Wave propagation is governed by wave equations which only depend on local characteristics of the propagation medium. This is partly proposed by Huygens. So, you can control the local properties of the medium in which in some directions you would observe higher amplitude of waves. This states that wave amplitudes can have spatially.

Back to your question; you would like to pull the waves to you ear...

1. so that you can have larger amplitudes than expected. The answer is you can not. You must change the propagating medium to to that.
2. so that you can have stronger bass (low pass signal). This could be possible only if you can filter out the high frequencies. Placing a marble plate in between or some other measure might work to attenuate the higher frequencies, relatively increasing bass. But you cannot amplify absolute level of bass. Sorry.

Wave propagation is governed by wave equations which only needs the local characteristics of the propagation medium. This is partly explained by Huygen's Law. If you can control the local properties of the medium then waves could prefer some directions which you would observe higher amplitudes. This is how antennas work. So in short, wave amplitudes can vary spatially. You can use acoustical "antennas" to direct sound waves towards you.

Back to your question; you would like to pull the waves to you ear...

1. so that you can have larger amplitudes than expected. The answer is you cannot pull waves. You must change the propagating medium to do that.
2. so that you can have stronger bass (low pass signal). This could be possible only if you can filter out the high frequencies. Placing a marble plate in between or some other measure might work to attenuate the higher frequencies, increasing bass only relative to higher frequencies. But pulling sound waves, and amplifying absolute level of bass, not possible. Sorry.