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    Wavecor Speaker Driver WF182BD03 - 4 Ohm 7in. Die Cast Paper Cone Mid-Woofer

    Thumbnail Filmstrip of Wavecor Speaker Driver WF182BD03 - 4 Ohm 7in. Die Cast Paper Cone Mid-Woofer Images

      Purchase Wavecor Speaker Driver WF182BD03 - 4 Ohm 7in. Die Cast Paper Cone Mid-Woofer

      SKU: Wavecor-Mid-Woofer-WF182BD03 Wavecor Speaker Driver WF182BD03 - 4 Ohm 7in. Die Cast Paper Cone Mid-Woofer

      $225.00 each
      Brand: Wavecor
      Quantity in Basket:  None

       

      Sorry, we are currently sold out of:
      Wavecor Speaker Driver WF182BD03 - 4 Ohm 7in. Die Cast Paper Cone Mid-Woofer.
      More stock is due soon!
       

      Wavecor Speaker Driver - WF182BD03 - 4 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 even order harmonic distortion
      • Copper cap on centre pole to reduce voice coil inductance and to minimise 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 centre pole with dual flares for reduced noise level at large cone excursions
      • Heavy-duty black fibre 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-stabilising 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

       

      Nominal Specifications

      Parameter Before Burn-In After Burn-In Unit
      Nominal size 7 [inch.]
      Nominal impedance 4 [ohm]
      Recommended max. upper frequency limit 2.5 [kHz]
      Sensitivity, 2.83V/1m (average SPL in range 200 - 1,000 Hz)1 91 [dB]
      Power handling, short term, IEC 268-5, no additional filtering2 - [W]
      Power handling, long term, IEC 268-5, no additional filtering2 - [W]
      Power handling, continuous, IEC 268-5, no additional filtering2 80 [W]
      Effective radiating area, Sd 131 [cm²]
      Resonance frequency (free air, no baffle), Fs3, 6 39 33.8 [Hz]
      Moving mass, incl. air (free air, no baffle), Mms 16.7 [g]
      Force factor, Bxl3 6.75 [N/A]
      Suspension compliance, Cms3, 6 1.0 1.33 [mm/N]
      Equivalent air volume, Vas3, 6 24.4 32.4 [lit.]
      Mechanical resistance, Rms3, 6 0.37 0.43 [Ns/m]
      Mechanical Q, Qms3, 6 11 8.2 [-]
      Electrical Q, Qes3, 6 0.30 0.26 [-]
      Total Q, Qts3, 6 0.29 0.25 [-]
      Voice coil resistance, RDC4 3.3 [ohm]
      Voice coil inductance, Le (measured at 10 kHz)5 0.088 [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]
      Krm3, 5 33 [mohm]
      Erm3, 5 0.42 [-]
      Kxm3, 5 157 [mH]
      Exm3, 5 0.19 [-]
      • 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, involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper here at our website.
      • Note 6: After burn-in specifications are measured 12 hours after exit from initial burn-in run.

       

      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