4 JBL Control 126 WT 6.5″ 30w Commercial 70v In-Wall Speakers For Restaurant/Bar
Optimum Air Cavity Behind Speaker: 20 to 40 liters (0.7 to 1.4 cu ft). Maximum Wall Thickness: 2 mm (1.25 in). High-slope crossover for natural midrange sound. Max wire size 14 AWG (1.5 mm)2. Frequency Range: 38 Hz - 20 kHz (-10 dB).