SCREW-IN TYPE
CEILING SPEAKERS
DESCRIPTION FEATURES
PC-644SPC-643S
PC-645R PC-646R
Flush-mount ceiling type.
Safe and secure screw-in mounting.
Built-in 12cm full-range speaker.
Rated input: 6W (100V line) or 3W (70V line).
Easy impedance switching: 0.8W, 1.5W, 3W, and 6W
(100V line).
Wide 100 – 12,000Hz frequency range characteristics.
Four front grilles available:
(1) Square, ABS resin panel (PC-643S)
(2) Square, ABS resin frame + aluminum net (PC-644S)
(3) Round, ABS resin panel (PC-645R)
(4) Round, ABS resin frame + aluminum net (PC-646R)
TOA's PC-600 Series Flush-Mounted Ceiling Speakers
employ a dynamic, full-range 12cm speaker and feature
special screw-in type mountings that ensure safe installations.
Four front grilles are available in two shapes for easy
matching with virtually any decor. Speaker impedance
(wattage) can be easily adjusted to match installation
requirements.
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PC
-600
S
eries
CHARACTERISTIC DIAGRAMS
Polar Response
Directivity Factor vs. Frequency
Beamwidth vs. FrequencySPL vs. Frequency
Frequency
20 50 100 500 1k 5k 10k 20k
[Hz]
Directivity Factor
[Q]
20
10
5
1
Beamwidth
[deg]
200
100
50
10
Frequency
20 50 100 500 1k 5k 10k 20k
[Hz]
Hor.
Frequency
20 50 100 500 1k 5k 10k 20k
[Hz]
SPL
30
40
50
60
70
80
90
100
[dB]
110
fundamental
2000Hz
1600Hz
1250Hz
1000Hz
800Hz
630Hz
8000Hz
6300Hz
5000Hz
4000Hz
3150Hz
2500Hz
270°
0°
330°
300°
16000Hz
12500Hz
10000Hz
90°
60°
30°
10
0
-10
-20
-30
-40
270°
0°
330°
300°
90°
60°
30°
10
0
-10
-20
-30
-40
270°
0°
330°
300°
90°
60°
30°
10
0
-10
-20
-30
-40
270°
0°
330°
300°
90°
60°
30°
10
0
-10
-20
-30
-40
270°
0°
330°
300°
90°
60°
30°
10
0
-10
-20
-30
-40
APPEARANCE AND DIMENSIONAL DIAGRAM
Wiring Diagram
Unit: mm
Note: Use transformer terminals when changing input impedance.
PC-643S
200
4–ø4.3
162
200
162
ø143
7411
Ceiling
PC-644S
PC-645R
Black wire: Hot
13kΩ
8Ω
0Ω
6.7kΩ
3.3kΩ
1.7kΩ
COM
White wire: COM
200
4–ø4.3
162
200
162
ø143
7415
Ceiling
ø191
3–ø4.3
P=ø180
ø150
748.5
Ceiling
PC-646R
ø191
3–ø4.3
P=ø180
ø150
7410
Ceiling
Specifications are subject to change without notice.
Printed in Japan (0109) 833-62-158-00 U
TOA Corporation
URL : http://www.toa.jp/
SPECIFICATIONS
Rated Input
Rated Impedance
Pre-set Impedance
Sensitivity
Frequency Response
Speaker Component
Ceiling Mounting Hole
Finish
Dimensions
Weight
Accessory
PC-643S PC-645R PC-644S PC-646R
6 W (for 100 V Line), 3 W (for 70 V Line)
100 V line: 1.7 kΩ (6 W), 3.3 kΩ (3 W), 6.7 kΩ (1.5 W), 13 kΩ (0.8 W)
70 V line: 1.7 kΩ (3 W), 3.3 kΩ (1.5 W), 6.7 kΩ (0.8 W), 13 kΩ (0.4 W)
6.7 kΩ (1.5 W/100 V line, 0.8 W/70 V line)
90 dB (1 m, 1 W, 330 – 3,300 Hz Pink noise)
100 – 12,000 Hz
12 cm dynamic cone-type speaker
ø143 mm ø150 mm ø143 mm ø150 mm
ABS resin panel, off-white (RAL 9010 or equivalent color) ABS resin frame, aluminum net, off-white
(RAL 9010 or equivalent color)
200 x 200 x 11 (D)* mm ø191 x 8.5 (D)* mm 200 x 200 x 15 (D)* mm ø191 x 10 (D)* mm
+ 74 (D) mm + 74 (D) mm + 74 (D) mm + 74 (D) mm
640 g 550 g 660 g 560 g
Wood screw × 4 Wood screw × 3 Wood screw × 4 Wood screw × 3
*Exposed section
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1
-
2
-
3
-
4
