to FitEar, it will be different sound signature, that's for sure.
So it's more a change than an upgrade