TOA Driver Unit Price in Bangladesh 2021:

TU-632M Driver Unit:
The TU-632M is a highly intelligible driver unit suited to public address announcement applications. The driver unit is used in combination with a suitable horn (optional). Powder-coated finish and stainless steel screws ensure the unit’s weatherproof capability.

Toa Driver in BD:
Applicable Horns TH-652
Rated Input 30 W
Line Voltage 100 V line or 70 V line
Rated Impedance 100 V line: 330 Ω (30 W), 670 Ω (15 W), 1 kΩ (10 W), 2 kΩ (5 W)
70 V line: 170 Ω (30 W), 330 Ω (15 W), 670 Ω (7.5 W), 1 kΩ (5 W), 2 kΩ (2.5 W)
Output Sound Pressure Level 110 dB (1 W, 1 m) (When operated with JIS C 5504 standard horn.)
Frequency Response 150 Hz – 6,000 Hz (When operated with JIS C 5504 standard horn.)
IP Code IP65 (When a driver is operated with a horn.)
Horn Coupling 1 – 3/8 18 threads (inch screw)
Polarity Hot: Black, Com: White
Operating Temperature -20°C to +55°C (-4°F to +131°F) (must be free from dew condensation)
Finish Upper Cover: Aluminum, White, powder coating
Unit Case: HIPS. White
Screws: Stainless steel
Speaker cable: Polyvinyl chloride insulated cabtyre cable
(6 mm (0.24″) in diameter, 450 mm (17.72″) in length), White
Dimensions Φ139 × 149 (D) mm (Φ5.47″ × 5.87″)
Weight 1.8 kg (3.97 lb)
TU-651 Driver Unit in BD:
The TU-651 is a highly intelligible driver unit suited to public address announcement applications. Use the driver unit in combination with a suitable horn (optional). Its powder-coated finish and stainless steel screws ensure the unit’s weatherproof capability.
What’s info of TOA Driver Unit in BD?
Applicable Horns TH-650, TH-660
Rated Input 50 W
Rated Impedance 16 Ω
Sensitivity 110 dB (1 W, 1 m) (When operated with JIS C 5504 standard horn.)
Frequency Response 150 Hz – 6 kHz (When operated with JIS C 5504 standard horn.)
Dust/Water Protection IP65 (When a driver is operated with a horn.)
Horn Coupling 1 – 3/8 18 threads (inch screw)
Polarity Hot: Black, Com: White
Operating Temperature -20 %%dC to +55 %%dC (-4 ゜F to +131 ゜F) (no condensation)
Finish Flange: Aluminum, gray, powder coating
Rear cover: ABS resin, gray
Screws: Stainless steel
Speaker cable: Polyvinyl chloride insulated cabtyre cable
(6 mm (0.24″) in diameter, 600 mm (23.62″) in length)
Dimensions %%c139 × 106 (D) mm (φ5.47″ × 4.17″)
Weight 2 kg (4.41 lb)
Option Driver unit cover: UC-200A
Matching transformer: TM-30T, TM-60T
The Evolution of TOA’s Horn Speaker Driver Unit:
TOA has been manufacturing horn speakers practically from the
company’s very beginning, over eighty years ago in 1934, and today
we are recognized even among our longstanding industry
contemporaries as a veteran of highest expertise in this field. By
1949 we had succeeded in developing Japan’s first reflex-type horn
speaker. We have always dedicated ourselves to being “an
international company contributing to human society through sound
and communication,” valuing above all the physical craftsmanship
that allows the delivery of the clearest possible sound information to
listeners. In 1962, an inquiry from abroad led us to conduct
transmission testing on an ultra-large PA system. This system, which
used a 6.6-meter horn and a 4kW transistor amplifier, marked a
transmission distance of 12 kilometers. This achievement would
prove instrumental in laying out our destiny of long-running
involvement in outdoor public address systems.

TOA-developed horn speakers were often painted blue, and they
would become widely familiar as “blue trumpets” unique to TOA. In
Indonesia, where we established both factory and sales facilities in
1976, TOA horn speakers became such a part of the public
landscape that they were often referred to as “Toas.” They are still a
conspicuous part of everyday life there, most notably for public
address among the country’s many mosques.

Even today, horn speakers represent one of the fundamental shapes of public address speakers, offering a simple PA system that remains more indispensable than ever in delivering public announcements. In Japan, too, where natural disasters are frequent, horn speakers are an essential component in the outdoor emergency notification systems used for broadcasting evacuation instructions and other vital information. Naturally, the demand for the clearest possible outdoor broadcasting sound is strong in this market.

In 2011, the Great Tohoku Earthquake caused a massive tsunami that devastated a great number of Japanese coastal towns and villages, taking the lives of many who were unable to escape in time. As this disaster unfolded, the sheer number of outdoor speakers calling out
evacuation instructions caused pronounced sound overlaps that made
their announcements difficult to hear. And in many cases, the speakers were
simply swept away by the rushing waters. Reflecting on these systemic
flaws, TOA has been developing longrange speakers capable of delivering
clear announcements with fewer speakers over longer distances, and
we have been testing these repeatedly in metropolitan environments to
continue deepening our expertise in outdoor sound broadcasting and
reinforcement.

Issues for TOA Horn Speakers in BD:
Improvement of Articulation:
Horn speakers are comprised of a driver unit and a horn, and thus
achieve highest efficiency through impedance matching with the air.
The sound pressure drops on both sides of the 1–2kHz range,
however, resulting in certain distinctive audio characteristics that
cannot be considered favorable in terms of creating good-quality
sound.

Improving these high and low range frequency characteristics is one
of the issues key to improving horn speaker sound quality.
Particularly, we now understand that improving the high range
contributes greatly to improving the articulation of outdoor
broadcasts. Attenuation in the air is more conspicuous for the high
frequency ranges.
Improvement of Durability:
Out in the field, there is also an inherent need to have horn speakers deliver higher volume and send the sound farther. Often, however, attempts to meet this need through excessive power input cause malfunction by damaging or even destroying the speaker’s driver unit. Therefore, in addition to improving frequency characteristics, improving driver unit durability is also an issue requiring better solutions.

Additionally, the events of recent y e a r s h a v e b r o u g h t u s t o understand that in the disaster prevention market, improving frequency characteristics not only improves articulation, it also has a positive impact on long-distance sound transmission capability
The Process Leading to the TU-652M:
TOA horn speaker driver units can be divided into several generations based on their diaphragm materials and constructions. In the past, we used
dome-type diaphragms made of phenol-impregnated Conex. In 2004, we switched the material to polyimide, and in our most recent TU-660 we have
also changed the diaphragm construction from dome-type to ring-type. Each of these various changes have aimed to improve sound quality
(frequency characteristics), product quality, durability, and productivity. The details of this development process are explained below.
Latest Update TOA Driver Unit Price in Bangladesh 2021:

Type
Model
Watts
Latest Price

Horn Speaker
SC-615
15 Watts
4,500.00

Horn Speaker
SC-630
30 Watts
8,500.00

Horn Speaker
SC-651
50 Watts
9,500.00

Horn Speaker
TU-652
50 Watts
3,500.00

Horn Speaker
TU-652M
50 Watts
6,500.00