The document describes the TOA BS-633A/633AT wall mount speaker systems. The BS-633A is a basic 5" cone speaker with a transformer allowing multiple power taps. The BS-633AT includes an additional built-in attenuator, allowing connection to 2-wire and 3-wire speaker systems. Both have a compact ABS resin enclosure and push-in terminal for easy installation. Key specifications include a frequency response of 120-15,000Hz, 91dB sensitivity, and multiple power taps for 100V and 70V speaker lines.

1. BS-633A/633AT
Wall Mount Speaker System
APPEARANCE AND
DIMENSIONAL DIAGRAM
BS-633A
173 (6.81”) 101 (3.98”) 120 (4.72”)
184 (7.24”)
195 (7.68”)
BS-633A
81
(3.19”)
5 (0.2”)
Bridging terminal
(0.45”)
BLK 10kΩ
11.5
HOT BLK
3.3kΩ
BS-633AT 1.7kΩ
8Ω
12
WHT COM WHT (0.47”)
COM
Fixing Hole
(Transformer connection when the speaker is supplied from the factory)
(Note) Use transformer terminals when changing input impedance.
DESCRIPTION
The BS-633A/AT are wall-mount 5" (12cm) cone-type speakers with a BS-633AT
compact and unobtrusive enclosure of ABS resin. Installation is quick 173 (6.81”) 101 (3.98”) 120 (4.72”)
and easy, and the speakers can be hook-mounted or mounted directly
onto a wall. A push-type input terminal allows easy cable connections 184 (7.24”)
195 (7.68”)
and bridge wiring. Input impedance can easily be adjusted by
changing the tap position of the transformer. The BS-633AT comes
with a built-in attenuator and can be connected to 2-wire and 3-wire
systems. The speakers are highly cost-effective and well-suited for
BGM and announcement applications.
81
(3.19”) 5 (0.2”)
(0.45”)
12 11.5
(0.47”)
FEATURES Fixing Hole
• Compact and unobtrusive design Bridging terminal
N
• Quick and easy installation GRY R
N BLK C
• High cost-effectiveness Attenuator
BLK 3.3kΩ
RED 1.7kΩ N R COM
• Ideally suited for BGM and announcements R 8Ω 3-wire connection
WHT COM WHT N
C
R
(Transformer connection when the speaker is supplied from the factory) C
(Note) Use transformer terminals when changing input impedance.
HOT COM
2-wire connection

2. Polar Response SPECIFICATIONS
0° BS-633A
10
30° 330° Rated Input: 6W (100V line), 3W (70V line)
0
Rated Impedance: 100V line: 1.7kΩ (6W), 3.3kΩ (3W), 10kΩ(1W)
-10 70V line: 1.7kΩ (3W), 3.3kΩ (1.5W), 10kΩ (0.5W)
60° -20 300° Sensitivity (1W, 1m): 91dB
Frequency Response: 120 – 15,000Hz (–20dB)
-30
Speaker Component: 5" (12cm) cone-type
-40 Applicable Cable: 600V vinyl-insulated cable (IV wire or HIV wire)
270° Solid copper wire: ø0.8 – ø1.6mm (equivalent to
90°
AWG 20 – 14)
-40 7-core twisted copper wire: 0.75 – 1.25mm2
-30 (equivalent to AWG 18 – 16)
-20
Connetion: Push-in connector (bridging terminal)
120° 240°
Operating Temperature: –10°C to 50°C (14°F to 122°F)
-10
Finish: Case: ABS resin, off-white
0
240°
Rear bord: Hard board
150°
10 4000Hz Dimensions: 173 (W) × 195 (H) × 101 (D) mm
180° 2000Hz
1000Hz
(6.81" × 7.68" × 3.98")
500Hz Wall Mounting Case front mount: 184mm (7.24")
Dimensions: Fixing hole mount: 120mm (4.72")
Weight: 780g (1.72 lb)
SPL vs. Frequency Accessory: Speaker mounting screw (4 × 35 (0.16" x 1.38")) × 2,
110
Speaker mounting screw (4 × 16 (0.16" x 0.63")) × 2
100 BS-330AT
SPL (dB)
90 Rated Input: 6W (100V line), 3W (70V line)
80 Rated Impedance: 100V line: 1.7kΩ (6W), 3.3kΩ (3W)
70V line: 1.7kΩ (3W), 3.3kΩ (1.5W)
70
Sensitivity (1W, 1m): 91dB
60
20 50 100 500 1k 5k 10k 20k Frequency Response: 120 – 15,000Hz (–20dB)
Frequency (Hz) 3W Speaker Component: 5" (12cm) cone-type
1W
Applicable Cable: 600V vinyl-insulated cable (IV wire or HIV wire)
Solid copper wire: ø0.8 – ø1.6mm (equivalent to
AWG 20 – 14)
7-core twisted copper wire: 0.75 – 1.25mm2
(equivalent to AWG 18 – 16)
Connetion: Push-in connector (bridging terminal)
Attenation Level: 3W: OFF, 1 (–12dB), 2 (–6dB), 3 (0dB)
6W: OFF, 1 (–13dB), 2 (–7dB), 3 (0dB)
Operating Temperature: –10°C to 50°C (14°F to 122°F)
Finish: Case: ABS resin, off-white
Rear bord: Hard board
Dimensions: 173 (W) × 195 (H) × 101 (D) mm
(6.81" × 7.68" × 3.98") (excluding volume control)
Wall Mounting Case front mount: 184mm (7.24")
Dimensions: Fixing hole mount: 120mm (4.72")
Weight: 810g (1.79 lb)
Accessory: Speaker mounting screw (4 × 35 (0.16" x 1.38")) × 2,
Speaker mounting screw (4 × 16 (0.16" x 0.63")) × 2
Architect's and Engineer's Specifications
BS-633A BS-633AT
The speaker shall be a 5" (12cm) cone-type speaker suitable for The speaker shall be a 5" (12cm) cone-type speaker suitable for
wall mounting. Cable connection shall be by means of a push-in wall mounting. Cable connection shall be by means of a push-in
connector (bridging terminal). connector (bridging terminal).
The speaker shall include a transformer having multiple taps (1W, The speaker shall include a transformer having multiple taps(3W,
3W, 6W at 100V and 0.5W, 1.5W, 3W at 70V) adjustable. The 6W at 100V and 1.5W, 3W at 70V) adjustable. The output sound
output sound pressure level at a distance of 1m with a 1W input pressure level at a distance of 1m with a 1W input level applied
level applied shall be 91 dB SPL. The speaker shall have a shall be 91 dB SPL. The speaker shall have a frequency response
frequency response of 120 – 15,000Hz (-20dB). of 120 – 15,000Hz (-20dB). The speaker shall have a built-in
The speaker enclosure shall be constructed of ABS resin. The attenuator, enabling it to be connected to a 2-wire and a 3-wire
speaker shall be available in off-white colour. The unit shall have system.
dimensions of 173 (W) × 195 (H) × 101 (D) mm (6.81” × 7.68” × The speaker enclosure shall be constructed of ABS resin. The
3.98”), and a weight of 780g (1.72 lb). speaker shall be available in off-white colour. The unit shall have
The speaker shall be a TOA model BS-633A. dimensions of 173 (W) × 195 (H) × 101 (D) mm (6.81” × 7.68” ×
3.98”) (excluding volume control) and a weight of 810 g (1.79 lb).
The speaker shall be a TOA model BS-633AT.
TOA Corporation
www.toa.jp
Specifications are subject to change without notice.
Printed in Japan (0708) 833-52-382-60 u