I currently run a Shure psm 200 wireless system thru triple driver custom molded ear pieces. I know the ears can handle the bass, based on the fact that an Ipod can get super boomy in them. I believe that I am losing bass response due to the psm200. Can anyone recommend a specific brand and model that will cure this? Ive been looking at the psm 400 & 600, as well as the Sennheiser ew 300 G3. Thanks Myke