Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker

Brand:| Model: CE28A-4R
Product Video
The Dayton Audio CE28A-4R features a high-quality design, excellent audio quality, and easy bond-in-place or press-fit mounting for small projects where high-fidelity sound is needed. A discreet black-anodized aluminum diaphragm delivers sonic detail. 4-ohm impedance.
  • Concave aluminum diaphragm
  • Compact, press-fit frame with a high energy neodymium motor
  • Ferrofluid-cooled, spiderless design
Part # 
Weight: 0.05 lbs.  
List Price$4.99
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Your Price
Buy 100-up$3.11
Part # 285-107
Qty:  EA
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Product Details

Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker

Dayton Audio is pleased to introduce the new Commercial Engineering (CE) Series of small loudspeaker drivers. Engineers, designers, and integrators will benefit from how effortlessly these speaker components satisfy the diverse demands associated with consumer electronics and audio-enabled projects.

Multiple types and styles are available within the CE Series driver family. Each was produced to provide excellent audio quality no matter what the overall system design goals may be, and to suit a wide spectrum of engineering requirements. These versatile yet economical loudspeakers are available in sizes from 28 mm (1-1/8") to 90 mm (3-1/2") in diameter, and with power ratings from 1.5 watts to 5 watts continuous RMS power.

The Dayton Audio CE28A-4R (round frame) offers large-driver features in a mini-speaker format. It features an elegant black-anodized concave aluminum diaphragm and compact neodymium motor structure for high fidelity and output. Perfect for ultra-miniature multimedia speakers, docking speakers for portable music players, and alarm clocks, among other uses. The round frame can be press-fit or glued in place.

Product Specifications
  • Nominal Diameter1"
  • Power Handling (RMS)2 Watts
  • Power Handling (max)4 Watts
  • Impedance4 ohms
  • Frequency Response300 to 20,000 Hz
  • Sensitivity79 dB 2.83V/1m
  • Voice Coil Diameter0.67"
Thiele-Small Parameters
  • Resonant Frequency (Fs)300 Hz
  • DC Resistance (Re)3.55 ohms
  • Voice Coil Inductance (Le)0.15 mH
  • Mechanical Q (Qms)2.45
  • Electromagnetic Q (Qes)1.56
  • Total Q (Qts)0.95
  • Mechanical Compliance of Suspension (Cms)1.03 mm/N
  • BL Product (BL)1.08 Tm
  • Diaphragm Mass Inc. Airload (Mms)0.26g
  • Maximum Linear Excursion (Xmax)1.1 mm
  • Surface Area of Cone (Sd)2.99 cm²
Materials of Construction
  • Cone MaterialAluminum
  • Surround MaterialFoam
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter1.09"
  • Baffle Cutout Diameter1.05"
  • Depth0.44"
Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker
  • BrandDayton Audio
  • ModelCE28A-4R
  • Part Number285-107
  • UPC848791000447
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (4 Reviews)
  • Weight0.05 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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Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker
Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker is rated 4.75 out of 5 by 4.
Rated 4 out of 5 by from Good sound!I bought these to build my own headphones. I only wished they would have come with wires on them. The soldering tabs are very sensitive to heat since they are held by light weight plastic. They do sound good but I may have to order another since the one got too hot with my iron. ;{
Date published: 2015-05-23
Rated 5 out of 5 by from Great Little speakerI used this to replace a busted speaker on a Jabra blue tooth device. The speaker is not the same diameter but the depth is just right. Soldering the speaker terminal was easy and I had to glue gun the terminal base to the bottom part of the Jabra.It saved me a lot of money instead of buying a new blue tooth for the car.
Date published: 2014-06-23
Rated 5 out of 5 by from Excellent little speaker!I use this speaker to push a wooden puck that's used in a therapeutic massage system. It does the job beautifully!
Date published: 2014-03-09
Rated 5 out of 5 by from Mini SpeakersMy husband needed miniature speakers to place around his model train tracks for train realism for when he attached his camera to the train for recording. These speakers are powerful enough, yet small enough to hide. We looked several places before selecting PartExpress. They were perfect.
Date published: 2013-05-22
  • 2015-07-04T06:58CST
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Product Q&A

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who own this product or have experience with it.
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Dayton Audio CE Series CE28A-4R 1-1/8" Round Frame Mini Speaker

Sensitivity?  Specs sheet says 76dB, but the frequency-response graph shows more like 96dB.

Asked by: mcargill
This will be closer to 76 dB sensitivity, the scale on the spec sheet is wrong.
Answered by: MattP
Date published: 2014-03-20

Recommended amp for this?

Asked by: CreativeUsername
Basically anything will drive this as long as it is rated for 4 ohms and has at least two watts of output power.http://www.parts-express.com/2x2w-@-4-ohm-class-d-audio-amplifier-board--320-306
Answered by: MattP
Date published: 2013-11-18


Five of these per enclosure...vented or sealed, what dimensions either way?
Asked by: NewB
With an Fs of 300 Hz the enclosure size and type will not make any difference as these will not produce any appreciable low frequencies.
Answered by: MattP
Date published: 2014-01-15
  • 2015-07-04T08:59CST
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