(Image credit: Erin Bashford) I've tested tons of the best Bluetooth speakers, but none hold as special a place in my heart as the JBL Xtreme series. I loved the Xtreme 4 back when it was released in 2024, and I love the Xtreme 5 in 2026. Though pricey, these are the two boombox-meets-portable party speakers I'd invest in for myself. But the Xtreme 5 comes with one major upgrade I've never personally seen on a speaker before — not one I've tested myself, anyway. The Xtreme 5 has an IP68 rating, meaning it has the highest-possible durability rating. Yes, this speaker is not only 99.9% waterproof, dustproof, it's now drop-proof, too. Article continues below Xtreme 5 is surviving the apocalypse (Image credit: Tom's Guide) An IP68 rating is pretty cutting-edge. It means the Xtreme 5 has the highest possible waterproof and dustproof rating. The "6" means the speaker is as protected as physically possible from dust ingress, while "8" means the speaker will survive sitting at the bottom of a pool.…