i was thinking the same but this guy is trying it sealed. Translate the post #332 if you want. He is afraid if he unseals the sub, he will have bass out of control.
it is sealed vs sealed. Xtz is a hubrid subwoofer it can do both!
so the graph you see its just a warm up of the xtz
.
also this is 12.17 “edge“ the one i picked too. There is a 12.17 single, also.
That moment there is a promotion that edge is cheaper than the single 12.17. I think its available at the Usa too, there is a chain.