PA Amplifier

A PA system or Public Address system is an electronic sound amplifier and distributor which can be used to make announcements in places where sound pollution is at its peak. PA systems are widely used in Dhaka, and Bangladesh in general.

How does a PA system work?

A PA system consists of one or more microphones , speakers, a mixer (to regulate volume, tone and balance of different voices), and an amplifier. The microphone transforms sound into electrical signal, it is plugged into a mixer,it allows multiple channels of sound to be broadcast at varying levels.The amplifier magnifies the audio signal, loudspeakers transforms the electrical signal back into sound.

Who and where can it be used?

PA system devices are mainly used in railway stations, offices, schools or any large building where loud sound is required so that it is still audible over all the noise. It is also used in places where announcements are made, like stadiums, museums and other public venues. A sound system is required for any conference and meeting. They are an integral part of any modern building, public and household alike. These systems play a major role in security too, ensuring household safety of millions of people around the world.

Benefits of PA systems

In today’s world, communication is one of the keys to running any business, organization or any other type of work firm. Lots of people work together in any company. To establish proper communication between all concerned people in a work-space, PA system are extremely important and helpful. The PA system allow a person or a group of people to communicate and voice their message directly to all people. Not only does this help to establish proper workflow in an organization, but it also furthers security and redundancy in production. With the help of PA systems, notifications for particular people or groups of people, enforcing standards, maintaining security, addressing issues, etc. can be easily done. Without PA systems, these functions would require a high amount of additional time, labor and resources.

Top brands and model:

TOA – TOA has a long reputation of providing people with proper sound systems for all their uses. Based in Japan, they are famous for their decades of top quality sound products, ranging from microphones and amplifiers, to wireless and security products. Along with the production of regular use systems, TOA conference system keeps an eye out for the future, constantly developing new and advanced products for the next generation. Their top models are the A-1000 AS series amplifiers for small events or places like small offices, the A-1724 for a broader coverage for big supermarkets, mosques, factories and the like, and the A-2000 series for massive scale applications like big complexes and events.

Ahuja – Ahuja Radios is India’s largest manufacturer and exporter of PA system. Their experience and knowledge, dating back from their establishment in 1976, is reflected in the products. They have already gained much fame for their long lasting and high quality products. Their product lineup is one to suit all types of PA system applications.

TOA power amplifier well-suited for broadcasting paging and supplying background music in restaurants, pubs, shops, houses of worship and so on. This amp is simple to operate and benefts from separate bass and treble controls. A muting facility on the Mic 1 imput enables paging announcements to be made at any time, with the music automatically returning to the normal level once the announcemet is finished.

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Types on TOA PA Amplifier

PA system-toa-mixer-Power-Amplifier

Power Source 220 – 240 V AC, or 24 – 30 V DC
Rated Output 30 W
Power Consumption 34 W (EN60065), 78 W (AC operation at rated output),
2 A (DC operation at rated output)
Frequency Response 50 – 20,000 Hz (±3 dB)
Distortion Under 1% at 1 kHz, 1/3 rated power
Input MIC 1 – 3: -60 dB*, 600 Ω, balanced, phone jack
AUX 1,2: -20 dB*, 10 kΩ, unbalanced, RCA pin jack
Output Speaker out: Balanced (floating)
High impedance: 330 Ω (100 V), 170 Ω (70 V)
Low impedance: 4 Ω (11 V)
Rec out: 0 dB*, 600 Ω, unbalanced, RCA pin jack
Phantom Power DC +21 V (MIC 1)
S/N Ratio Over 60 dB
Tone Control Bass: ±10 dB at 100 Hz
Treble: ±10 dB at 10 kHz
Muting MIC 1: Mutes other input signals by 0 – 30 dB attenuation
Indicator Power, signal, peak
Finish Panel: ABS resin, black
Case: Steel plate, black
Dimensions 420 (W) × 100.9 (H) × 280.3 (D) mm (16.54″ × 3.97″ × 11.04″)
Weight 5 kg (11.02 lb)

