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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.
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Possible UV light influence
For mid/woofer models WF152BD05, WF152BD06, WF152BD07, WF152BD08, we have received feedback of cases, where UV light (sunlight) has caused the cone colours to fade.
In order to offer alternatives that will not be affected by UV light, we are now offering versions with black coated cones, WF152BD13/14/1516.
The only difference is the cone coating.
Specifications are identical coated/non-coated.
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Frequency resp.
Specifications
Dimensions
Ordering info
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FEATURES
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- 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
- 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 1.25” 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
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FREQUENCY RESPONSE
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NOMINAL SPECIFICATIONS
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Notes
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Parameter
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WF152BD05/07
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WF152BD06/08
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Unit
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Before burn-in
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After burn-in
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Before burn-in
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After burn-in
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Nominal size
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6
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6
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[inch.]
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Nominal impedance
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4
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8
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[ohm]
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Recommended max. upper frequency limit
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3
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3
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[kHz]
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1, 4
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Sensitivity, 2.83V/1m (average SPL in range 300 - 1,000 Hz)
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90
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87
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[dB]
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2, 4
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Power handling, short term, IEC 268-5, no additional filtering
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230
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230
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[W]
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2, 4
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Power handling, long term, IEC 268-5, no additional filtering
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200
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200
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[W]
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2, 4
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Power handling, continuous, IEC 268-5, no additional filtering
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100
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100
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[W]
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Effective radiating area, Sd
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93
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93
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[sq.cm]
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3, 4, 6
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Resonance frequency (free air, no baffle), Fs
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50
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44.5
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51.5
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46
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[Hz]
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Moving mass, incl. air (free air, no baffle), Mms
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13.5
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12.8
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[g]
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3, 4
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Force factor, Bxl
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6.35
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8.0
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[N/A]
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3, 4, 6
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Suspension compliance, Cms
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0.75
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0.94
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0.75
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0.94
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[mm/N]
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3, 4, 6
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Equivalent air volume, Vas
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9.2
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11.5
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9.2
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11.5
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[lit.]
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3, 4, 6
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Mechanical resistance, Rms
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0.41
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0.46
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0.41
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0.46
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[Ns/m]
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3, 4, 6
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Mechanical Q, Qms
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10.3
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8.2
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10.1
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8.0
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[-]
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3, 4, 6
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Electrical Q, Qes
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0.34
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0.30
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0.41
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0.36
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[-]
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3, 4, 6
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Total Q, Qts
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0.33
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0.29
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0.39
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0.35
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[-]
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4
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Voice coil resistance, RDC
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3.2
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6.3
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[ohm]
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5
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Voice coil inductance, Le (measured at 10 kHz)
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0.11
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0.19
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[mH]
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Voice coil inside diameter
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32
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32
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[mm]
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Voice coil winding height
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14
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14
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[mm]
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Air gap height
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5
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5
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[mm]
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Theoretical linear motor stroke, Xmax
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+/-4.5
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+/-4.5
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[mm]
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Magnet weight
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550
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550
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[g]
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Total unit net weight excl. packaging
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1.44
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1.44
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[kg]
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3, 4, 5
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Krm
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51
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74
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[mohm]
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3, 4, 5
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Erm
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0.40
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0.41
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[-]
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3, 4, 5
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Kxm
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114
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195
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[mH]
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3, 4, 5
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Exm
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0.29
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0.28
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[-]
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Note 1
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Measured in infinite baffle.
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Note 2
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Tested in free air (no cabinet).
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Note 3
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Measured using a semi-constant current source, nominal level 2 mA.
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Note 4
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Measured at 25 deg. C
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Note 5
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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.
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Note 6
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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.
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OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)
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Truncated dimension
(other dimensions as round version)
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TERMINAL NOMINAL DIMENSIONS (mm)
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PACKAGING AND ORDERING INFORMATION
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Part no. WF152BD05-01
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4 ohm version, round, individual packaging (one piece per box)
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Part no. WF152BD05-02
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4 ohm version, round, bulk packaging
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Part no. WF152BD06-01
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8 ohm version, round, individual packaging (one piece per box)
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Part no. WF152BD06-02
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8 ohm version, round, bulk packaging
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Part no. WF152BD07-01
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4 ohm version, truncated, individual packaging (one piece per box)
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Part no. WF152BD07-02
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4 ohm version, truncated, bulk packaging
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Part no. WF152BD08-01
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8 ohm version, truncated, individual packaging (one piece per box)
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Part no. WF152BD08-02
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8 ohm version, truncated, bulk packaging
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Latest update: January 29, 2025
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Specifications are subject to change without any further notice.
Copyright © by Wavecor Ltd., China. All rights reserved.
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MORE INFO
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