Morel CAW428 4" Cast Frame Woofer

Morel CAW 428 4" Cast Frame Woofer

Brand:| Model: CAW 428
The Classic Advanced woofers are based on Morel's renowned MW series. This woofer features an aerodynamic Uniflow™ open chassis, large diameter spider, reinforced ferrite magnets resulting in higher power handling, and low resonance frequency and Qts point.
  • 3" large Hexatech™ aluminum voice coil
  • Uniflow™ aluminum diecast chassis
  • High flux ferrite double magnet system
  • Shallow profile DPC cone
  • High excursion
Part # 
Weight: 1.2 lbs.  
Due In: 12/31/2014
List Price$142.99
Regular Price$110.10
You Save20%
Sale Price
Part # 297-080
Qty:  EA
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Product Details

Morel CAW 428 4" Cast Frame Woofer

The Classic Advanced woofers is based on Morel's renowned MW series. These products have high power handling due to the aerodynamic Uniflow™ open chassis and large diameter spider. This woofer has reinforced ferrite magnets for the double magnet system, delivering higher magnetic flux and resulting in a low resonance frequency and Qts point.

Product Specifications
  • Nominal Diameter4"
  • Power Handling (RMS)150 Watts
  • Power Handling (max)800 Watts
  • Impedance8 ohms
  • Frequency Response45 to 3,000 Hz
  • Sensitivity88 dB 2.83V/1m
  • Voice Coil Diameter3"
Thiele-Small Parameters
  • Resonant Frequency (Fs)74 Hz
  • DC Resistance (Re)5.5 ohms
  • Voice Coil Inductance (Le)0.32 mH
  • Mechanical Q (Qms)2.33
  • Electromagnetic Q (Qes)0.46
  • Total Q (Qts)0.38
  • Compliance Equivalent Volume (Vas)0.16 ft.³
  • Mechanical Compliance of Suspension (Cms)1.01 mm/N
  • BL Product (BL)5 Tm
  • Diaphragm Mass Inc. Airload (Mms)4.55g
  • Maximum Linear Excursion (Xmax)4 mm
  • Surface Area of Cone (Sd)57 cm²
Materials of Construction
  • Cone MaterialPoly Composite
  • Voice Coil Wire MaterialAluminum
  • Voice Coil FormerAluminum
  • Basket / Frame MaterialSteel
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter4.67"
  • Baffle Cutout Diameter3.7"
  • Depth1.77"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.05 ft.³
  • Sealed F3154 Hz
  • Vented Volume0.11 ft.³
  • Vented F385 Hz
Morel CAW 428 4" Cast Frame Woofer
  • BrandMorel
  • ModelCAW 428
  • Part Number297-080
  • UPC844632065996
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight1.2 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Morel CAW 428 4" Cast Frame Woofer
Morel CAW 428 4" Cast Frame Woofer is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from Tiny & PowerfulMy computer workstation audio out goes into a Technics receiver and powers a pair of little JBL M5 bookshelf speaker cabinets which sound pretty annoying at any setting other than very soft. Swapping in those Morel 4" speakers made my setup sound pro. Jaws drop when all that sound comes out of those teeny enclosures. It's a riot! I ordered two more for my 47" Visio flatscreen. I had limited space, 2 more M5's and a Sony receiver, so that was another perfect application. Don't expect them to move as much air as a pair of 15" JBL Sub1500's, but they're the first 4" speakers I've seen that won't rip to shreds at 100 watts.
Date published: 2013-05-27
Rated 4 out of 5 by from Clear and presentThis has been part of my first step into speaker building. I could not be happier with the end result.
Date published: 2009-06-19

Product Q&A

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Morel CAW 428 4" Cast Frame Woofer

can this be used in a sealed enclosure and with what results

Asked by: johnny36
If you need any useful low end from it I would not recommend a sealed enclosure. If you want to use it as a dedicated midrange it will be fine in any volume.
Answered by: MattP
Date published: 2014-01-02

box size port diam and length

Asked by: spunky
Total volume of .2 cubic feet with a 1.5" diameter, 5" long port will tune it to 63 Hz with an F3 of 60 Hz.
Answered by: MattP
Date published: 2012-11-14

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