[ElectroKinetic]

I can't seem to find a definitive answer about what parameters to look for when choosing a subwoofer for an IB system. So far this is forum has the most info I've ever seen on the subject.

While expect the results to far from ideal, I would like to try and build an IB system in my car using the trunk as the box.

 

[ElectroKinetic]

Thanks for the info!

 

[ElectroKinetic]

I found the answer I was looking for on this page: http://www.caraudiomag.com/specialfeatures/0507cae_speaker_box/index.html

"When purchasing IB speakers, keep in mind the following parameters to assure that the speaker is right for the application. The first is the Qts (the total resistance of the driver at its resonance). Speakers with a Qts greater than 0.6 typically work well in an IB environment. The second is the Vas (the volume of air having the same compliance as the driver's suspension). The Vas should be smaller than the total volume of the environment the speaker(s) are being placed in."

The page also states that a IB setup is only about 50% efficient. Is this true?