Home / Specs / JBL Everest 300 JBL Everest 300 Full Specifications JBL Everest 300 specsSpeakers: 40mm driversDesign: Supra-auralSensitivity: 100dBFrequency response: 10Hz - 22kHz Related articles yugatech.com Mar 3, 2016 JBL Everest 300 Wireless Headphones Quick Review JBL launched the Everest lineup at last year's IFA and the 300… By Kevin Bruce Francisco Read → Related specifications JBL S200i View specs → JBL Pulse Battery: Polymer Li-ion 3.7V 4000mAh, 14.8Wh View specs → JBL J33i View specs → JBL Synchros S100i View specs → JBL Clip Lithium-ion Polymer 600mAh View specs → JBL Charge 2+ 6,000mAh Li-ion polymer, 3.7V View specs →