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Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter

Brand:| Model: RS28A-4
The Dayton Audio Reference Series tweeters' unique black anodized 1-1/8" aluminum diaphragms and state-of-the-art motor systems not only match the look and features of the Reference Series woofers, but also match the clean, detailed, and uncolored sound.
  • Tuned rear chamber for great low-end response
  • 1-1/8" Aluminum diaphragm offers amazing clarity without typical metal dome harshness
  • Low-distortion motor system achieves a rare level of transparency
  • Non-shielded version is perfect for high-performance audiophile speakers
  • Great replacement for the Dayton RS28AS-4 1-1/8" Aluminum Dome Shielded Tweeter
Part # 
Weight: 1.8 lbs.  
List Price$79.99
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Dayton Audio RS28TF Truncated Faceplate for RS Tweeters
Qty: 1Part # 275-138
List Price:$14.99
Part # 275-130
Qty:  EA
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Product Details

Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter

The Dayton Audio RS28A-4 Reference Series tweeter is designed to be an excellent match for the Dayton Audio Reference Series woofers. The tweeter's unique black anodized 1-1/8" aluminum diaphragm and state-of-the-art motor system not only matches the look and features of the RS woofers, but also matches the clean, detailed, and uncolored sound. A cast aluminum faceplate, protective mesh grill, tuned rear chamber, and several distortion-reducing paths in the motor system are just a few of the features that allow this tweeter to outperform many expensive audiophile high-frequency transducers.

Product Specifications
  • Tweeter TypeMetal Dome
  • Cone / Dome Diameter1-1/8"
  • Impedance4 ohms
  • Power Handling (RMS)100 Watts
  • Frequency Response1,200 to 20,000 Hz
  • Sensitivity90 dB 2.83V/1m
Thiele-Small Parameters
  • Resonant Frequency (Fs)600 Hz
  • DC Resistance (Re)2.81 ohms
  • Voice Coil Inductance (Le)0.54 mH
  • Mechanical Q (Qms)1.18
  • Electromagnetic Q (Qes)1.03
  • Total Q (Qts)0.55
Mounting Information
  • Overall Outside Diameter4.13"
  • Cutout Diameter2.88"
  • Depth1.81"
Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter
  • BrandDayton Audio
  • ModelRS28A-4
  • Part Number275-130
  • UPC844632001604
  • Product CategoryTweeters
  • Unit of MeasureEA
  • Product Rating
    (17 Reviews)
  • Weight1.8 lbs.
  • Case Qty28
  • 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 Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter
in the Tweeters product category.


Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter
Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter is rated 4.8824 out of 5 by 17.
Rated 5 out of 5 by from nice tweetI've used this tweet in a couple project now and have yet to be disappointed. Handles power well and sounds good.Works well with a 2nd-order @ 2khz that approachs 18dB/oct below 1000Hz. Also works well with a 4th-order @ 1.2khz.
Date published: 2011-01-03
Rated 5 out of 5 by from Fine tweeterVery nice clear tweeter. Very clear for pop/jazz, for classical, the aluminum dome highs are not as natural. I will get the silk dome version to do a comparison.
Date published: 2010-03-23
Rated 5 out of 5 by from Automotive useI decided to try these on a whim for an automotive installation...All I can say is WOW. I have them crossed at 1.2khz, active 24db, w/100w each to match up with a set of front mids in my car. They are kick panel mounted on angled rings.I had some reservations about using an aluminum dome in the car, but not anymore. These have absolutely no sibilance or harshness in my application and are very clean and clear. They have also completely know there is a tweeter there, but you cannot locate it with your ear.
Date published: 2009-11-16
Rated 5 out of 5 by from Outstanding reprodution of highsUsed in front surrounds out performs my JBL studio monitors
Date published: 2009-07-28
Rated 5 out of 5 by from Used to replace speakers in AR 48Sounds as good as new!
Date published: 2009-05-03
Rated 5 out of 5 by from Great replacement tweeters...I bought these to replace the tweeters in my beloved Celestion 100s. The original tweeters were the sweetest I've ever heard, but they introduced a low-level graininess in the midrange, something that once heard could not be ignored. The Daytons with nothing more than a 1.2-ohm resister added in series after the crossover to balance the output with the midbass driver, do a great job. Wonderful clean highs, if ever so slightly less "sweet" than the Celestions, but NO midrange grain whatever. Definite keepers.
Date published: 2009-02-06

Product Q&A

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who own this product or have experience with it.
If your question requires design or troubleshooting information,
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Dayton Audio RS28A-4 1-1/8" Aluminum Dome Tweeter

Are those SPL (sound pressure level) numbers? If so, they are much lower than the 94.4 db on the specification sheet at the Parts Express website. One of the decimal was red marked. What does it mean? What was it matched to?

Asked by: Kei Lau
The manufacturer measures these tweeters with 1 watt as opposed to 2.83 volts as specified on our spec sheet. This will account for the difference. The checked decimal number is the tolerance. For example, if the number in the box is 90 and 0.4 is checked or marked, that tweeter sensitivity is 90.4 dB at 1w/1M.
Answered by: MattP
Date published: 2014-11-20

On each of the speaker, there is a sticker with a bunch of number on it? A single 2 digits on the top row and a series of decimal numbers from .6 to -.6 below. The 2 digits number above the row of decimal numbers is 90 on one and 88 on the other.

Asked by: Kei Lau
These numbers represent the sensitivity tolerances of each driver. For example, if one tweeter reads 88 in the box, and 0.4 is checked, that tweeter is 88.4 dB sensitive.
Answered by: MattP
Date published: 2014-11-17

Does this, as well as most other drivers and tweeters sold come with mounting hardware?

Asked by: JDCrae
Unfortunately this along with most other drivers do not include mounting screws.
Answered by: MattP
Date published: 2014-08-12

CAN it be à good replacement speaker for Energy Pro monitor 22?

Asked by: Jean Re
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: 2014-07-22

How much power can this tweeter take at 1500hz 4th order acoustical?

Asked by: Monkish
If you look at the download sheet - you will see two curves. One for frequency response which shows the driver to be pretty flat to 1500 hz. The other graph, however, shows impedance/phase where it begins to cause all sorts of problems at around 2000 hz. So if you were to use the driver below 2000 hz, you would need an additional section to your crossover to compensate for the phase issue. It is called a Zobel. A 4th order network is the best audiophile crossover you can build for many reasons. I suggest 2000hz as your crossover point. Now - how much power can the tweeter take? The specification is 100 watts RMS continuous. Nominally in a home theater system or louder music system - the tweeter may see 10 to 25 watts continuous with peaks of over 100 watts for transients. If you want to push 100 Watts continuous - that is more for a PA application and would require a different driver with much higher efficiency - in the order of 100db 1w/1m minimum... This driver is an audiophile driver with a corresponding efficiency. If you look at many high quality factory built speakers - they will say 88 or 89 db efficient. Hope all this info helps... Good luck with your project.
Answered by: MarkAJH
Date published: 2014-11-20

face plate mounting

what is the spacing of the faceplate screws not the mounting holesie holds the driver to the faceplate
Asked by: Knowitfixit
The faceplate mounting screws are 42mm from "corner to corner" and 60mm diagonally.
Answered by: MattP
Date published: 2014-03-14

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