Elation Professional DP-415 Corded 4-Channel 8-Socket Stage Lighting Dimmer Pack
ADJ's DP-415: 4-Channel Dimmer/Switch Pack
ADJ American DJ DP-415R 4-Ch Dimmer / Switcher with Accessories | PSSL ProSound and Stage Lighting
Amazon.com: Elation Control 16 channel dimmer system. Includes the controller cables and 2x4 channel dimmer packs expandable with more DP415 dimmer packs : Musical Instruments