Bangladesh-toa-mixer-Power-Amplifier

Power Source 220 – 240 V AC, or 24 – 30 V DC
Rated Output 60 W
Power Consumption 72 W (EN60065), 150 W (AC operation at rated output),
4 A (DC operation at rated output)
Frequency Response 50 – 20,000 Hz (±3 dB)
Distortion Under 1% at 1 kHz, 1/3 rated power
Input MIC 1 – 3: -60 dB*, 600 Ω, balanced, phone jack
AUX 1,2: -20 dB*, 10 kΩ, unbalanced, RCA pin jack
Output Speaker out: Balanced (floating)
High impedance: 170 Ω (100 V), 83 Ω (70 V)
Low impedance: 4 Ω (15.5 V)
Rec out: 0 dB*, 600 Ω, unbalanced, RCA pin jack
Phantom Power DC +21 V (MIC 1)
S/N Ratio Over 60 dB
Tone Control Bass: ±10 dB at 100 Hz
Treble: ±10 dB at 10 kHz
Muting MIC 1: Mutes other input signals by 0 – 30 dB attenuation
Indicator Power, signal, peak
Finish Panel: ABS resin, black
Case: Steel plate, black
Dimensions 420 (W) × 100.9 (H) × 280.3 (D) mm (16.54″ × 3.97″ × 11.04″)
Weight 7 kg (15.43 lb)

pa-system-toa-mixer-Power-Amplifier

Power Source 220 – 240 V AC, or 24 – 30 V DC
Rated Output 120 W
Power Consumption 124 W (EN60065), 260 W (AC operation at rated output),
8 A (DC operation at rated output)
Frequency Response 50 – 20,000 Hz (±3 dB)
Distortion Under 1% at 1 kHz, 1/3 rated power
Input MIC 1 – 3: -60 dB*, 600 Ω, balanced, phone jack
AUX 1,2: -20 dB*, 10 kΩ, unbalanced, RCA pin jack
Output Speaker out: Balanced (floating)
High impedance: 83 Ω (100 V), 42 Ω (70 V)
Low impedance: 4 Ω (22 V)
Rec out: 0 dB*, 600 Ω, unbalanced, RCA pin jack
Phantom Power DC +21 V (MIC 1)
S/N Ratio Over 60 dB
Tone Control Bass: ±10 dB at 100 Hz
Treble: ±10 dB at 10 kHz
Muting MIC 1: Mutes other input signals by 0 – 30 dB attenuation
Indicator Power, signal, peak
Finish Panel: ABS resin, black
Case: Steel plate, black
Dimensions 420 (W) × 100.9 (H) × 360.3 (D) mm (16.54″ × 3.97″ × 14.19″)
Weight 10.8 kg (23.81 lb)

Bangladesh-toa-mixer-Power-Amplifier

Power Source 220 – 240 V AC, or 24 – 30 V DC
Rated Output 240 W
Power Consumption 238 W (EN60065), 520 W (AC operation at rated output),
15 A (DC operation at rated output)
Frequency Response 50 – 20,000 Hz (±3 dB)
Distortion Under 1% at 1 kHz, 1/3 rated power
Input Line in: 0 dB*, 10 kΩ, balanced, screw terminal
100 V line in: 40 dB*, 330 kΩ, unbalanced, screw terminal
Power remote control: Make contact
Output Loop out: 0 dB*, 10 kΩ, balanced, screw terminal
Speaker out: Balanced (floating)
High impedance: 42 Ω (100 V), 21 Ω (70 V)
Low impedance: 4 Ω (31 V)
S/N Ratio Over 60 dB
Tone Control Bass: ±10 dB at 100 Hz
Treble: ±10 dB at 10 kHz
Indicator Power, signal, peak
Ventilation Fan cooling
Finish Panel: ABS resin, black
Case: Steel plate, black
Dimensions 420 (W) × 100.9 (H) × 351.3 (D) mm (16.54″ × 3.97″ × 13.83″)
Weight 13.2 kg (29.1 lb)

 

Equipped with 6 Microphone inputs and 5 AUX inputs (simultaneous use of 9 inputs possible), the A-1724 PA amplifier of 240 W is designed to suit the following PA system applications: announcements, BGM, and broadcasting in mosques, churches, large rooms, and factories.

