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Wavecor WF120BD12 4-3/4" Kevlar/Carbon Fiber Cone Midwoofer 8 Ohm

WavecorPart # 298-1228
Model: WF120BD12

The 4.75″ WF120BD11 transducer was developed as a high-performance bass and midrange driver for compact monitor speakers and premium hi-fi systems.

Key Features

  • Gold-plated terminals provide a reliable, long-lasting electrical connection Ask ChatGPT
  • Inverted and vented center dome design minimizes compression
  • Sturdy die-cast aluminum chassis with extensive venting reduces airflow speed and cuts audible distortion
  • Black fiberglass voice coil former minimizes mechanical losses for improved dynamics and detail resolution
  • Integrated aluminum field-stabilizing ring reduces distortion at higher output levels
  • Conex spider increases durability under demanding conditions
  • Gold-plated terminals provide a reliable, long-lasting electrical connection
Your Price: $117.00
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Overview

Wavecor WF120BD12 4-3/4" Kevlar/Carbon Fiber Cone Midwoofer 8 Ohm

Wavecor WF120BD12 4-3/4" Kevlar/Carbon Fiber Cone Midwoofer 8 Ohm

The WF120BD12 introduces a newly developed cone made of interwoven Kevlar and carbon fibers, combining low mass with exceptional rigidity and internal damping—traits that significantly enhance clarity and accuracy in the midrange. Its Balanced Drive motor structure delivers symmetrical force across the coil’s travel, dramatically reducing even-order harmonic distortion. A vented, inverted center dome minimizes compression, while a copper cap on the center pole reduces voice coil inductance and stabilizes it across excursion for smoother frequency response. The large 1" voice coil is wound on a black fiberglass former to lower mechanical losses, supported by a rigid die-cast aluminum chassis with extensive venting to maintain low air flow speeds and reduce audible distortion. To maintain fidelity at high levels, the motor incorporates an aluminum field-stabilizing ring and thermally optimized black-coated components, while a low-loss suspension and CONEX spider preserve dynamic response and durability over time. Gold-plated terminals complete the design with long-term connection reliability.

Measuring conditions, SPL
Driver mounting: Flush in infinite baffle, back side open (no cabinet)
Microphone distance: 1.0 m
Input signal: 2.83 VRMS LogChirp, 64k, Hanning/2
Smoothing: 1/6 oct.

Measuring conditions, impedance
Driver mounting: Free air, no baffle, back side open (no cabinet)
Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
Smoothing: None

Measuring conditions, harmonic distortion
Driver mounting: In sealed enclosure, internal volume 2 lit.
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 6.3 VRMS
Smoothing: 1/12 oct.

Product Details

BrandWavecor
ModelWF120BD12
Part Number298-1228
UPC848864081137
Unit of MeasureEach
Weight2.7

Product Specifications

Nominal Diameter4-3/4"
Power Handling (RMS)40 Watts
Power Handling (MAX)80 Watts
Impedance8Ω
Sensitivity85dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)57.5Hz
Mechanical Q (Qms)9.3
Electromagnetic Q (Qes)0.49
Total Q (Qts)0.46
Compliance Equivalent Volume (Vas)0.14ft³
Mechanical Compliance of Suspension (Cms)1.2mm/N
Diaphragm Mass Inc. Airload (Mms)6.4g
Maximum Linear Excursion (Xmax)3mm
Surface Area of Cone (Sd)48cm²

Materials of Construction

Cone MaterialCarbon Fiber / Kevlar
Voice Coil Wire MaterialCopper
Voice Coil FormerFiberglass

Mounting Information

Overall Outside Diameter4.72"
Baffle Cutout Diameter3.54"
Depth2.52"
# Mounting Holes4

Specifications

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California Prop 65

WARNING: Cancer and Reproductive Harm

www.P65Warnings.ca.gov