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    Wavecor Speaker Driver WF182BD04 - 8 Ohm 7in. Die Cast Paper Cone Mid-Woofer

    Thumbnail Filmstrip of Wavecor Speaker Driver WF182BD04 - 8 Ohm 7in. Die Cast Paper Cone Mid-Woofer Images

      Purchase Wavecor Speaker Driver WF182BD04 - 8 Ohm 7in. Die Cast Paper Cone Mid-Woofer

      SKU: Wavecor-Mid-Woofer-WF182BD04 Wavecor Speaker Driver WF182BD04 - 8 Ohm 7in. Die Cast Paper Cone Mid-Woofer

      $225.00 each
      Brand: Wavecor
      Quantity in Basket:  None

       

      3 available.
       


      Wavecor Speaker Driver - WF182BD04 - 8 Ohm 7" Die Cast Paper Cone Mid-Woofer

      Description
      The 7" transducers WF182BD03 and WF182BD07 (both 4 ohm) and WF182BD04 and WF182BD08 (both 8 ohm) were designed as high performance bass and midrange units for monitors and high-end hi-fi speakers. They offer outstanding deep bass performance and dynamic and detailed midrange.

       

      Features

      • Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced 2nd 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
      • 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 1½” 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 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 7 inch
        Nominal impedance 8 Ohm
        Recommended max upper frequency limit
      		 2.5 kHz
      1 Sensitivity, 2.83V/1m (average SPL in range 200-1000 kHz) 88 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 80 W
        Effective radiating area, Sd 131 cm2
      3, 6 Resonance frequency (free air, no baffle), Fs 40 33.4 Hz
        Moving mass, incl. air (free air, no baffle), Mms 16.1 g
      3 Force factor, Bxl 8.5 -
      3, 6 Suspension compliance, Cms 1.0 1.33 mm/N
      3, 6 Equivalent air volume, Vas 24.4 32.4 lit
      3, 6 Mechanical resistance, Rms 0.37 0.43 Ns/m
      3, 6 Mechanical Q, Qms 11 8.2 -
      3, 6 Electrical Q, Qes 0.35 0.30 -
      3, 6 Total Q, Qts 0.34 0.29 -
      4 Voice coil resistance, RDC 6.3 Ohm
      5 Voice coil inductance, Le (measured at 10 kHz) 0.14 mH
        Voice coil inside diameter 39 mm
        Voice coil winding height 16 mm
        Air gap height 5 mm
        Magnet weight 885 g
        Total unit net weight excl. packaging 2.3 kg
      3, 5 Krm 54 mOhm
      3, 5 Erm 0.40 -
      3, 5 Kxm 347 mH
      3, 5 Exm 0.14 -
      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 20 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 10/14.1 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.)
      Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)

       

      Terminal Nominal Dimensions

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