The ceiling speaker calculator is a convenient online tool and a valuable resource for estimating the number of ceiling speakers needed for a sound reinforcement system in a room or listening area.
Ceiling speaker coverage formula.
It may be easier to understand as an equation.
Speakers square footage ceiling height ear height 3 2.
Square the result and then divide it into the square footage.
To generate the above layout we are using the following formula as per avixa cts d design guidelines.
If you look at the specifications of speaker boxes you should see something like dispersion h x v.
Virtual sim tells me that there is about a 8db difference from on axis to off axis.
Take spacing and divide by 2.
Here is how you lay out the ceiling speakers.
Coverage area per speaker the approximate area that each speaker covers defined by the frequency range of the audio content and the maximum allowable attenuation.
This is stating the nominal angle of high frequency dispersion in the horizontal and vertical plane.
The speaker coverage calculator recommends a upa 1p aimed 21 2 above the front.
Minimum needed power level the output wattage per speaker tap setting and amplifier power required to achieve the minimum needed spl as established earlier.
Take for example a recessed ceiling speaker that has a linear dispersion of 90 degrees at the 2khz octave the octave most important for speech articulation.
For simple purposes this formula should be used for all bose and jbl ceiling speakers plus any ceiling speakers that are four to five inches in diameter.
Starting in a corner place first speaker at this 1 2 spacing down the wall and 1 2 spacing into the room.
Coverage per speaker 211sq ft 304sq ft 414sq ft 541sq ft 684sq ft 845sq ft 1022sq ft 1216sq ft 1427sq ft 1655sq ft 2162sq ft 2736sq ft 3378sq ft basic system coverage per speaker 422sq ft 608sq ft 828sq ft 1081sq ft 1368sq ft 1689sq ft 2044sq ft 2432sq ft 2855sq ft 3311sq ft 4324sq ft 5473sq ft 6756sq ft.
Step 2 using this starter speaker use full spacing working left to right for first row.
Covered distributed speaker system to be edge to edge coverage where the edges of the speaker s coverage circles at the listening height just touch each other.
Subtract the ear height from the ceiling height and multiply that number by three.
Although there are formulas that can help you calculate proper coverage given controlled circumstances conditions created by room shapes ceiling heights the presence or absence of walls and many other factors combine to render the process of providing adequate speaker coverage as much an art as a science.
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