Nominal Impedance
8 Ohms
Sensitivity (2.83V/1m)
89dB
Frequency Response (±6dB) Open-backed
28Hz~20kHz
Frequency Range (-10dB)
20Hz~45kHz
Nominal Coverage (Degrees)
120°
Max SPL
111dB
Crossover Frequencies
540Hz, 2.6kHz
Drive Units LF: 250mm (10in.)
MF: 100mm (4in.) Uni-Q
HF: 19mm (0.75in.) vented aluminium dome with Metamaterial Absorption Technology¹
Recommended Amplifier Power
50W~250W
Recommended High-pass Filter (Hz)
30Hz~60Hz
Product External Dimension
Diameter Ø 346mm 
Depth 175mm
Cut-Out Dimensions
Diameter Ø 300mm
Net Weight 6kg 
Mounting Depth from Surface
168mm 
Ideal Rear Volume
150L
Minimum Rear Volume
80L
THX Certification
THX® Certified Ultra
Safety and Regulatory Compliance
IP64
Ceiling Thickness (Maximum)
30mm 
Ceiling thickness (Minimum)
6mm
¹Metamaterial Absorption Technology is a joint development with Acoustic Metamaterials Group.