To the old salts and pros out here, havin' a bit of an issue... I just got my hands on a Hartke HA3500a and have a bit of a problem. The DI is producing NO volume whatsoever and is so quiet that one can barely hear it through our Fostex recorder/mixer. We tried everything. To make sure it wasnt the board we tested a couple other bass heads and they worked just fine. Changed XLR cables 4 times. Nadda. I have no volume control at the HA3500a whatsoever into the Fostex. I do have it (yeeeeah buddy) in the open. We tried this with the cab plugged in and unplugged and still no good. Otherwise the head seems to be acting perfectly fine with my Peavey 115BX BW cab. My original rig was a Peavey Firebass 700 which I loved but finally bit the dust. Versus getting it fixed up I decided to downgrade (which turned out to be an upgrade). I sent an email to Samson but know that somtimes the real-world players are more accurate with the answers. Can anyone give me some direction with this? Before I roll out with the head to the local music shop I hope to be armed with sme truths and facts. Many thanks I am quite impressed with the head thus far and showcasing the tube pre-amp did wonders to my sound.