JBL Xtreme 3 is a good alternative to the heavy Boombox 2, and only half as expensive.
Xtreme3 : r/JBL
JBL Xtreme 3 Review: Made for the outdoors
JBL Xtreme 3 Review - The Overall Best Speaker?
JBL Xtreme 3 Review
JBL Xtreme 3 Review
JBL Xtreme 3 Portable Bluetooth Speaker - Powerful Sound & Deep Bass - IP67 Waterproof - Pair with Multiple Speakers - Wireless Speaker Bundle with Megen Protective Hardshell Case (Blue) : Electronics
JBL Xtreme 3 Vs Sony XG300 — GYMCADDY
JBL Xtreme 3 Review
JBL Xtreme 3 - Speaker - for portable use - wireless - Bluetooth - App-controlled - 100 Watt - 2-way - blue
Review: JBL Xtreme 3 is a durable Bluetooth speaker great for bass lovers
JBL Xtreme 3 review: Boshing out the bass