One room looks like something in a typical home, for blind studies on whether JBL’s or a competitor’s speaker sounds better. A huge “arena testing room” allows technicians to monitor how a sound system like the one at Staples Center, Dodger Stadium or the Cal State Northridge Performing Arts Center will work.
http://www.latimes.com/business/la-fi-jbl-audio-20161223-story.html
LA Times
Clip Category
Northridge