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RST28F-4 1-1/8" Reference Series Fabric Dome Tweeter 4 Ohm
Quick Overview
The Dayton Audio RST28F-4 1-1/8" silk dome Reference Series tweeter has remarkable clarity, low free air resonance, exceptional efficiency, and smooth frequency response, a combination seldom found in the industry at any price. This upgrade over the original RS28F-4 provides incredible performance at an amazing value.Product Highlights
- 1-1/8" silk diaphragm offers remarkable clarity
- Exceptional efficiency at 93.5 ±3dB from 1.4 kHz to 20 kHz and a smooth frequency response
- Well-designed phase bridge to balance the response in the upper octave
- Tuned rear chamber and high-quality Ferrofluid for excellent low-end response
- Low-distortion motor system achieves a rare level of transparency
- Matches the performance of even the most expensive audiophile high-frequency transducers
Product Manuals / Spec Sheets / Downloads
Dayton Audio RST28F-4 Specification SheetDayton Audio RST28F-4 Data Files
Buying Options
The Dayton Audio RST28F-4 silk dome Reference Series tweeter offers exceptional efficiency from 1,400 Hz to 20,000 Hz with an extremely natural and dynamic sound. This unique 1-1/8" silk dome and a state-of-the-art Ferrofluid cooled motor system employs copper shorting rings to ensure that high frequency content is reproduced as transparently as possible, assuring studio-quality performance. RST28F-4 tweeters not only match the look and features of the RS woofers and midranges but also the clean, detailed, and uncolored sound that characterizes the entire series. These are just a few of the features that allow these tweeters to outperform some the most expensive audiophile high-frequency transducers.
| Speaker Series | Reference Series |
| Model Number | RST28F-4 |
| Color | Black |
| Unit of Measure | Each |
| UPC | 848791004919 |
| Warranty - Parts | 5 Years |
| Warranty - Labor | 5 Years |
| Product Shipping Weight (lbs.) | 1.8 |
| Speaker Type | Tweeter |
| Nominal Diameter | 1.125" |
| Power Handling (RMS) | 80 watts |
| Power Handling (max) | -- |
| Continuous Program Power | -- |
| Impedance | 4 ohms |
| Sensitivity | 93.5 dB @ 2.83V/1m |
| Frequency Response | 1,400 - 20,000 Hz |
| Voice Coil Diameter | -- |
| Magnet Weight | -- |
| DC Resistance (Re) | 3.0 ohms |
| Voice Coil Inductance (Le) | 0.03 mH |
| Resonant Frequency (Fs) | 710 Hz |
| Mechanical Q (Qms) | 2.52 |
| Electromagnetic Q (Qes) | 1.46 |
| Total Q (Qts) | 0.92 |
| Diaphragm Mass Inc. Airload (Mms) | -- |
| Moving Mass Of Diaphragm (Mmd) | -- |
| Mechanical Compliance of Suspension (Cms) | -- |
| Surface Area Of Cone (Sd) | 6.6 cm² |
| Volume of Displacement (Vd) | -- |
| BL Product (BL) | -- |
| Compliance Equivalent Volume (Vas) | -- |
| Maximum Linear Excursion (Xmax) | -- |
| Drivers Mechanical Losses (Rms) | -- |
| Entry / Exit Diameter | -- |
| Surround Material | -- |
| Voice Coil Wire Material | -- |
| Voice Coil Former | -- |
| Basket/Frame Material | -- |
| Magnet Material | -- |
| Overall Outside Diameter | 4.125" x 3.25" |
| Overall Depth | 1.75" |
| Baffle Cutout Diameter | -- |
| Mounting Hole Diameter | -- |
| Bolt Circle Diameter | -- |
| Product Weight | -- |