TFV12 Prince - T10 0.12ohms 60-120w Best between 80w to 110w TFV12 Prince - M4 0.17ohms 30-70w Best between 40w to 60w TFV12 Prince - Q4 0.4ohms 40-100w Best between 60w to 80w TFV12 Prince - X6 0.15ohms 50-120w Best between 80w to 100w