[sub_junkie]

How would I model two drivers, in seperate boxes? Like if I wanted to model two subs with a tune of 15.34hz, would I just make it one big box in WinISD with that same 15.34hz tune??

Thanks for any help

 

[collo]

Just model one driver in its own box.

If the boxes are placed apart, the total output from the two boxes will be 3dB higher than WinISD reports for one box.

If the boxes are stacked, you get mutual coupling between the drivers, causing them to act as one, giving up to 6dB higher

 

[sub_junkie]

OK, but to figure out the right port length for both of the boxes, how would I model that??

Thanks for the help

 

[brandonnash]

Just model with a single driver first and like collo said, add 3 db to the finished product. This will give you correct port lengths for each box.

 

[sub_junkie]

OK, that's cool to know.

So basically, if I were to get a second IXL 18 and put it in a 7 cu.ft box with the 15.34 hz tuning, I would just add 3db to the model in WinISD that has one IXL 18?

Thanks for the help

 

[Mike P.]

Yes. As for your port question, one sub in one box with one port. For 2 subs, twice the power, double the box volume and double the ports (same port diameter and length) = same air speed.

 

[sub_junkie]

Oh ok, I never even thought about putting double ports in it... duh..

Thanks for straightening that out for me.