How big a space should there be for rear wave?
The rule of thumb is that for each driver used, there should be a space no smaller 10 times larger than the Vas of the individual driver. That is then multiplied times the number of drivers. 10 times the total Vas or larger is considered optimal. For a more in depth explanation regarding the ‘why’ of the of the 10 times Vas recommendation click HERE I want to add a bit of an addendum to the answer to question #6. For those that can’t do a 10 times Vas IB, but can do at least 4 times Vas, go ahead and build it. Now this won’t be a true IB (Qts =Qtc) . But anytime you can get a space that’s 4 times Vas, you’ll have a sub with better sound quality than a standard portable box sub. Note, one will need to use standard sealed box construction techniques with a 4 times Vas box. Be sure to choose low Vas drivers if you take this approach. 7) How many drivers should I use? This is a difficult question to answer accurately given the variables involved. To error on the side of safety, we recommen
