one single have 2 port. Same tune of one double. Calculated using my akabak sim. My version have quarter circular port. Why? because i like it more.
I use them from 200 to 1khz, I tested still 1,5khz but start to distort a bit. They sound good, no too much spl but pretty smooth, to me is in the middle between a full horn and a sealed chamber. They drops around 120hz but they haven't an aggressive kick.
Hey people! I'm new on this site, just wondered if the single 12 inch version could be used with a 1.4" p.audio compression driver on one of the 18 sound plastic 1.4 horns, many thanks cheers
well that's what i'm doing.. except with p-audio horns in my case. preneo 740 on ph305 horns. haven't done anything to this build in a while though.. have the 2 boxes together, need to fill and sand, fit speakon dish, and work out what i'm going to do about grills.