Not on my H/K AVR 430. Well, maybe. You did say a pretty good job. A $45 Radio Shack job made all the difference in the world to me. As far as I'm concerned that is the cheap fix and I picked up a cheap calibration disk for $10 o ebay. I'm sorry I did that, as it only took money away from a $40 Avia. You wouldn't put cheap spark plugs in a fast car, would you?