To rightly match the sound of DIVA 255 with the acoustics of your room, it is possible to change the bass frequencies level, simply fitting the supplied foam plug in the reflex vent. Diva 252 is finished with a stylish black high-gloss lacquer. Type 2-way loudspeaker Enclosure load bass-reflex Suggested amplifier 30 - 100 watt Amplifier load impedance 4 - 8 ohm Frequency range 48 - 22000 hertz Sensitivity (2.83 V / 1 m) 90 dB Drive units 140 mm woofer 26 mm dome tweeter Crossover 2900 hertz Dimensions 160 x 280 x 275 mm Weight 5.3 Kg Technical features bi-wiring bi-amping Accessories foam plug supplied Finishes black hig-gloss