Simple Mid-Top SMT 212

with just 2 of the 4 ports? did you do anything scientific to work it out, or just went for it? how do you think they sound?

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.

cool, nice one. good info. i'd be hoping to use mine from about 150hz up to 1.2khz or so. what size circular ports did you settle on?

i spoke with stipe earlier this year about making single 12" with comps and he advised me that the ports would be excatly half of the original drawing.

Umnfortunately, I haven't had time to build them yet but I will get round to it eventually.

They are heavy enough with 2 PDN12.SB30's and 2 Fane CD280's made of 15mm Birch Ply. if your thinking of using 18mm the will probably be a two man lift.

Good luck with your build. smiley20

cut all the wood (well, mdf) today. they really are quite simple. looking forward to assembling them tomorrow... need to think about handles first though..

bit rough and scruffy but first one is together anyway....

i.imgur.com/EKGdg.jpg?1

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

Ollie_N wrote: 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.

http://i.imgur.com/hZkV9.jpg?1

filled and sanded and rounded over... bit rough. but they'll do. gonna slap some paint on them tomorrow, and think about grills.

smiley20