Dual subwoofers-need to be from same manufactures?


I've got a very large room for my 2 channel stereo and have been thinking of adding a second subwoofer (current one is a Rel Strata III).

Does anyone have any experience using multiple brands? The Rel is pricy for me right now and I'm trying to sort out if I should wait before buying another REL vs a less exspensive brands (or used).
jayslevine
You might also need more powerful subs. Same brand, of course. And I would add same model. Two subs is a more correct arrangement anyway.
Anyone who suggests non directional bass energy should or can only come from identical subs suggests maybe you should get a second opinion. If somebody has 2 quality subs producing non directional energy how can anyone suggest thats the same as main speakers? Can any provide proof you could pick them out in a blind test?
Why not sell the REL and get a pair of SVS subs? The direct marketing of SVS offers more sub for less money.