21” / 530 mm 98 dB 30 Hz - 1 kHz 6.0” / 152 mm

21” / 530 mm 98 dB 30 Hz - 1 kHz 6.0” / 152 mm
PDN.2151
21” / 530 mm
NOMINAL DIAMETER
| Sub Bass Driver
1000 w (A.E.S.)
POWER HANDLING
98 dB
30 Hz - 1 kHz
SENSITIVITY
FREQUENCY RESPONSE
SPOT COLOUR (Black + custom silver)
PRODUCT FEATURES
10.5 mm Xmax
FREQUENCY RESPONSE AND IMPEDANCE CURVE
Heavy-duty cast aluminium chassis for increased rigidity.
Power compression 2dB at rated power.
MONO
6.0” / 152 mm
VOICE COIL DIAMETER
300
Ohms (Ω)
dB (1W* - 1m)
+110
250
+100
200
+90
150
+80
100
+70
50
+60
A B/L in excess of 35 T/m.
Double suspension system.
Suitable for horn loaded or bass reflex designs.
Lightweight neodymium magnet.
0
20
50
100
200
500
1k
2k
5k
10k
20k
+50
Hz
*2.83V. Half space response measured in a 975 Litre sealed enclosure.
THIELE SMALL PARAMETERS (8Ω MODEL)
SPECIFICATIONS
DIMENSIONS
Nominal Diameter
530 mm / 21”
Fs
31.44 Hz
Vas
303.35 litres
Overall Diameter
550 mm
Voice Coil Diameter
152 mm / 6.0”
Re
5.35 Ω
Mms
342.86 g
Width Across Flats
532 mm
Available Impedances
4 Ohms/ 8 Ohms/ 16 Ohms
Qms
18.3
Sd
1698.23 cm2
Flange Height
14 mm
Power Rating
1000 w (A.E.S.)
Qes
0.28
Cms
74.67 μm/N
Depth (Excl. Flange)
204 mm
Peak Power (6dB Crest Factor)
4000 w (A.E.S.)
Qts
0.28
BL
35.86 T/m
Magnet Diameter
223 mm
Sensitivity (1w - 1m)
98 dB
Le
1.9 mH
Xmax
10.5 mm
Frequency Range
30 Hz - 1 kHz
L2
3.79 mH
Vd
1.76 litres
MOUNTING INFORMATION
Recommended Enclosure Volume
130 - 350 Litres
R2
11.28 Ω
Ref. Efficiency
4.81 %
Chassis Shoulder Diameter
492 mm
Resonance
31.44 Hz
Outer Bolt Circle
6x M6 on 528 mm PCD
Voice Coil Winding Depth
30 mm / 1.18”
Inner Bolt Circle
N/A
Magnet Gap Depth
15 mm / 0.59”
Flux Density
1.1 Tesla
Magnet Material
Neodymium
Voice Coil Material
Copper
Former Material
Glass Fibre
Dust Dome Material
Paper
Suspension Material
Dual Fabric
Cone / Surround Material
Paper / Fabric
*1 Power compression is the reduction of sensitivity at the specified power. Higher power
ratings do not necessarily give a proportionate increase in SPL therefore the maximum SPL of
the driver may significantly exceed that of other manufacturers with high power ratings.
1. A.E.S. Standard (30 to 300 Hz).
2. A.E.S. Recommended Practice.
3. Thiele - Small Parameters follow a 1000 Watt A.E.S. preconditioning period.
Please note that frequency response measurements are supplied for
comparison purposes only and are not a measure of the low frequency
performance which may be achievable in a fully optimised system.
WEIGHT
Nett Weight
16.3 Kg / 35.93 lb.
Shipping Weight
21.25 Kg / 46.85 lb.
© 2014, Precision Devices International Ltd. We operate a policy of continuous research and development and as such published specifications are subject to change without notice.
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