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WF152BD05/06/07/08     6 die cast, paper/glass fiber cone mid/woofers

 

 

 

 

Balanced-Drive-120pix

The 6” transducers WF152BD05 (round, 4 ohm), WF152BD07 (truncated, 4 ohm), WF152BD06 (round, 8 ohm), and WF152BD08 (truncated, 8 ohm) were designed as high performance bass and midrange units for compact monitors and high-end hi-fi speakers.

Frequency resp.
Specifications
Dimensions
Ordering info

FEATURES

  • Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
  • Copper cap on center pole to reduce voice coil inductance and to minimize variations in voice coil inductance as a function of voice coil position
  • Cone made of a new paper/glass fiber mix with improved consistency and stability
  • Rigid die cast alu chassis with extensive venting for lower air flow speed reducing audible distortion
WF152BD05_06_photo

Above: Round version (WF152BD05, WF152BD06)
Below: Truncated version (WF152BD07, WF152BD08)

WF152BD07_08_photo
  • Vented voice coil former for reduced distortion and compression
  • Vented center pole with dual flares for reduced noise level at large cone excursions
  • Heavy-duty black fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
  • Large motor with 1” voice coil diameter for better control and power handling
  • Built-in alu field-stabilizing ring for reduced distortion at high levels
  • Low-loss suspension (high Qm) for better reproduction of details and dynamics
  • Black motor parts for better heat transfer to the surrounding air
  • Conex spider for better durability under extreme conditions
  • Gold plated terminals to ensure long-term trouble free connection

FREQUENCY RESPONSE

WF152BD05_07-SPL-&-IMP-resp

Measuring conditions, SPL
Driver mounting: Flush in infinite
     baffle, back side open  (no cabinet)
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.

Measuring conditions, impedance
Driver mounting: Free air, no baffle,
     back side open (no cabinet)
Input signal: Semi-current-drive,
     nominal current 2 mA
Smoothing: None

WF152BD06_08-SPL-&-IMP-resp

Measuring conditions, SPL
Driver mounting: Flush in infinite
     baffle, back side open  (no cabinet)
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.

Measuring conditions, impedance
Driver mounting: Free air, no baffle,
     back side open (no cabinet)
Input signal: Semi-current-drive,
     nominal current 2 mA
Smoothing: None

NOMINAL SPECIFICATIONS

Notes

  Parameter

WF152BD05/07

WF152BD06/08

Unit

Before burn-in

After burn-in

Before burn-in

After burn-in

 

Nominal size

6

6

[inch.]

 

Nominal impedance

4

8

[ohm]

 

Recommended max. upper frequency limit

3

3

[kHz]

1, 4

Sensitivity, 2.83V/1m (average SPL in range 300 - 1,000 Hz)

90

87

[dB]

2, 4

Power handling, short term, IEC 268-5, no additional filtering

 

 

[W]

2, 4

Power handling, long term, IEC 268-5, no additional filtering

 

 

[W]

2, 4

Power handling, continuous, IEC 268-5, no additional filtering

70

70

[W]

 

Effective radiating area, Sd

93

93

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

50

44.5

51.5

46

[Hz]

 

Moving mass, incl. air (free air, no baffle), Mms

13.5

12.8

[g]

3, 4

Force factor, Bxl

6.35

8.0

[N/A]

3, 4, 6

Suspension compliance, Cms

0.75

0.94

0.75

0.94

[mm/N]

3, 4, 6

Equivalent air volume, Vas

9.2

11.5

9.2

11.5

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.41

0.46

0.41

0.46

[Ns/m]

3, 4, 6

Mechanical Q, Qms

10.3

8.2

10.1

8.0

[-]

3, 4, 6

Electrical Q, Qes

0.34

0.30

0.41

0.36

[-]

3, 4, 6

Total Q, Qts

0.33

0.29

0.39

0.35

[-]

4

Voice coil resistance, RDC

3.2

6.3

[ohm]

5

Voice coil inductance, Le (measured at 10 kHz)

0.11

0.19

[mH]

 

Voice coil inside diameter

32

32

[mm]

 

Voice coil winding height

14

14

[mm]

 

Air gap height

5

5

[mm]

 

Theoretical linear motor stroke, Xmax

4.5

4.5

[mm]

 

Magnet weight

550

550

[g]

 

Total unit net weight excl. packaging

1.44

1.44

[kg]

3, 4, 5

Krm

51

74

[mohm]

3, 4, 5

Erm

0.40

0.41

[-]

3, 4, 5

Kxm

114

195

[mH]

3, 4, 5

Exm

0.29

0.28

[-]

Note 1

Measured in infinite baffle.

Note 2

Tested in free air (no cabinet).

Note 3

Measured using a semi-constant current source, nominal level 2 mA.

Note 4

Measured at 25 deg. C

Note 5



 

It is generally a rough simplification to assume that loudspeaker transducer voice coils exhibit the characteristics of an inductor. Instead it is a far more accurate approach to use the more advanced model often referred to as the “Wright empirical model”, also used in LEAP-4 as the TSL model (www.linearx.com), involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper (PDF) here.

Note 6

 

After burn-in specifications are measured 12 hours after exciting the transducer by a 20 Hz sine wave for 2 hours at level 10/14.1 VRMS (4/8 ohm version). The unit is not burned in before shipping.
 

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

WF152BD05/06 outline drawing
WF152BD05_06-outline-drawing

Truncated dimension
(other dimensions as round version)

Truncated-outline

TERMINAL NOMINAL DIMENSIONS (mm)

Terminals-dimensions

PACKAGING AND ORDERING INFORMATION

Part no. WF152BD05-01

4 ohm version, round, individual packaging (one piece per box)

Part no. WF152BD05-02

4 ohm version, round, bulk packaging

Part no. WF152BD06-01

8 ohm version, round, individual packaging (one piece per box)

Part no. WF152BD06-02

8 ohm version, round, bulk packaging

Part no. WF152BD07-01

4 ohm version, truncated, individual packaging (one piece per box)

Part no. WF152BD07-02

4 ohm version, truncated, bulk packaging

Part no. WF152BD08-01

8 ohm version, truncated, individual packaging (one piece per box)

Part no. WF152BD08-02

8 ohm version, truncated, bulk packaging

Latest update: September 19, 2018

 

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

WF152BD05/06 specificationsPDF data sheet

 

Balanced Drive technical paperBalanced Drive technical paper (2.34 MB)

 

 

 

 

List of all mid/woofers

 

All Wavecor drive units

 

Technical pages

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