I am trying to change up my girlfriend's setup in her Scion TC. Right now I have 2 RF P212D4's in a 2 net cube sealed box with a Diamond D3 400.1 pushing them all that is running off of the stock HU and convertor, she wanted everything kept factory. However I was wanting to change it up a little bit, she is happy with how it is but I want to give her options. I was wanting to try 2 ED EHQS 12's ported on the Diamond 400.1 but I have heard that they need more than the 2 cubes ported that ED recommends, I was wanting to know who has ran these in a vehicle in a ported box with 400 RMS and how big of a box do they need to get the most out of them. The other box I need help with is for a RE SX 18. This setup would be temporary just to see if she likes it, she already thinks the 2 RF's are too loud so she probably won't like it but what is the minimum space needed for a SX 18 ported? And I am talking net volume on both of these. And with the 18 I need minimum space just to get it in there and let her hear it. If she likes then I can do something else with it.
Thanks in advance and sorry for the long post, I get carried away sometimes.