Easy Transport for Your Evolve 90 System Are you transporting your Electro-Voice Evolve 90 column speaker system? If so, do it the way we recommend here at Sweetwater and use this easy-rolling transport dolly. Tailor-made for your Evolve 90 column loudspeaker system, this dolly will make carting your setup around a stress-free affair.Portable solutions for large-scale applications Electro-Voice's Evolve 70 and Evolve 90 expand the company's Evolve family of column loudspeaker systems in response to customer demand for more powerful speakers aimed at large-scale events with audience sizes of up to 500. EV's Evolve series is a preeminent top seller here at Sweetwater due to its excellent balance of power, features, and portability. The Evolve 70 and Evolve 90 offer these same benefits, but with larger 15- and 18-inch subwoofers and 4.7-inch high-frequency drivers, yielding rafter-shaking maximum SPL characteristics and subterranean low-frequency extension specifications that often outperform larger and heavier