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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3 12 9 12 15 12 21 12 27 12 33 12 39 128.78897577 4 14.78898 4 20.788975772 4 26.788976 4 32.7889758 4 38.7889758 4 44.7889758 4-0.7889758 4 9.211024 4 19.211024228 4 29.211024 4 39.2110242 4 49.2110242 4 59.2110242 4

5 12 15 12 25 12 35 12 45 12 55 12 65 1210.7889758 4 20.78898 4 30.788975772 4 40.788976 4 50.7889758 4 60.7889758 4 70.7889758 4

-9994.211 4 -94.21102 4 -94.211024228 4 -94.211024 4 -94.211024 4 -94.2110242 4 -94.2110242 4

Cricle 1X Y

left -2.918904 5bottom 3 -5.2580650677right 8.918904 5top 3 15.258065068

-2.918904 5