Richmond Pro Sound on Twitter: "Revisiting a submission from Jonathan Graeber from 2011 (photo 1 of 3). "10 per side JBL Vertec 4888, 8 VT4882 subs centered under stage, 4 per side
Used Audio, Lighting and Video Equipment - Usedful.eu
Horn Loaded Array System Manual
JBL HLA 4897 Sub | Speaker design, Jbl, Speaker plans