So here is the newest member of the family. DRRI, a few years old and well broken in. I traded a Vox AC15 plus $250 for it. Not a steal, but seemingly a fair deal. It took me about 30 seconds with it to say "wow." So far really, really liking it. I have my fingers crossed, because I really liked the Vox a lot. I hope I don't regret this. Was just looking for something a bit meatier. I do have question. I will be looking to get this to sound its best at lower volume. Really, Princeton Reverb volume is plenty for the size places I usually play. So what I need is less clean headroom, and sooner breakup. this seems to be the opposite of what most people are looking for. I have done a good amount of research on swapping tubes and speakers to achieve this. The FenderGuru site had some good info. So I am looking for you guys to confirm and clarify. Current speaker is stock jensen C12K. This seems to be a very efficient speaker. Will swapping in a less efficient speaker help get what I want? (I am looking for a basic versatile classic rock sound, Stones, etc.) My web research turns up a zillion speaker recommendations, with no real consensus. For tubes, this is the advice I have found: Remove V1 tube for channel 1. Replace the V2 12AX7 preamp tube with 12AT7 or 12AY7. (This one I don't entirely understand - can someone explain it to me?) Replace the 12AT7 PI tube with a 12AX7 or 12AU7. (Again, I am a little cloudy on what this does exactly.) Thanks for any advice!