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Notes

:

*  The  power  capaticty  is  determined  according  to  AES2-1984  (r2003)  standard.  Program 
power is defined as the transducer’s ability to handle normal music program material.

** T-S parameters are measured after an exercise period using a preconditioning power test. 
The measurements are carried out with a velocity-current laser transducer and will reflect the 
long term parameters (once the loudspeaker has been working for a short period of time).

*** The Xmax is calculated as (Lvc - Hag)/2 + (Hag/3,5), where Lvc is the voice coil length and 

Hag is the air gap height.

Nominal diameter
Rated impedance
Minimum impedance
Power capacity*
Program power
Sensitivity
Frequency range
Recom. enclosure vol.
Voice coil diameter
Magnetic assembly weight
Bl factor
Moving mass
Voice coil length
Air gap height
X

damage

 (peak to peak)

540 mm      21 in

8 Ω

5,4 Ω

1.400 W

AES

2.800 W

98,5 dB   @ 1W @ Z

N

25 - 1.800 Hz

100 / 250 l     3,5 / 8,75 ft

3

100 mm          4 in

14,4 kg     31,8 lb

28,2 N/A
0,298 kg

25 mm
12 mm
55 mm

Overall diameter
Bolt circle diameter
Baffle cutout diameter:
 - Front mount
 - Rear mount
Depth
Volume displaced by driver
Net weight
Shipping weight

550 mm      21,65 in
526 mm      20,71 in

494 mm      19,45 in

511 mm      20,12 in

242 mm        9,53 in

20 l        0,71 ft

3

19,9 kg      43,87 lb
22,6 kg        50,0 lb

KEY FEATURES

THIELE-SMALL PARAMETERS**

TECHNICAL SPECIFICATIONS

MOUNTING INFORMATION

DIMENSION DRAWINGS

Resonant frequency, f

s

D.C. Voice coil resistance, R

e

Mechanical Quality Factor, Q

ms

Electrical Quality Factor, Q

es

Total Quality Factor, Q

ts

Equivalent Air Volume to C

ms

, V

as

Mechanical Compliance, C

ms

Mechanical Resistance, R

ms

Efficiency, η

0

 

Effective Surface Area, S

d

 

Maximum Displacement, X

max

 ***

Displacement Volume, V

d

Voice Coil Inductance, L

e

 

30 Hz

5,2 Ω

7,44
0,36
0,34

401,5 l 

94 

µ

m / N

7,51 kg / s

2,83 %

0,1734 m

2

10 mm

1.729 cm

3

1,3 mH

21PW1400/Fe

LOW FREQUENCY TRANSDUCER

PW Series

●  High power handling: 1400 W

AES

●  Malt Cross

®

 Cooling System

●  Low power compression looses
●  High sensitivity: 98,5 dB
●  FEA optimized ferrite magnetic circuit
●  Designed with MMSS technology for high control, linearity and 

low harmonic distortion

●  Optimized nonlinear parameters
●  Waterproof cone with treatment for both sides of the cone
●  4” DUO double layer inner/outer voice coil
●  Aluminium demodulating ring
●  Extended controlled displacement: X

max

 ± 10 mm

●  Massive mechanical displacement capability: X

damage

 ± 55 mm