lemon80. Dual coil tends to give more flavour and typically more vapour. Only real downside is it vapes through your juice way faster. The other pain with them is that each of the coils must have exactly the same number of wraps. Importantly your coil resistance is halved. So if you made a coil that had something like 10 wraps (depending on thickness of wire used etc) and came out at 1.0 ohms, when you make the second coil the same the final resistance will be around 0.5 ohms. The only atties that I like building duals in are the Vulcan and the Tobh. Everything else tends to get a single coil. Mainly because I want to vape right away and as a lazy git I find dual a lot of faffing about.
Airflow and coil position is extremely important. In the Magma as an example the airflow is on the deck and hits the coil from underneath like the Kayfun. If the coil is positioned too high above the deck the coil gets hotter because the air has further to travel and is not cooled as quickly. In the Veritas the airflow is completely different again and actually hits the coil from behind it. Every Rda is different and you have to spend some time experimenting with them. The more airflow you have the more vapour produced but too much airflow can also result in loss of flavour. Ideally you want to be buying something that has adjustable airflow, most new rda's do it's just some of the earlier designs that are restricted.
The design of the airflow holes also plays it's part. A cyclops style slit air hole tends to let the air hit the whole length of the coil as opposed to single hole designs that hit it in a radial fashion.
The design of the rda chamber can also greatly affect things. Anything with a reduced chamber design is going to give you better flavour. Off the top of my head ones that have this are Veritas, Magma, Quasar, Tobh, Zenith V2. Plume Veil has an adjustable Delrin chamber reducer. But there are loads more that do.
After a full day's use on the Plumeveil I'm not 100% certain I would suggest it as a first time rda. It has a lot of airflow options. In fact too many of them. It even has airflow that comes through the negative posts. Plus there's the delrin chamber reducer you may need to faff around with. It has a spinning centre post and a split centre post block. Might be confusing to a first timer. I also haven't put enough different type of juice through it to say for sure whether the flavour is consistently good. I am impressed with the vapour produced but as a mainly flavour chaser I'm not sure if I'd regularly use it yet. As for the web logo I absolutely hate spiders and have convinced myself its not a Huntsman/Black Widow nest and is merely a little doodle left by a well known and witty superhero.
Anyway far too much info for you to absorb I just thought I'd put it out there.
