Quote:
Originally Posted by btp 
Seems like this sub is a great value, so it caught my interest. Perhaps this post belongs in the DIY speaker/sub forum, but... out of curiosity, I am trying to model the A5-350 in WinISD Pro using the specs that are available on the eD web site. I can't for the life of me figure out how they can get any kind of low end extension with such a small cabinet (4.17 cubic feet internally) and two 4 inch ports. Just to tune the box to 20 Hz the ports would have to be 37.4 inches long. So maybe I'm doing something wrong here or have the wrong specs for their driver?
Bradley

Seems like this sub is a great value, so it caught my interest. Perhaps this post belongs in the DIY speaker/sub forum, but... out of curiosity, I am trying to model the A5-350 in WinISD Pro using the specs that are available on the eD web site. I can't for the life of me figure out how they can get any kind of low end extension with such a small cabinet (4.17 cubic feet internally) and two 4 inch ports. Just to tune the box to 20 Hz the ports would have to be 37.4 inches long. So maybe I'm doing something wrong here or have the wrong specs for their driver?
Bradley
Thats a good Q actually..I noticed the same thing months ago. Of course, eD doesn't show in specs what the actual tuning frequency is, so we dunno. The specs just say "room tuning, 20Hz". So that leads me to believe the actual frequency would be a few Hz higher...





















