well, during some retests, it seemed that you didn't really hear it, it more was the noise on the mp3 file, and other unknown sounds...
besides that, some things started to shake, things shook harder with higher freqs, like 40 hz, and 63 hz and up, I don't do those tests very much though...

I do hear that frequencies in the 70 hz area play a little louder than other frequencies...
and that frequencies in the 200hz area are quieter than the other frequencies...
but i'm happy, they have never did anything wrong, they never ratteled, and play really mighty in the lower frequencies, the ones that they reach at least...

If I ever get the chance of visiting you, I'll surely do...


Keep them spinning,
Bert.