I have a CEN-TECH multimeter. I went online to see how to use it. I followed the instructions, and I still get 18.36 on the L speaker. I tried it on the Speaker B system, and I got the same results for the L speaker. The R speaker was a little less. Maybe I should just let a tech look at it. I already have $400+ invested in this receiver off ebay, and I don't want to spend anymore on it. I think I got screwed. Thanks for trying to help me, but I am just a novice. I may try to sell it as is. Have a nice day.