Originally Posted by brian4274
I just thought it was funny as there are several people on this forum who say to buy a premium sub vs 2 subs when they are the same price? Would it not make sense to buy cheaper subs in a quantity of 4 versus 1 premium sub? That is the way I take the document.
The answer, as usual, is "it depends." Personally, I'd say get 2-4 good subs, and just try to find a good deal.
In a closed room, where room modes are a major issue, multiple subs makes a huge difference for taming nulls.
If we're talking about low-fi (poor frequency response, high distortion, one note wonder) subs, no number of them can sound great.
If we're just talking about loudness, sometimes you can get more loudness from fewer more powerful subs.
If nearfield placement is practical for you, sometimes you can get by with 1 sub. Nearfield is particularly beneficial for open rooms (whether you get multiple subs or not.)
Many people forego subs, or don't budget much money toward them. Many other people feel like sub placement and tuning has a HUGE impact on overall sound quality, and spend a good portion of their budget on subs. I'm in the latter camp. I wouldn't even consider going without subs for a pure music system.
Subs are definitely challenging, though.
If you have a closed rectangular room, this room simulator is a good tool for weighing the benefits and placement options for multiple subs: