Hello All.
Yesterday I was listening at pretty loud level (according to Phone SPL meter 83db average with 87db peaks at distance of 9 feets from the speakers) and I did hear I belive "thumping" noise from the Low Frequency driver of my Sonus Faber Olympica 2 speakers only on the drum kick parts of the song (was playing Max-O-Man song by Fourplay on TIDAL 16bit/44khz).
I could see the woofer doing very long excursions but I'm not sure weather I was clipping the amp or was pushing the limit of the speaker. The amplifier is Primare I35 Prisma which according to hifinews can deliver 190W / 395W Continuous power (<1% THD, 8/4ohm) and 192W / 415W / 510W / 260W Dynamic power (<1% THD, 8/4/2/1ohm).
The volume control of the amplifier was at 70 out of 100 units. According to Sonus Faber user manual, the speakers can handle 50 – 250W and the Long-term max input voltage (IEC-268-5) is specified at 20 V rms.

So, does anyone have clue what is happening, is it the speaker defective or is it the song having just to much low bass notes?