Bosch/Electro-Voice Ceiling Speaker Placement Calculator Calculator Rev 3.2
Room Dimensions Largedot Units of Measure 61.549095Width 80Length 54Height 12
Listener Height 4 8 Number of speakers 36Number of columns 9 columns
Speaker 0 Number of rows 8 rowsPattern Hexagonal
Tap Wattage 7.50 Distance bottom wall to first row 5.0 feet7.5 Distance between successive rows 10.0 feet7.5 Distance left wall to first column 3.0 feet
Pattern Distance between successive columns 6.0 feet10 Overlap between 6db cones, width 1.6 feet0 Overlap between 6db cones, length 5.6 feet
Speaker's nominal polar coverage 80 degreesDensity Speaker's sensitivity (1w/@/1 meter) 96.0 dB
Speaker's power tap setting 7.50 Watts
Estimated Level Variation -4.6 dBAverage SPL in room @ rated power 100.0 dB
Base cabling length needed (wire pair) 512 feetTotal Base power requirements 348 watts
Note: No factor for cable loss included in power estimate
Density Adjustment Minimum Wire Size GuideLength
Wire GaugeMaximum Rated Power
10 @ 70 Volts @ 100 Volts18 210 Watts 300 Watts16 420 Watts 500 Watts
10 14 1050 Watts 1500 WattsWidth 0 1 12 1400 Watts 2000 Watts
2.240
3.28
SquareHexagonal
High (noise masking)Medium (average, good coverage)Low (enconomy)
0 10 20 30 40 50
0
10
20
30
40
50
60
70
80Speaker Placement Pattern
Length
Wid
th
0 2 4 6 8 10 12 14 16 18
0
5
10
-6db coverage cones
Length
Hei
gh
t
IncreaseDecreaseCones along width
Cones along length
Feet Meters
Setting up the Room
Enter the room dimensions in areas Highlighted in green
Choose the speaker to be used from the drop down list and power tap from the drop down list.
Choose a speaker pattern, Square or Hexagonal
Speaker Pattern Results Graph
The top graph shows positioning of the speakers on a layout of the room
Select a density for the pattern, Medium is for normal coverage and produces about a 3 dB maximum level variation in the room
The slider bars allow slight adjustments to the pattern in the room by increasing or decreasing the number of row or columns in the pattern
The bottom graph is an elevation view which shows the -6 dB coverage cones of the speakers and how much cones overlap.
Room DimensionsDepth 300Length 205Height 12
Listener height 4
SPEAKER
Tap Wattage
Pattern
Density
Density AdjustmentLength
Width
Square
Hexagonal
High (noise masking)
Medium (average, good coverage)
Low (enconomy)
Evid C4.2
30
IncreaseDecrease
Smalldot
8
FALSE
30.003030
10TRUE
10
Speaker Placement Patte rn
0
50
100
150
200
250
300
0 50 100 150 200Length
Wid
th
-6db coverage cones
0
5
10
0 10 20 30
Length
He
igh
t
Increase Cones along width Cones along length
Room Coverage Information
The chart gives information about the number of speakers in the room and their positions,approximate levels of coverage in the room are also given
Information can be displayed in either english or metric units, The SPL in the Room is calculated depending on which units are selected
The amount of cable required for connecting the speakers is given, This assumes all the speakers are strung together on a single cable, The actual amount of cable required will depend on where the amplifiers are relative the room and, where required, how the room is broken up into zones
The amplifier requirements for the number of speakers used is given. This value is the number of speakers times the power tap used, plus a factor for loss in the speaker's transformer. If the room uses long runs of wire it may be desirable to increase the amplifier power slightly to compensate of losses in the wiring
The table shows the power that a given gauge wire is rated to handle, and is useful in choosing the needed wire size for the power used in the room
Smalldot
8
FALSE
30.003030
10TRUE
10
Speaker Placement Patte rn
0
50
100
150
200
250
300
0 50 100 150 200Length
Wid
th
-6db coverage cones
0
5
10
0 10 20 30
Length
He
igh
t
Increase Cones along width Cones along length
Number of speakers 45Number of columns 10 columnsNumber of rows 9 rowsPattern Hexagonal
Distance bottom wall to first row 5.6 metersDistance between successive rows 11.1 metersDistance left wall to first column 10.0 metersDistance between successive columns 20.0 metersOverlap between 6db cones, width 11.5 metersOverlap between 6db cones, length 2.7 meters
Speaker's nominal polar coverage 130 degrees85.0 dB7.5 watts
-3.1 dBAverage SPL in room @ rated power 79.6 dB
1900 metersTotal Base power requirements 435 watts
Note: No Factor for Cable loss included in Power Estimate
Base cabling length needed (wire pair)
Estimated Level Variation
Speaker's sensitivity (1w/@/1 meter)Speaker's power tap setting
Units of Measure
Feet Meters
@ 70 Volts @ 100 Volts210 Watts 300 Watts420 Watts 500 Watts
1050 Watts 1500 Watts1400 Watts 2000 Watts
Maximum rated power
181614
Minimum Wire Size Guide
Wire Gauge
12
Calculator Rev 3.2
Setting up the Room
Enter the room dimensions in areas Highlighted in green
Choose the speaker to be used from the drop down list and power tap from the drop down list.
Choose a speaker pattern, Square or Hexagonal
Speaker Pattern Results Graph
The top graph shows positioning of the speakers on a layout of the room
Select a density for the pattern, Medium is for normal coverage and produces about a 3 dB maximum level variation in the room
The slider bars allow slight adjustments to the pattern in the room by increasing or decreasing the number of row or columns in the pattern
The bottom graph is an elevation view which shows the -6 dB coverage cones of the speakers and how much cones overlap.
Room Coverage Information
The chart gives information about the number of speakers in the room and their positions,approximate levels of coverage in the room are also given
Information can be displayed in either english or metric units, The SPL in the Room is calculated depending on which units are selected
The amount of cable required for connecting the speakers is given, This assumes all the speakers are strung together on a single cable, The actual amount of cable required will depend on where the amplifiers are relative the room and, where required, how the room is broken up into zones
The amplifier requirements for the number of speakers used is given. This value is the number of speakers times the power tap used, plus a factor for loss in the speaker's transformer. If the room uses long runs of wire it may be desirable to increase the amplifier power slightly to compensate of losses in the wiring
The table shows the power that a given gauge wire is rated to handle, and is useful in choosing the needed wire size for the power used in the room
document.xls
geometry calcs Jim Long, 11-08-11; last edited 11-08-11
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Cricle 1X Y
left -2.918904 5bottom 3 -5.2580650677right 8.918904 5top 3 15.258065068
-2.918904 5