Small Signal Parameters
D (m/in) | 0.38/14.96 |
Fs (Hz) | 26 |
Mmt (g/oz) | 172.42/6.08 |
Mmd (g/oz) | 150.81/5.32 |
Mair | - |
Qms | 4.33 |
Qes | 0.29 |
Qts | 0.27 |
Re (Ω) | 5.39 |
Vas (lt/ft3) | 395.56/13.96 |
BI (Tm) | 22.88 |
Cms (mm/N) | 0.22 |
Rms (kg/s) | 6.506 |
Le (mH) | 1.41 |
Mounting Information
Overall diameter (mm/in) | 462/18.19 |
Overall depth (mm/in) | 205/8.07 |
Cut-out diameter (mm/in) | 416/16.38 |
Mounting slot dimensions (mm/in) | 7 x 10/0.28 x 0.39 |
Number of mounting slots | 8 |
Mounting slot PCD range (mm/in) | 429-440/16.89-17.32 |
Unit weight (kg/lb) | 9.8/21.6 |
Packed Dimensions and Weight
Single pack size W x D x H (mm/in) | 500 x 500 x 240/19.7 x 19.7 x 9.4 |
Single pack weight (kg/lb) | 11.6/25.6 |
Multipack (24) size W x D x H (mm/in) | 1500 x 1000 x 980/59.1 x 39.4 x 38.6 |
Multipack (24) weight (kg/lb) | 278/608 |
Nominal Specifications
Nominal Diameter 18“, 460 mm
Overall Diameter 18.11“, 460 mm
Bolt Circle Diameter 17.32“, 440 mm
Baffle Cutout Diameter 16.6“, 422 mm
Depth 9.09“, 231 mm
Flange and Gasket Thickness 0.55“, 14 mm
Electrical Specifications
Minimum Impedance 7.2 Ohm
Nominal Impedance 8 Ohm
Nominal Power Handling*** 1,600 W
Maximum Power Handling**** 3,200 W
Sensitivity (1W/1m) 98 dB
Frequency Range 30 - 1500 Hz
Voice Coil Diameter 4“, 100 mm
Winding Material Copper
Former Material Glass Fiber
Winding Depth 1.23“, 31.3 mm
Magnetic Gap Depth 0.61“, 15.5 mm
Flux Density 1.05 T
THIELE & SMALL Parameters
Resonant Frequency (fs) 32 Hz
DC Resistance (Re) 5.4 Ohm
BL Product (BL) 26.7 N/A
Diaphragm Mass inc. Airload (Mms) 240 grams
Mechanical Compliance of Suspension (Cms) 0.1 mm/N
Rms 5.27 Kg/s
Electromagnetic Q (Qes) 0.37
Mechanical Q (Qms) 9.3
Total Q (Qts) 0.36
Compliance Equivalent Volume (Vas) 6.9 ft³, 195.5 dm³
Surface Area of Cone (Sd) 182“², 1,174 cm²
Maximum Linear Excursion (Xmax)* 13 mm
Xdamage** 28 mm
Coil Inductance (Le) 1.45 mH
Diaphragm mass (Mmd) 217 g
Eta Zero 1.76 %
Notes
*Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
**Maximum excursion before permanent damage
***2 Hours Test According to AES 2-1984 Rev. 2003
****Maximum power is defined as 3dB greater than nominal power
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Specifications
Nominal Diameter 545 mm (21“)
Nominal Impedance 4 Ω
Rated Power AES 1000 W
Continuous Program Power 2000 W
Sensitivity @ 1W/1m 97.0 dB
Voice Coil Diameter 100 mm (4“)
Voice Coil Winding Depth 25 mm
Magnetic Gap Depth 17 mm
Flux Density 0.94 T
Magnet Weight 536 g
Net Weight 10.5 kg
Manual/Εγχειρίδιο
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Nominal Specifications
Nominal Diameter 18“, 460 mm
Overall Diameter 18.11“, 460 mm
Bolt Circle Diameter 17.32“, 440 mm
Baffle Cutout Diameter 16.61“, 422 mm
Depth 7.65“, 194.3 mm
Flange and Gasket Thickness 0.55“, 13.9 mm
Electrical Specifications
Minimum Impedance 6.3 Ohm
Nominal Impedance 8 Ohm
Nominal Power Handling*** 1200 W
Maximum Power Handling**** 2400 W
Sensitivity (1W/1m) 98 dB
Frequency Range 35 - 1600 Hz
Voice Coil Diameter 4“, 100 mm
Winding Material Kupfer
Former Material Glass Fiber
Winding Depth 1.14“, 28.9 mm
Magnetic Gap Depth 0.47“, 12 mm
Flux Density 1.22 T
THIELE & SMALL Parameters
Resonant Frequency (fs) 35 Hz
DC Resistance (Re) 5 Ohm
BL Product (BL) 24.8 N/A
Diaphragm Mass inc. Airload (Mms) 211.8 grams
Mechanical Compliance of Suspension (Cms) 0.098 mm/N
Rms 4.19 Kg/s
Electromagnetic Q (Qes) 0.38
Mechanical Q (Qms) 11.1
Total Q (Qts) 0.37
Compliance Equivalent Volume (Vas) 6.74 ft³, 190.8 dm³
Surface Area of Cone (Sd) 181.97“², 1174 cm²
Maximum Linear Excursion (Xmax)* 12.45 mm
Xdamage** 21 mm
Coil Inductance (Le) 1.26 mH
Diaphragm mass (Mmd) 189.1 g
Eta Zero 2.1 %
Notes
*Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
**Maximum excursion before permanent damage
***2 Hours Test According to AES 2-1984 Rev. 2003
****Maximum power is defined as 3dB greater than nominal power
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- Shape Cylindrical
- Product type Cone driver
- Brand Sica
- Frequency coverage type Sub
- Dimensional category 18 inch
- Front chape Cylindrical
- Magnet type Ferrite
- Basket masterial Aluminium
- Nominal impedance 4 ohm
- Nominal power handling 700 W
- Max power handling 1400 W
- Sensitivity 97.9 dB
- Voice coil diameter 4 inch
- Flux density 1.12 T
- External diametre 462 mm
- Mounting diametre 415 mm
- Depth 203.5 mm
- Depth after front 188.5 mm
- Front thickness 15 mm
- Diamètre aimant (mm) 220 mm
- Weight 13.9 kg
- Fs 36.9 Hz
- Re 3.25 ohm
- Qes 0.29
- Qms 9.03
- Qts 0.28
- Vas 181.9 L
- Sd 1164.2 cm²
- Cms 95 µm/N
- Efficiency 3.02 %
- Xmax 6 mm
- Mms 196.2 gr
- BL 22.55 T.m
- Le 1.03 mH
- EBP 127
- Dome material Paper
- Cone material Paper
- Surround material Cloth
- Shipping weight 13.9 kg
| Weight | 10.70 kg | 9.80 kg | 12.20 kg | 10.50 kg | 7.30 kg | 14 kg |
Dimensions | N/A | N/A | N/A | N/A | N/A | N/A |
Additional information |
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Weight |
10.50 kg |
Woofer Inch |
21 Inch
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