4) JBL 8124 4" Full Range Commercial 70V/100V 6w Ceiling Speakers 4 Restaurant 50036903974 | eBay
JBL LCT 81C/TM 8-inch Low-Profile Lay-In 600 x 600 mm Ceiling Tile Speaker (Pair), 40W @ 8 Ohms
JBL Professional Control 26CT 6.5-Inch Ceiling Loudspeaker Transducer Assemblies, With Transformer Taps, Sold as Pair, White : Amazon.co.uk: Electronics & Photo
4) JBL 8124 4" Full Range Commercial 70V/100V 6w Ceiling Speakers 4 Restaurant 50036903974 | eBay
Sonos Amp & 4 x JBL Studio 2 6IC In-Ceiling Speakers – Ceiling Speaker World