I think before any of us can give you a good answer, we need to know what you are trying to accomplish...
If you're trying simply to have "more bass" and think that infrasonics is the answer, I have to agree with a couple of others who've pointed out that you simply cannot hear at those low frequencies.
Then there's the issue of "weaponized sound"... You can feel infrasonic vibrations on various parts of your body but that's a rather dangerous game to play. Some interpret it as an earthquake, others develop severe vertigo, otheres are moved to apparitions, still others can be induced into seizures and permanent hearing damage is common with only brief high level exposures. There have been numerous incidents of
theatres playing with this and causing panic in their audiences, with some very bad outcomes. A more recent example was the mysterious illness of
diplomats in Cuba.
Infrasonics have also been tested in demolition, as an alternative to explosives. Simply find a building's resonant frequency and vibrate it hard enough and it will come down.
That's some serious bad ju-ju.
All that said, there are a number of industrial servo drivers that can deliver thousands of watts at extremely low frequencies, right down to DC. These are normally motor controllers but if you think about it a speaker is just a DC position servo that happens to move air.
There are also quite a few pro-audio amplifiers that will get down to 2 or 3 hz at respectiable power levels, the
Crown XLS series for example.