 

TOA-a1724-Mixer-Power-Amplifier-bangladesh

Power Source 220 – 230 V AC, 50/60 Hz
Rated Output 240 W
Power/Current Consumption 532 W (rated output), 220 W (EN60065), 60 mA or less (when power switch is OFF)
Frequency Response 50 Hz – 20 kHz (±3 dB)
Distortion 2 % or less at 1 kHz, rated power
Input MIC 1 – 6: -60 dB*, 600 Ω, electronically-balanced,
combined type of XLR-3-31 equivalent and phone jack
AUX 1 – 2: -20 dB*, 600 Ω, electronically-balanced,
combined type of XLR-3-31 equivalent and phone jack
(Either MIC 5 or AUX 1, and either MIC 6 or AUX 2 selectable)
AUX 3 – 4: -20 dB*, 10 kΩ, unbalanced, RCA pin jack
AUX 5: -20 dB*, 10 kΩ, unbalanced,
combined type of XLR-3-31 equivalent and phone jack
PWR AMP IN: 0 dB*, 600 Ω, unbalanced, RCA pin jack
(An equalizer or other signal processor connectable between LINE OUT
and PWR AMP IN terminals)
Output REC: 0 dB*, 600 Ω, unbalanced, RCA pin jack
LINE: 0 dB*, 600 Ω, unbalanced, RCA pin jack
SPEAKER SELECTOR: 2 zone, high impedance (100 V line/42 Ω), individual selector key,
M4 screw terminal
DIRECT SPEAKER OUT: High impedance (100 V line/42 Ω), M4 screw terminal
Low impedance (4 – 16 Ω), M4 screw terminal
(Both Low and High impedance terminals cannot be used at the same time.)
Phantom Power ON or OFF for each MIC1 – 6 with switch setting (+17 V DC)
S/N Ratio (Band Pass : 20 Hz – 20 kHz) 100 dB or more (Master volume: min)
76 dB or more (Master volume: max)
60 dB or more (MIC 1 – MIC 4)
53 dB or more (MIC 5, MIC 6)
76 dB or more (AUX 1 – AUX 5)
Tone Control Bass: ±10 dB at 100 Hz, Treble: ±10 dB at 10 kHz
Control Input REMOTE VOLUME: M3 screw terminal
POWER REMOTE: No-voltage make contact input,
open voltage: 28 V DC (when the unit’s power is OFF),
short-circuit: 10 mA or less, M3 screw terminal
Indicator 5 point LED output level meter, Power indicator LED, Zone indicator LED
Operating Temperature -10 ℃ to +40 ℃
Finish Panel: ABS resin, black, hairline
Case: Steel plate, black
Dimensions 420 (W) × 107.7 (H) × 367 (D) mm
Weight 13.5 kg
Accessory Power cord ……1, Terminal block cover ……1, Terminal block cover mounting screw ……2

 

TOA’s newly launched A-1000 AS Series Mixer Power Amplifiers come with a 5-zone speaker selector that is suitable for small scale broadcasting or background music usage. An all call button allows broadcasting to be made to all 5 zones. This is ideal for use in places such as supermarkets, factories, offices and more.

toa-amplifier-bangladeshFeatures of Amplifier:

– 3 Mic inputs, 2 Aux inputs, 1 pre-output
– Speaker output of high impedance (100V line) and low impedance (4-16W)
– Muting function enables Mic 1 input to have priority over other inputs
– 5 zone speaker selector and 1 all call
– Bass and treble control
– 5-step LED signal indicator
– Output short circuit protection, and thermal protection circuitry prevents failure due to overheat.

 

The A-230 is a power amplifier well-suited for broadcasting paging and supplying background music in restaurants, pubs, shops, houses of worship and so on.

 

Amplifier buy bangladesh

 

Power Source 220 – 230 V AC, or 12 V DC
Rated Output 30 W
Power Consumption 34 W (AC operation at IEC60065)
Current Consumption 4.5 A (DC operation at rated output)
Frequency Response 50 Hz – 20 kHz
Distortion 1 % or less at 1 kHz, 1/3 rated power
Input MIC 1 – 3: -60 dB* (1.0 mV), 600 Ω, unbalanced, phone jack
AUX: -20 dB* (100 mV), 10 kΩ, unbalanced, RCA pin jack
Output Speaker out: Floating balanced
High impedance: 330 Ω (100 V)
Low impedance: 4 Ω (11 V)
S/N Ratio 60 dB or more (MIC 1 – 3)
70 dB or more (AUX)
Tone Control Bass: -10 dB at 100 Hz
Treble: -10 dB at 10 kHz
Muting MIC 1 overrides other Mic inputs and AUX input with 0 – 30 dB attenuation,
attenuation by MIC 1 input
Indicator Power LED, Signal LED
Finish Panel: ABS resin, black Hair Line
Case: Steel plate, black
Dimensions 350 (W) × 105 (H) × 240 (D) mm (13.78″ × 4.13″ × 9.45″)
Weight 3.5 kg (7.72 lb)