Avalon Acoustics OPUS Ceramique Loudspeaker - Manual (Page 44)

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11 Specifications
Driver Complement 1" concave ceramic dome tweeter
3 1/2" concave ceramic dome midrange
9" concave ceramic dome woofer
Sensitivity 87 dB (2.83V, 1 meter)
Impedance 5 ohms nominal (4.5 ohms minimum)
Frequency Response 28Hz to 24kHz (+/- 1.5 dB, anechoic)
Recommended Amplifier Power 30 to 300 watts
Wiring Methods Two position terminal block, designed to
accept spade lugs for #10 screws
Dimensions 41" high (104 cm)
10" wide (26 cm)
16" deep (41 cm)
Weight 95 pounds each (43 kg each)