The problem with the floor could be solved to some degree by putting more weight on it so anything with mass under the speakers would help. If the floating floor is vibrating then it just needs weighting down. Play some test tones and find out which tone is the centre of the problem.
You're likely suffering problems from the positioning as well. It's my understanding you should get the speaker further into the corner or further away from it. The position you have where the top driver is the same distance from the wall and floor can cause problems too. Again, test tones would help you establish where the boosted frequencies are. Also listening for 'one note bass lines', if you're not hearing the changing notes in the bass line then you've probably got a massive hump around 50/60hz. Personally unless I was listening on a beanbag I'd want those speakers much higher off the floor.
Spikes are generally for carpet, the idea is they go through the carpet and connect to the floor. People love spikes for some reason.
The problem with the floor could be solved to some degree by putting more weight on it so anything with mass under the speakers would help. If the floating floor is vibrating then it just needs weighting down. Play some test tones and find out which tone is the centre of the problem.
You're likely suffering problems from the positioning as well. It's my understanding you should get the speaker further into the corner or further away from it. The position you have where the top driver is the same distance from the wall and floor can cause problems too. Again, test tones would help you establish where the boosted frequencies are. Also listening for 'one note bass lines', if you're not hearing the changing notes in the bass line then you've probably got a massive hump around 50/60hz. Personally unless I was listening on a beanbag I'd want those speakers much higher off the floor.
Spikes are generally for carpet, the idea is they go through the carpet and connect to the floor. People love spikes for some reason.