Goldwood GW-4028/S 4" Woofer Shielded

Brand:|Model: GW-4028/S
These drivers feature a poly-mica cone, 1" voice coil, and rubber surround, making them great for small home theater projects.
In Stock
Your Price
Buy 4+$11.04
Part # 290-373

Product Details

Goldwood GW-4028/S 4" Woofer Shielded

These drivers feature a poly-mica cone, 1" voice coil, and rubber surround, making them great for small home theater projects. With an extremely small stray magnetic field, they can be used very close to CRT-based monitors.

Product Specifications
  • Nominal Diameter4"
  • Power Handling (RMS)40 Watts
  • Power Handling (max)70 Watts
  • Impedance8 ohms
  • Frequency Response70 to 10,000 Hz
  • Sensitivity83 dB 2.83V/1m
  • Voice Coil Diameter1"
  • Magnet Weight16 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)83.1 Hz
  • DC Resistance (Re)7.1 ohms
  • Voice Coil Inductance (Le)0.4 mH
  • Mechanical Q (Qms)2.4
  • Electromagnetic Q (Qes)1
  • Total Q (Qts)0.7
  • Compliance Equivalent Volume (Vas)0.07 ft.³
  • Mechanical Compliance of Suspension (Cms)0.61 mm/N
  • BL Product (BL)4.8 Tm
  • Diaphragm Mass Inc. Airload (Mms)6g
  • Maximum Linear Excursion (Xmax)1.5 mm
  • Surface Area of Cone (Sd)49.5 cm²
Materials of Construction
  • Cone MaterialPoly
  • Surround MaterialRubber
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter4.375"
  • Baffle Cutout Diameter3.75"
  • Depth2.75"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.12 ft.³
  • Sealed F3103 Hz
  • Vented Volume0.2 ft.³
  • Vented F353 Hz
Goldwood GW-4028/S 4" Woofer Shielded
  • BrandGoldwood
  • ModelGW-4028/S
  • Part Number290-373
  • UPC643420100259
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (14 Reviews)
  • Weight2.65 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.

View similar products to the Goldwood GW-4028/S 4" Woofer Shielded
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Goldwood GW-4028/S 4" Woofer Shielded
Goldwood GW-4028/S 4" Woofer Shielded is rated 4.0714 out of 5 by 14.
Rated 4 out of 5 by from Good ReplacementBought one of these several years ago to replace a blown woofer on a Realistic Minimus 7. Perfect drop-in, no mods. I don't know if it's an exact replacement, but it looks almost exactly the same, except made in Malaysia instead of Japan, and my ears can't tell the difference.
Date published: 2015-07-02
Rated 4 out of 5 by from Decent little mid-range replacementHad to find replacement mid-range drivers for a pair of KLH 365 tower speakers. The cabinets were still in excellent shape after about 10 years. After minor work with a router, they were a drop in replacement. I did break them in for 50-55 hours. The stated specs for these drivers are very accurate, as I tested all parameters myself and found tolerances rather tight. Considering the price paid, this driver is well worth the money. These mids are playing between 750Hz and 4.4 KHz on my own 3-way, 4th order LR crossover design. Vocals are amazingly clean for this inexpensive midrange. These are not Morel drivers, but for cost-to-performance ratio, I would definitely place these high on the list. These little gems will not dissapoint.
Date published: 2011-12-23
Rated 5 out of 5 by from Used to great success in Line ArrayHave a set of six of these in a line array and they surprising level of detail provided was astonishing.Great speaker and value.
Date published: 2010-09-14
Rated 3 out of 5 by from kinda flimsynot much to say, the mounting holes were too far inward for my purpose, so i cant say about the performance. however, they are very cheaply made and bend easily. one of the frames was bent when i got it, not much, but enough. and the other went flying onto the floor when i tried to open the package and pretty much destroyed it. it was bent enough so that the surround was pulled taught. probably a good driver.
Date published: 2008-11-25
Rated 4 out of 5 by from Great replacement speakerI buy old or used speakers at thrift stores that are good and solid for rebuilding. iSympony pair of speakers are the cabinets I replaced using these. Less the speaker volume you get about 200 cubic inches and ported 1.250 by 3" long tube. Amazing results. Teamed them up with 2.5" cone tweeter 270-034. But there is a problem with these drivers and that is the hook up terminals are switched on some drivers causing a miss matched polarity and could be the reason some are not getting the bottom end results. Check ALL woofers with a battery to confirm the proper polarity.They really are good speakers with a great midrange response and base down to about 50 Hz I would estimate. Perfect for the small compact satellite speakers.
Date published: 2008-09-26
Rated 5 out of 5 by from Good soundI paired this driver with a Goldwood GT-510 1" soft dome tweeter and put both into a sealed enclosure with no stuffing and no internal bracing, crossed with a 2-Way 8 Ohm 5,000 Hz 100W crossover. This was the first speaker I made, so I made some mistakes with the first enclosure, so I re-did it and was amazed by the second one I made. My first attempt I tried to use seperate enclosures for both and basically stack them on top of each other, but my cutting ablility is terrible, so it was rather lopsided.When I built my second enclosure I kept it simple and with a sealed enclosure and put both drivers into the same chamber. I can't believe how much better the speaker sounded than my "consumer" Onkyo speakers. It sounded so much better that I built another one and only listen to them. This driver provides more than enough quality for mid-range sound, but it obviously doesn't do well on the lows, so if you want some bass either go the 3-way route or just add a sub.My next project is going to be a set of 3-way tower speakers to replace these speakers as my fronts and and also, hopefully, a 3-way center channel that isn't ridiculously large and still has the ability to go low enough to give male voices more power.
Date published: 2008-05-23
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Product Q&A

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Goldwood GW-4028/S 4" Woofer Shielded

I looked through the specs and didn't find this: What is the Fo (free air resonance) of this speaker?

Asked by: Jay1Too
The free air resonance of this woofer is 83.1 Hz.
Answered by: MattP
Date published: 2014-11-24

will this replacement sub work in a M-AUDIO Studiophile AV 40?

Asked by: Cr12345678
Unfortunately we do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2014-07-21

looking for a 4" woofer for Minimus sized ported enclosure

looking at Goldwood 4"'s with the rubber surrounds. want to strip out cheap speakers in upscale Aiwa' bookshelf CD-receiver unit and drop in real speakers, x-over and "stuffing" to preserve "look" of the set.
Asked by: DCS1
This would do, but unless you really require shielded speakers [bookshelf speakers were notorious for corrupting video and audio tapes on the same shelf], opt for ones with less depth to maximize the working volume of the enclosure.
Answered by: Fanden
Date published: 2012-02-22
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