So I spent a significant amount of time on the phone with Carvin today they have a new system similar to the RCF EVOX 8 that is available with an 18 a 12 or a double 10 sub box which would you choose and why, and please don't turn this into a don't buy Carvin post. It's been a while since I've used their stuff, I had forgotten how incredible their customer service is. The new stuff is top notch gear as the service is unbeatable