Sub Box Desgin

[yarix]

talnlnky, the box you have in your picture is nice. I assume the 8" speakers are matched, one being the driver and the other being the damper, right ? I see the tube is tuned. I also assume this is a folded tube design right ? I built a similar design in 1989 from an acoustics magazine (for home use). I remember I had to "load" the speakers (glue lead wire around the suspension) to drop their natural ressonance to 30Hz (I measured them at 39Hz from factory). This lowered the efficiency but made my simple speakers closer to professional ones. It was fun ! The tube response had a distinct peak at 27-28Hz and it's multiples. Even with this sound "coloring", the boxes were awasome ! Keep up the good work.