View Full Version : help with port length

06-18-2007, 11:02 PM
hi im currently building this box for my 2 idmaxs.

i was wondering how much more port i should add to get the tuning down to around 30 hz?

06-19-2007, 03:08 PM
Wood tickness 0.75" ?

Port area: 51.6 sq.in.
Box volume: ~4.5cu.ft
Tuning freq: 30Hz
Port length: 28 in.

If box volume is a little bigger or a little smaller so tuning won't change much, maybe +/- 0.5Hz.

06-19-2007, 06:27 PM
k thanks i basically finished my box, except i just have to cut out the sub circles. ill take pictures and get the subs in. how loud do you think this set up is goign to get? they are powered by a 1200.1.

06-20-2007, 02:02 AM
Actutally I don't know these subs. But basically it should have a lot low bass because it's tuned low. Basically it should be SQ box. If you tune it to 40Hz or more it would be much more louder but not so low bass.
Try this box and tell us if you like it :)