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WF138WA04 OEM only

WF138WA04 is the 8 ohm version of WF138WA02, 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 ensure 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 flux stabilizing ring.
WF138WA04 is a good choice for compact 2-way speaker systems.

FEATURES

WF138WA04
  • 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 1” 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

WF138WA04-SPL+imp

NOMINAL SPECIFICATIONS

Nominal size

[inch.]

Nominal impedance

[ohm]

Recommended upper frequency limit

3.5 

[kHz]

Recommended cabinet volume (ported design)

6 - 8 

[lit.]

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

86.5 

[dB]

Voice coil diameter

32.5 

[mm]

Voice coil height

11 

[mm]

Air gap height

5.0 

[mm]

Voice coil resistance, RDC

6.3 

[ohm]

Voice coil inductance

0.32 

[mH]

Magnet weight

400 

[g]

Effective radiating area, Sd

95 

[sq.cm]

Power handling, continuous, IEC 268-5

55 

[W]

Resonance freq., Fs

66 

[Hz]

Moving mass, incl. air

9.7 

[g]

Force factor, Bxl

6.4 

[Tm]

Mechanical Q, Qm

8.5 

 -

Electrical Q, Qe

0.64 

 -

Total Q, Qt

0.59 

 -

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

TERMINAL NOMINAL DIMENSIONS (mm)

Terminals-dimensions

AVAILABLE EVALUATION KITS USING WF138WA04

Eval. kit 2
    2 x 5”, 2.5-way Hi-Fi bookshelf, using tweeter TW030WA01 and mid/woofer 2 x WF138WA04

PACKAGING INFORMATION

Part no. WF138WA04-01

Individual packaging (one piece per box)

Part no. WF138WA04-02

Bulk packaging

 

Specifications are subject to change without any further notice.
Copyright © 2006-2018 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

WF138WA02 data sheetDownload PDF data sheet
(142KB)

 

 

 

 

 

 

Evaluation kits

 

Electronic data download

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