I added a six pack of REL Carbon Specials to my Rockport Cygnus (which have great bass already for size and price) about 6 months ago. The added bass support was fun with modern soundtracks, but the creation of the "space" of the venue was something I have never been able to access before. My wife thought here he goes again on a wild goose chase, but was immediately saying that she loves them. It is the most significant upgrade beyond different main speakers that I have achieved. Once you hear what they can do, I don't think anyone will want to go without them. It's so not about more bass, the first two subs did that. It's about how much more engaging the experience becomes. If you notice several top of the line exotic brands have 4 box speakers with two of the boxes containing...you guessed it, three woofers. This set up is similar to my six pack next to my Rockports. Everyone who can try a 6 pack of subs should try it. I can't imagine going back to just mains.
Experience with stacked subwoofers?
I have seen a handful of responses to posts mentioning stacked line array subwoofers, like the stackable Rel 510s. Does anyone have a stacked subwoofer array in their system and can speak to their experience? The marketing hype that Rel puts out about this has me intrigued. Their explanation as to why it’s awesome makes sense, but also I want to go beyond the marketing and hear about real experiences before I drop a bunch of dough on something like that.