NOMINAL SPECIFICATIONS : 

Type Plane Wave Guide
Throat Diameter 25.4 mm ( 1 in) 
Frequency Range 1÷ 20 kHz
Recommended Crossover Freq. ( 1) 1.6 kHz
Horizontal Nominal Coverage ( -6dB) ( 2) 140° 
Material Al
Mouth Height 122.3 mm ( 4.81 in) 
Mouth Width 86 mm ( 3.39 in) 
Depth 110 mm ( 4.33 in) 
Mouth Mounting Holes ( 4x) 6.5 mm ( 0.26 in) 
Net Weight 480 g ( 1.06 lb) 
Shipping Box
( Single Carton Box) 150 x 123 x 102 mm
( 5.9 x 4.8 x 4.0 in) 
Shipping Weight 500 g ( 1.10 in) 
NET Air Volume filled by HF Horn 0.35 dm^ 3 ( 0.012 ft^ 3)