The four subs I have had thus far have all been ported. I am strongly considering a DIY sub project and I was wondering if any of you had any strong preferences in the sound a sub puts out with ether application for venting. I know one of the pros using passives for venting will enable me to reduce the dimensions of the enclosure but what effect "if any" do adding passives change the sound? This sub would be used for basically 100% HT. Any preferences out there? Are there any pros or cons in sound in ether application?