I ordered an A6 rda from health cabin and it's not hitting like I expected. It came with a 1.8 ohm coil and the vapor it produces is not very much compared to my 306s or 510s with the same ohms. I've measured the A6 and it does measure around1.8. I've also tried it with my ego and sigelei and the outcome is the same. This my first rda and wondering if I'm missing something?