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WF138WA02 5½" paper cone mid/woofer, 4 ohm

WF138WA02 is a mid/woofer designed for demanding bass and midrange applications. It works equally well for high-end hi-fi, high quality home theater systems, and top multimedia setups.
It is powered by a large 90mm magnet structure that ensures good efficiency and optimal T/S parameters.
The large 32mm voice coil ensures high power handling - thermally and mechanically
The optimized paper cone ensures wide bandwidth and low distortion. Distortion is further reduced by efficient venting and an alu stabilizing ring.
WF138WA02 is a good choice for compact 2-way speaker systems.

FEATURES
WF138WA02-pic
  • Built-in alu field stabilizing ring for reduced high-level distortion
  • Vented voice coil former for reduced distortion and compression
  • Vented chassis for lower air flow speed reducing audible distortion
  • Heavy-duty black fiber glass voice coil bobbin to increase power handling and reduce mechanical losses resulting in better dynamic performance and low-level details
  • Large motor system with 1¼” voice coil diameter and 90mm magnet for better control and efficiency
  • Long linear stroke motor for reduced distortion at high levels
  • Linear suspension with specially designed CONEX damper (spider) for long durability under extreme operating conditions
  • Gold plated terminals to prevent oxidation for long-term reliable connection

FREQUENCY RESPONSE
WF138WA02-SPL-&-IMP

NOMINAL SPECIFICATIONS

Nominal size

5½

[inch.]

Nominal impedance

4

[ohm]

Recommended upper frequency limit

3.5

[kHz]

Recommended cabinet volume (ported design)

6½ - 8

[lit.]

Sensitivity, 2.83V/1m, (average 300-3,500Hz)

89

[dB]

Voice coil diameter

32.5

[mm]

Voice coil height

11

[mm]

Air gap height

5.0

[mm]

Voice coil resistance, RDC

3.2

[ohm]

Voice coil inductance

0.20

[mH]

Magnet weight

400

[g]

Effective radiating area, Sd

95

[sq.cm]

Power handling, continuous, IEC 268-5

55

[W]

Resonance freq., Fs

64

[Hz]

Moving mass, incl. air

10.4

[g]

Force factor, Bxl

5.2

[Tm]

Mechanical Q, Qm

8.5

 -

Electrical Q, Qe

0.49

 -

Total Q, Qt

0.46

 -

Suspension compliance, Cms

0.60

[mm/N]

Equiv. air volume, Vas

7.6

[lit.]

Total unit net weight

1.03

[kg]

Specifications are before burn-in

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)
WF138WA02-outline2

PACKAGING INFORMATION

Part no. WF138WA02-01

Individual packaging (one piece per box)

Part no. WF138WA02-02

Bulk packaging
 

Specifications are subject to change without any further notice.
Copyright © 2006-2008 by Wavecor Ltd., Guangzhou, China. All rights reserved.
 
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MORE INFO

WF138WA02 data sheetDownload PDF data sheet
(142KB)

 

pdf_iconCross section/ exploded view
(420KB)

 

EDrawings-icon3D model,
eDrawing
(1.5MB .htm file

 

Evaluation kits
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