The dbx 640 is a professional 4-zone, 6-source digital zone processor designed for commercial audio distribution in restaurants, retail stores, hotels, and corporate spaces. With its intuitive setup wizard, built-in DSP, and compatibility with dbx zone controllers, the 640 provides a complete solution for multi-zone background music and paging in small-to-medium commercial installations.

• 4-zone, 6-source digital zone processor with built-in DSP
• Priority paging with microphone input for emergency override
• Compatible with dbx ZC-1 through ZC-9 zone controllers
• Built-in EQ, limiting, and delay on all zone outputs
• Intuitive setup wizard for fast system commissioning
• 1U rack-mount design for equipment room installation