Sound system
selection and price calculation for training hall
·
Hall
capacity -60 person
·
Hall
size: 18x 6 sqm= 108 sqm,
 |
| sound system for training hall |
Sound
pressure level required
=50dB/sqm
SPL
for hall
=108X50 = 5400 dB
Speaker
capacity
= 92dB/1W/1M
Output
of 15W speaker =92X15= 1380 dB
Speaker
efficiency
= 70% (say)
Quantity
of speaker =
dB required/(efficiency X output of one speaker)
= 5400/(0.7 X 1380) = 5.59, Say 6 nos.
Selection of
amplifier
Each
speaker wattage = 15 W
No.
of speaker
= 6
Total
watt
= 15 x 6 =90 Watt
Selected
amplifier =
160Watt
|
Sr.
|
Item
|
Description
|
Qty
|
Rate
|
Amount
|
|
1
|
Amplifier SSA-160
DP
|
160
WATTS WITH BUILT-IN DIGITAL PLAYER PA MIXER AMPLIFIER
·
5
× Mic 0.65mV/4.7kΩ, 2 × Aux 100mV/470 kΩ
·
Built-in
MP3 player with remote control for USB, SD/MMC card reader.
·
Preamplifier
and Line Output for connecting to a Booster Amplifier
·
Circuit
breaker for protection against overload and short circuit.
·
Instant
transfer to DC power (Car Battery) if AC power fails.
·
Box
Speaker/Driver Unit selector switch. Bass boost defeated at Driver Unit
position for safer operation of driver units.
·
5
LED array for output level monitoring.
|
1
|
12435
|
12435
|
|
2
|
wall speaker ASC-
20T
|
15W/100V, PA Column Speaker
·
For
Indoor applications like in Halls,
Auditoria,
·
Weather
resistant , Foam laye
·
Mounting
clamps & hardware
·
Aluminium
extruded cabinet with die-cast aluminium covers.
·
Aluminium
mesh grille in black colour.
·
100V
transformer with rotary switch for power tap selection.
|
6
|
2015
|
12090
|
|
3
|
UHF,
Wireless PA Microphones,
AWM-520V2
|
audio output:
0-50Mv,freq:40-15000Htz,antenna: telescopic, RF output power 10 mw, console
-1 no, mic -2 nos. set
|
1
|
4800
|
4800
|
|
4
|
PRO+3400, Mic
|
Frequency:
40-16,000Hz, impedance: 350ohm, cable: 10M twin core shielded low noise with
3 pin XLR connector & metal 6.3mm (¼”) phone plug, body: Zinc die-cast in
attractive finish
|
2
|
3800
|
7600
|
|
5
|
Paging
MIC, ACM-88, gooseneck microphone
|
Frequency: 50-15,000Hz , impedance: 600 ohm, Fitted with two robust e switches, flexible 300mm
(12”) gooseneck with 6 mtrs. twin core shielded cable with 6.3mm (¼”) phone
plug.
|
2
|
2165
|
4330
|
|
6
|
Microphone Stand
|
Type:
Table/Floor Stand, Height: 350-530 mm , Base Dia: 150 mm
|
2
|
1090
|
2180
|
|
7
|
Wireless mic adapter
|
Wireless mic stand
adapter
|
4
|
355
|
1420
|
|
8
|
Audio Extension Cable
|
3.5mm Male to Female Stereo Audio Extension Cable 5 Meters
|
5
|
340
|
1700
|
|
|
|
Total (Rs.)
|
|
|
46555
|
BACK GROUND
|
Source
|
Sound Pressure (Pa)
|
Sound Pressure Level (dB)
|
|
Leaf rustling
|
0.0000632
|
10
|
|
Normal conversation
|
0.01
|
54
|
|
TV set at home
|
0.02
|
60
|
|
Passenger car as heard from roadside
|
0.1
|
74
|
|
Jack hammer
|
2.0
|
100
|
|
Jet engine as heard from 100 yards
|
100
|
134
|
|
Extremely loud rock band
|
200
|
140
|
|
Jet engine as heard from 1 yard
|
630
|
150
|
General:
1.
The
column loudspeakers shall be installed vertically at a height of 1.5 m above
the ground level and inclined at an angle of 8 degree to 10 degree towards the
ground (if possible).
2.
All
the loudspeakers in each group should be connected in parallel and in phase
across the output line.
3.
Microphone
cable-These cables carry low level signal currents and are, therefore,
susceptible for electrical interference. Twisted pairs of conductors with
sufficient insulation, screened continuously with close mesh of tinned copper
braid shall be used. The copper braiding should be sheathed with an insulated
covering. The microphone cables shall be isolated from power, loudspeaker and
telephone cables.
4.
Joints
in the cables should be avoided as far as possible.
5.
The
speaker cable should be twin core rubber or PVC insulated lead-covered cables.
These should be rated for 250 volts insulation and should be isolated from
microphone cable and power cable.
