yeah i know, is there anyone here who can help me on those tricky things, I probabaly can build 1 if only I hve the necessary infoaDo you mean sealed vs ported with a horn? I personally like a sealed 210 with this amp, but a horn would help with the highs since it doesn't have a ton of brightness, even with the treble dimed. How are you going about the build? Do you have different plans to follow that match up with these Harke's? Bass cabs can be tricky, esp if you have to deal with crossovers when adding things like compression tweeters/horns.