Toa BS-20 Manual de usuario

TOA SPEAKER SYSTEM

SPLASHPROOF SPEAKER SYSTEM

BS-20W

DESCRIPTION

The TOA BS-20W is a splashproof type speaker system

designed especially for railway station platform applications.

It incorporates a 13 cm (5.2") woofer and a piezo driver unit

with constant directivity horn, ensuring a uniform (30°

horizontal by 90° vertical) sound dispersion pattern.

The BS-20W has a splashproof ABS resin enclosure and a

painted finish to protect against ultraviolet rays. In addition,

its speaker unit is waterproofed.

Applications include high humidity/temperature areas, as

well as outdoors or under eaves where the speaker is likely

to be exposed to rain.

FEATURES

1. Sealed type enclosure.

2. One 13 cm (5.2") diameter splashproof cone speaker

3. Constant directivity horn plus splashproof piezo driver

unit (90° x 30°).

4. 20W rated power input and 94dB/w/m output sound

pressure level.

5. 100 Hz to 20 kHz frequency response.

6. Rotaly switch impedance changing (20W, 15W, 10W, 5W

on 100V)

7. Zinc-coated steel plate black-painted punching

net/mounting bracket

8. Stainless steel angle bolts.

SPECIFICATIONS

Type Sealedtype

Speaker for Mid/Low

Frequency

One 13 cm (5.2”) dia. splashproof cone

speaker

Speaker for High Frequency

CD horn (30° horizontal by 90° vertical) plus

splashproofpiezodriverunit

Rated Power Input 20W

NominalImpedance

500 ohms (20W), 670 ohms (15W),

1k ohms (10W) and 2k ohms (5W)

Output Sound Pressure Level 94dB/W/m

Frequency Response

100 Hz~ 20 kHz

Ambient Temperature

Material & Finish

-20~+55°C (-4~+122°F)

Enclosure:ABSresin, blackpaint

Punchingnet/Mounting brancket: Zinc-coated

steelplate,blackpaint

Bracket bolts: Stainless steel

Dimensions 342 (W) x 200 (H) x 175 (D) mm

13.5 (W) x 7.9(H) x 7.9 (D) inches

Weight 3.6 kg (8.0 Ibs)

*Specificatlons are subject to change without notice.

APPEARANCE AND DIMENSIONAL DIAGRAM

Changing the Wattage (Impedance)

j

Remove the waterproof cap at the side where the

woofer is attached.

k

Select the desired impedance (wattage) by rotating the

rotary switch with a flat head screwdriver.

l

After setting the impedance, be sure to replace the cap

as it keeps the speaker splashproof.

(Any change in impedance maintains the siren sound

pressure level at 90dB/m or better.)

Impedance 2k ohms

1k ohms

670 ohms 500 ohms

Wattage

5W

10W

15W

20W

*The BS-20W

is

factory-wired to 20W (500 ohms).

(100V line)

*Polarities: black (HOT), white (COLD).

CHARACTERISTIC DIAGRAMS

Frequency Response

(Anechoic chamber, 1W/1m, 1/3 octave pink noise)

Polar Response

horizontal

vertical

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