The general dimensions of these speakers are as follows: They have a total diameter between 160 mm and 195 mm and a depth between 30 mm and 153 mm . The distance between screws is from 125 mm to 153 mm . The hole diameter is from 113 mm to 145 mm . | They have a total diameter between 160 mm and 195 mm and a depth between 30 mm and 153 mm . | The distance between screws is from 125 mm to 153 mm . | The hole diameter is from 113 mm to 145 mm . | These speakers have a weight between 0.37 kg and 0.49 kg . | The system is 2-way . | The maximum power is 80 W and 120 W , achieving 89-90 decibels (db), a sufficiently high volume for good audibility, both outdoors and indoors. | The electrical resistance of these speakers is 4 OHM impedance . | A speaker's frequency response is a measure of the relative volume at which the speaker will reproduce different frequencies. These products have a response between 55-16000 Hz and 60-20000 Hz . | These speakers have a protection rating of IP 44 .