Rear Ported versus Non Rear Ported floor standing


I have a space limitation in our room which means that the speakers can only be placed a max of 6-8" from the rear wall. Does this mean that I need to stay away from rear ported speakers because they all have diminished sound because of the base or will all speakers have the same result . Any recommendations would be appreciated. Have heard at audio shop SF grand piano all off the rear wall, Spendors (rear ported) & Focal Chorus ( not rear ported).
murr

Showing 1 response by audiofeil

>>If a speaker goes too low for a room to contain the bass the speaker can produce you are in for standing room city, which is worse than a little extra bass bloat by putting a rear ported speaker in a cabinet!<<

This is a huge assumption and mostly hifi wives tale. Standing waves in the bass regions are mostly a function of diaphramic losses and in reality no playback room is big enough to properly handle the bottom octave.

In a very truncated nutshell, you can have great bass behavior, even down to 16Hz in a small room. Standing waves will likely be more of an issue in small rooms with bass in the 50Hz to 80 Hz range.

I recommend you bone up on this a little. There are a couple references that will help you understand better:

One is "Fundamentals of Acoustics", Third of Fourth Edition
Wiley press

The other is Harry F. Olson's book. It contains less math, fewer proofs and is totally solid; easier to understand if you do not have a strong math and physics background.