Quote: Originally Posted by doulos30 I've modded 2 of these units. The frequency responce does improve when you change the opamps. I've beaten the rme specs across the board with my units. This is a solid piece from behringer and on the graph if you look the diffrence measured is .1 db if you can hear changes of .5 db id be amazed. In this unit changing the output opamps only improved crosstalk specs. The input stages are really the only concern. I switched to a smd tle2072 type chip and the unit cleaned up very nicely. doulos30 Could you show frequency response plots after/before mod ?