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APPLICATION:
• Ideal for high output, high power subwoofers, with band pass or port loaded enclosure designs.
21NPW
SPECS PDF
DRAWING PDF
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NEODYMIUM WOOFER
Ordering code: 21NPW-018
CONT. POWER
SENS.
Fs
Freq. Range
VC Dia.
IN-OUT WOUND
VC Wire
Cone /
Surround
Magnet
Type
3,600 WATTS
97 dB
34 Hz
25-
1,500 Hz
5.3"
1IN-3OUT
COPPER
PAPER w. CF
FABRIC
NEO
The 21NPW is a high efficiency, (97 dB 1watt / 1 meter) 21-inch woofer with incredibly linear frequency response characteristics, extreme high power handling capability while generating low harmonic distortion artifacts. The 21NPW uses a lightweight carbon fiber loaded cone assembly along with a high excursion triple roll constant geometry surround. This combination provides remarkable strength, high efficiency and a peak to peak maximum excursion of 50mm (2in).
Power Handling
At the core of the 21NPW is it’s voice coil technology featuring a composite Polyimide former material capable of withstanding peak temperatures in excess of 350C, well beyond the thermal requirements of modern professional audio systems. The 21NPW delivers incredible performance.
REDCATT has implemented a triple layer/silicone spider design to ensure long term Fs memory, consistency and diminish anomalies associated with spider deterioration.
GENERAL SPECIFICATIONS:
Nominal Diameter
533 mm (21 in.)
Rated Impedance
4 ohm
Power Handling
AES Power
1,800 watts
PROGRAM Power
3,600 watts
PEAK Power
7,800 watts
Power Compression
@ -10dB
0.7 dB
@ 0dB
1.5 dB
@ Max. Power
2.2 dB
Max. Recommended X-OVER Freq.
150 Hz
Recommended Enclosure Volume
150 - 500 Liters
Cone Design / Cone Material
Strght. Gmtry, REDCATT Pulp
Voice Coil Diameter / Winding
5.3"
Voice coil Winding Height
32.8 mm
Front Plate Thickness
12 mm
T/S Parameters:
Fs
34 Hz
Re
3 Ohm
Sd
1665 cm2 (258 in.2)
Qms
12
Qes
0.32
Qts
0.31
Vas
168 Liters
Mms
480 g
Bl product (Force Factor)
32 Tm
Peak To Peak Displacement
26 mm
Le (mH @ 1kHz)
1.1
Mechanical Parameters:
Overall Diameter
546 mm (21.49 in.)
No. Of Mounting Holes
8
Bolt Circle Diameter
520 mm (20.47 in.)
Front Mount Baffle cutout
498 mm (19.6 in.) Nominal
Rear Mount Baffle cutout
510 mm (20.08 in.) Nominal
Total Depth
260 mm (10.23 in.)
Flange and gasket thickness
22 mm (0.86 in.)
Packaging info:
Net Weight
13.4 kg (29.5 lbs.)
Shipping Weight
15.6 kg (34.3 lbs.)
Packaging Dimensions
575x575x295cm