DaVinci Group Ships Speaker System with Dual Voice Coil Tweeter Technology The DaVinci Group is now shipping the TDG Audio NFC-61STT speaker system with Dual Voice Coil Tweeter Technology for the architectural industry.RS Staff ⋅ Jan 13, 2014 The DaVinci Group is now shipping the TDG Audio NFC-61STT speaker system with Dual Voice Coil Tweeter Technology for the architectural industry. “I’ve wanted to improve the old standard of dual tweeter technology for years,” stated Jeff Francisco, vice president of sales for The DaVinci Group. “We are thrilled to be able to continue our focus on designing and delivering products that are unique and improve on legacy platforms to provide improved performance for The DaVinci Group partners. The dealer feedback on the early shipments made prior to the New Year has been outstanding.” The DaVinci Group is a privately held corporation with a unique business model that includes ownership status by employees, sales representatives and dealers. Their headquarters are located in Ontario, CA. The company specializes in the design, manufacturing and sales of products designed exclusively for the custom integration electronics and technology industries.