Im curious as what to look for in Winisd... the low end extension sux on the graph. Im seeing big differences in how it looks vs ported and the center peak is crazy high. I suppose I should learn BB6 myself as I've already got it installed on my computer. I've been learning Sketchup lately now comes another headache!That would prob work. I can check it in BBP after work. I was surprised how small of a sealed chamber these subs want.