XR-18 controlled from GP4 - Shared rackspaces - Gig Performer Community
Behringer X Air XR18 18-Input Digital Mixer for iPad/Android Tablets w – Weakley's Music Company
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Behringer X Air XR18 18-Input Digital Mixer for iPad/Android Tablets with Professional Monitoring Headphones & Microphone Platinum Bundle - Walmart.com
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Amazon.com: Behringer X Air XR18 Tablet-Controlled Digital Mixer : Musical Instruments