I am riding at 22 MPH, with the 1900 lbs of ballast approx. 70% full, wakeplate at 1/2 way, and rope length about 65' and the wave is awesome. I have had a few different riders on my boat in the last couple weeks and all are very satisfied with the wake, hits me above my knee and rampy. It will launch you. Most adults beginner-intermediate are riding 19-22 in my boat @ 65'.
I do have my kids riding at 16-19mph, they are not even using the ballast system right now. This is a little safer speed, and makes the falls a little less painful.
White/Charcoal, 2011 VLX
2008 Supra 22SSV