Ipx566

The 5‑inch woofer delivers a respectable punch down to ~45 Hz. While it’s not a “sub‑woofer” level of rumble, it’s enough to feel the thump in hip‑hop or EDM tracks. Bass Boost adds roughly +4 dB at 80 Hz without noticeably distorting the mids.

In technical terms, the "X" in a rating means "untested" or "not rated." Usually, it refers to dust. In the standard of IPX566, the "X" represents the unknown variable of the self. ipx566