Local Stock - (02) 4872-1553 or (03) 9859-0388
Sign In About Us Contact Us Frequent Questions
0411-881-967
0413-057-272
0
Product Search
    0
    Secure Checkout
    Wavecor Speaker Driver WF120BD03 - 4 Ohm 5in. Die Cast Paper Cone Mid Woofer

    Thumbnail Filmstrip of Wavecor Speaker Driver WF120BD03 - 4 Ohm 5in. Die Cast Paper Cone Mid Woofer Images

      Purchase Wavecor Speaker Driver WF120BD03 - 4 Ohm 5in. Die Cast Paper Cone Mid Woofer

      SKU: Wavecor-Mid-Woofer-WF120BD03 Wavecor Speaker Driver WF120BD03 - 4 Ohm 5in. Die Cast Paper Cone Mid Woofer

      $95.00 each
      Brand: Wavecor
      Quantity in Basket:  None

       

      8 available.
       


      Wavecor Speaker Driver - WF120BD03 - 4 Ohm 5" Die Cast Paper Cone Mid Woofer

      Description
      The 4¾" transducers WF120BD03 (4 ohm) and WF120BD04 (8 ohm) were designed as high performance bass and midrange units for very compact monitors and high-end hi-fi speakers. The only difference between WF120BD03 and WF120BD07 is the shape of the mounting flange of the frames. WF120BD04 and WF120BD08 differ in the same way.

       

      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
      • Black coated semi-air-dried paper cone
      • Rigid die cast alu chassis with extensive venting for lower air flow speed reducing audible distortion Large motor for better control and power handling
      • Vented voice coil former 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
      • 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 SPL and Impedance Response Graphs


      Loudspeaker Frequency Response Graph
      Measuring conditions, SPL
      Driver mounting: Flush in infinite baffle
      Microphone distance: 1.0 m
      Input level: 2.83 VRMS
      Smoothing: 1/6 oct.


      Loudspeaker Impedance Response Graph
      Measuring conditions, impedance
      Driver mounting: Free air, no baffle
      Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
      Smoothing: None

       

      Technical Specifications

      Notes Parameter   Value Unit
          Before
      Burn-in      		 After Burn-in  
        Nominal size 4¾ Inch
        Nominal impedance 4 Ohm
        Recommended frequency range
      		 4 kHz
      1 Sensitivity, 2.83V/1m (average SPL in range 300 - 1000 kHz) 88.5 dB
      2 Power handling, short term, IEC 268-5, 6 kHz no additional filtering   W
      2 Power handling, long term, IEC 268-5, 6 kHz no additional filtering   W
      2 Power handling, continuous, IEC 268-5, 6 kHz no additional filtering 50 W
        Effective radiating area, Sd 50 cm2
      3, 6 Resonance frequency (free air, no baffle), Fs 70 61.5 kHz
        Moving mass, incl. air (free air, no baffle), Mms 6.55 g
      3 Force factor, Bxl 4.5 -
      3, 6 Suspension compliance, Cms 0.79 1.03 mm/N
      3, 6 Equivalent air volume, Vas 3.25 4.25 ml
      3, 6 Mechanical resistance, Rms 0.49 0.42 Ns/m
      3, 6 Mechanical Q, Qms 5.9 6.0 -
      3, 6 Electrical Q, Qes 0.46 0.40 -
      3, 6 Total Q, Qts 0.42 0.37 -
      4 Voice coil resistance, RDC 3.2 Ohm
      5 Voice coil inductance, Le (measured at 10 kHz) 0.086 uH
        Voice coil inside diameter 26 mm
        Voice coil winding height 12 mm
        Air gap height 4 mm
        Magnet weight 430 g
        Total unit net weight excl. packaging 1.04 kg
      3, 5 Krm 27 mOhm
      3, 5 Erm 0.43 -
      3, 5 Kxm 198 mH
      3, 5 Exm 0.17 -
      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 exiting the transducer by a 20 Hz sine wave for 2 hours at level 7.75/11 VRMS (4/8 ohm version). The unit is not burned in before shipping

       

      Driver Nominal Dimensions


      Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)

       

      Terminal Nominal Dimensions


      Loudspeaker Driver Terminal Dimensions and Measurements - all dimensions in mm (approx.)
      Thickness, both terminals: 0.5 mm
      Terminal plating: Gold