For Jbl Xtreme 2 Series 2.75-inch Mid-woofer Speaker, Enthusiast Dual Magnetic - Speaker Accessories - AliExpress
直販廉価 JBL Xtreme 3 Portable Bluetooth Speaker, Powerful Sound, 15 Hour Playtime, PartyBoost with Signature Gift Bundle | Includes Series EVA - caddytek.com
HOW TO FIX BASS ON JBL XTREME - JBL XTREME SPEAKER DRIVER REPLACEMENT (ALSO WORKS WITH JBL Xtreme 2) - YouTube