The JBL PRX835W is a full-range speaker designed for main system applications. It has 15” woofer, 6.5” midrange transducer, and 1.5” compression driver powered by a 1500-watt class-D amplifier, PRX835W delivers incredible volume in a lightweight and compact form factor. The JBL PRX825W is a full-range speaker designed for main system applications. It has dual 15”, two-way, bass-reflex design powered by a 1500-watt class-D amplifier, PRX825W delivers incredible volume in a lightweight and compact form factor.