JBL Xtreme 3 Portable Bluetooth Speaker Review - LiquidAudio
JBL Charge 5 vs JBL Xtreme 3: which Bluetooth speaker is best for you? | What Hi-Fi?
Here's actual firmware and graph of the xtreme 3, any other old graphic with previous firmware is not anymore (specially when new xtreme 3 comes with 0.2.0.4) : r/Bluetooth_Speakers