What is an IB subwoofer?
For ease of explanation it’s convenient to think of an IB sub as a massively large sealed box alignment. This is overly simplistic, but it serves the purpose of an introduction until such time as greater technical explanation benefits the conversation. Think of the baffle as an infinitely large boundary that provides isolation/separation between the front-wave and the rear-wave coming off the driver/drivers. For practical purposes this means the drivers are mounted so they share a common boundary between the listening room and an adjacent space. This adjacent space can be the attic, basement, crawl space, garage, or any room that shares a common wall with the listening area. However the IB is created, there must be adequate isolation between the front wave and rear waves. Complete isolation isn’t mandatory. This means that small cracks and openings, louvered doors, etc., aren’t a significant problem.
