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

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    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