I wanted to start a new thread to (maybe) consolidate the groups experience with tube changes on the Genz Benz Streamliner. I have a few 5714 Sylvania (low gain) tubes on hand to experiment with. My personal goal is to roll off a little of the deep lows. I opened up my unit and swapped the tube in the second position (Bass and Treble tone). It definitely tamed both ends of the spectrum a bit. I want to play it a bit with this configuration before I move things around more. At this stage, I am wondering what others have done and speculations about what to try. Of course I could try different cabinets to work this the other way. I am currently using an Avatar TB153 nEarful type 3 way cab. Thoughts?