I've built a vented speaker box before, but want extra bass from my current driver. Thanks to WinISD I've decided to gain an extra 10hz by building a 6th order bandpass (at -3db, from 43 to 33 hz)

The question is, does it matter how much of the port tube is inside the rear chamber? The port length is tuned to 15hz and that equates to a 280cm long port with a diameter of 10cm...

Will it matter if only 180cm of pipe is in the rear chamber and the rest is lead through the front? No sound waves from the front will actually make it into the rear port as everything will be sealed..

Any help would be appreciated

Sorry if the description is bad.. if no understands i'll sign up for a free web page and upload a picture of the design..