I have a couple of questions. I use the Riva901 with LR atty's. A friend was going to order one but they were out of stock. She's thinking about the 1100 but I noticed it's a reg 510 atty. What is the voltage on the 1100? For me I don't think you get the same type of hit with a reg as you do with a LR. Could she use 510LR with the 1100?