More Power or use subwoofer to boost bass for music

Lemonhaze is correct on this, traps do work, but most people have woefully inadequate traps which are either large, expensive, or both. That is one of the reasons for many why a bass array is a better proposition for most within the limits of what they are going to achieve. 

You touch on a point that many miss, in that you have to be careful with the materials you use. Absorbent foam can often throw off tonal balance by absorbing too much mid-highs compared to base. Foam tends to be pretty useless in bass frequencies. Sound deadening fibreglass/rock-wool is far better. In the vast majority of listening spaces, I don't think standard bass traps with massive amount of fibre/rockwool and hence enormous size, like yours are practical and hence perhaps that is why atmasphere says they literally do not work ... because for most people they don't. In most listening rooms, the only practical acoustic solution for truly controlling bass resonant modes is a Helmholz resonator and to use one effectively, you need to take measurements and install the right ones and and/or get tunable ones. Strangely enough, the most "ardent" audiophiles, rarely have this simple and low cost measurement equipment preferring to "trust" their ears.

Have you actually tried sufficiently large traps in sufficient quantity to make an audible difference? I see guys using hopelessly small bits of foam or similar that at beat could only trap dust.

@lemonhaze  Certainly! Bass traps saved the day in our room at one of the last T.H.E. Shows in Las Vegas.

But a DBA simply does it better, that's all. You do the DBA first, **then** the bass traps (if needed), since the DBA is far more effective at sorting out bass problems.

Fixing bass in a room is not always thanks to bass traps.
Having the correct mid/treble diffusion and absorption can also increase the perceived bass by reducing the mid/treble energy, plus better imaging and reduced echo. All good side effects.

In other words, you don't increase the bass, you just reduce the mid/treble energy, while bass traps reduce bass energy somewhat, they smooth it out as well.

The moral of all this is one size doesn't fit all; in fact, the very opposite, every case is unique.  Variables, among other things: size of room, construction of room (floor, walls, ceiling); viable positions for speakers; speakers themselves, etc.  Some people will achieve excellent results with 2 subs, a happy few (?) with one.  And some may need more for "equitable" bass.  The upshot: one solution doesn't suit all.

@ erik_squires  Hi, you seem to be on a crusade to put down something which is valid and sorts out what is a real and common bass problem. I think the recommendations, for a DBA including from myself are in response to an understandable and innocent question from the OP.

By making these recommendations nobody stands to gain anything except for audiokinesis who can be commended for not relentlessly punting his product, unlike some vendors.

Casting aspersions on somebodies honesty and integrity is off-field and you need to wind your neck in on this. I think the ethos of a thread like this is to contribute in some meaningful way and not thread crap.