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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

 

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