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The easiest way of doing it is just build the full 2 pairs of reccession busters and place the one pair beside each other both pointing off axis and hook up the back facing speaker out of phase. That is only if your amp/receiver can handle the load of two speakers on the same channel.


This keeps the option open for single speakers if you don't like the dipoles.
 

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Originally Posted by brandonnash /forum/post/16998297


The easiest way of doing it is just build the full 2 pairs of reccession busters and place the one pair beside each other both pointing off axis and hook up the back facing speaker out of phase. That is only if your amp/receiver can handle the load of two speakers on the same channel.


This keeps the option open for single speakers if you don't like the dipoles.

With the 8" deep sealed cabinet that will result in a 6dB peak at about 420Hz and additional 6dB/octave roll-off below 140 Hz.


To avoid that you need a notch filter and shelving low-pass, roll off one of the mid-bass drivers, or apply an all-pass to one of the mid-bass drivers.
 
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