Fair test from Marvda. I know there are hundreds of magic little tricks that can help to enjoy the sound. But talking about this particular, a book o something similar to rise the speaker might have similar effect. If not, well, then you have something really good to improve your sound.
When it comes to these tricks I ask always myself the same question: don´t you think if a speakers manufacturer knows that by using such isolators their speakers sound better, he would use them or recommend them out from the box???? and those devices will be common and extended to everybody? Just thinking loudly.
I believe spikes supplied by Louis do the job, but if I hear from the manufacturer that his speakers sound much better in every room with those isolators, I will thing about them obviously.