I don't know about AGC, but I posted this in March....of course, that was prior to the latest FW which "enhances" the bass, so YMMV. I have not downloaded FW updates in a while (I'm three versions behind and not feeling any pain for my style of operation). http://mailman.qth.net/pipermail/elecraft/2008-March/085550.html de Doug KR2Q