I'm using a Shertler DYN-G with the PRE AIII preamp, and when I run direct I find that the sound is fairly good. However, running into an amp, I'm not all that impressed with the sound. I've tried some different amps....Fishman, Acoustic Image, an older Crate, etc....never tried any of the Shertler amps though. Can anyone relate any experiences or share what amps work the the best with the DYN-G? I would greatly appreciate it.