JBL Xtreme 3 is a good alternative to the heavy Boombox 2, and only half as expensive.
I Work in Pro Audio, and This Is Why You Should Buy a JBL Xtreme 3 - History-Computer
JBL Xtreme Portable Bluetooth Speaker Review
JBL XTREME 3 Portable Bluetooth Speaker Share your music wherever you go with this JBL XTREME 3 portable speaker. Portable speakers are perfect for outdoor get-togethers at the park or beach. With this device, you can invite even more friends out than usual and still be sure that everyone will hear the music. JBL speakers tend to bring listeners powerful acoustics, but this model takes it to the next level with four drivers and pumping JBL Bass radiators.
JBL - Xtreme 3 - Portable Bluetooth Speaker - Black
Review: JBL Xtreme 3 is a durable Bluetooth speaker great for bass lovers
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Review: JBL's new Xtreme Bluetooth speaker goes big on sound and design
Xtreme 3 Charging : r/JBL
JBL Xtreme 3 - Portable Bluetooth Speaker, Powerful Sound and Deep Bass, IP67 Waterproof, 15 Hours of Playtime, Powerbank, PartyBoost for Multi-speaker Pairing (Black) : Electronics
JBL Xtreme 3 Portable Bluetooth Speaker Review - LiquidAudio
Review: JBL Xtreme 3 with new app-based EQ - STEREO GUIDE
JBL Xtreme 3 review: Great for outdoors, but lacks bass
JBL Xtreme 3 review: Boshing out the bass