What acoustic guitar will provide me with the heaviest sound?

wait, is this the sound you want to get?
http://www.youtube.com/watch?v=gzKCgwvv-vw
because if it is you could just buy some Elixir strings and they sound nice on any guitar

I had a Luna Muse Burst for a while (it was defective, so I returned it), but I found the Luna guitars to have incredible depth/harmonics/overtones relative to other brands. I don’t know a whole lot about guitars in that sense, but they definitely struck me as something different in terms of the quality of their sound.

You want one with a harder wood (like, mahogony if they even make them of it).... the (the brand is irrelevant so long as it’s a good brand; Washburn, Ibanez, etc).

Usually people go for the soft woods (spruce for example), so you may have a lot of trouble on this one.

As suggested before, the strings you use will make a significant difference in the sound, higher gauge=lower sound.

I know what you mean, but I got to agree with the others about the strings for starters, and of course you could use a pedal or play with the dials on your amp a bit. I play a (borrowed) Takamine at the moment and it’s as heavy as it gets. Got a Fender that sounds like crap, 2 electrics, a hand-made Adamas that looks beautiful but is practically unplayable, and a pretty good, simple Yamaha with a clean sound. Good value for money but not what you mean I think.

You could also just change the magnets on it (assuming it works with magnets). Washburns are good, so you probably don’t really need to change your guitar, just tweak the one you have a bit.

While strings do have a lot to do with the guitars tone, the, big, fat, boomy tone i think you’re looking for comes from having a large guitar with good, resonant wood. i’ve got an old ‘65 Gibson J45 that has gorgeous tone – part of which is a bottom that makes fat girls cry. look into jumbo guitars – ones that aren’t thin. the bigger the guitar, the more room the lower notes have to resonate.