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Subwoofer line array for 2 channel

While browsing high end 2 channel systems on line I'm seeing people stacking powered subwoofers in colums of three and four.Rel has some great pictures of this.Does anybody have any comments or advice on this technique? In my number 2 listening room l have a set of Revel Ultima Gems and have 4 subs now.lve decided to add 4 more and have two colums of 4 behind the speakers. Setting the crossovers at different points seems the technique being used.
So far lve had some impressive results.The spousal acceptance factor is not very high with these systems. 
vinnydabully

Showing 2 responses by kr4

kr4's avatar
kr4
3,704 posts
 
Stacking subs does nothing more than increase output.  Distributing them in the room is more useful because it can be very effective in minimizing the influence of room modes.
kr4's avatar
kr4
3,704 posts
 
I use the woofer towers from an Infinity RS-1B. I personally think this is close to ideal. 
 There is no problem with a stack or a tower of subs but, with only 2, they cannot be spatially distributed to deal with room modes.
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